  
       
                                                        
                                                        
                                                        
                                                        Van's  
                                                        RV 3 
                                                        
                                        by 
       Budd Davisson, courtesy of 
       www.airbum.com
                                        
                                        
                                                          
                                                        
                                                      
                                                          
  
                                                      
                                                      
                                                      
                                                      August, 1973, Fond du Lac, 
                                                      Wisconsin. Climbing out of 
                                                      the Van Grunsven RV-3 
                                                      after my first flight, it 
                                                      struck me how incredibly 
                                                      far the art of 
                                                      homebuilding has 
                                                      progressed. There was a 
                                                      time, not long ago, when 
                                                      the term homebuilt meant 
                                                      an airplane that could go 
                                                      like blazes, but came down 
                                                      final with all the grace 
                                                      and docility of a torpedo. 
                                                      Or, if it were a slow, 
                                                      easy-to-land airplane, it 
                                                      couldn't outrun an 
                                                      asthmatic hummingbird. It 
                                                      was axiomatic that a 
                                                      homebuilt airplane usually 
                                                      (note, I said usually) 
                                                      couldn't handle both ends 
                                                      of the speed or talent 
                                                      spectrum. It was either a 
                                                      fast, raunchy-handling 
                                                      dude, or a slow, rather 
                                                      matronly machine. But the 
                                                      times are changing. 
                                                       
                                                      In the past few years, 
                                                      several designs have 
                                                      popped up that turned out 
                                                      to be a little faster than 
                                                      it seemed they ought to 
                                                      be, but were still fairly 
                                                      easy to fly. They didn't 
                                                      represent any quantum jump 
                                                      in either direction, 
                                                      though. Then the RV-3 came 
                                                      along, and the old saying 
                                                      about "airplanes fly like 
                                                      they look" was twisted 
                                                      into scrabble. Everything 
                                                      that gut-engineering says 
                                                      about the RV-3 is wrong. A 
                                                      little old-time homebuilt 
                                                      savvy applied to the RV-3 
                                                      says it's going to be 
                                                      fairly fast for its 
                                                      horsepower, 150 mph maybe, 
                                                      but it also looks as if 
                                                      it'll need around 90 mph 
                                                      on final and will skip and 
                                                      skitter on the runway 
                                                      after touching down at 65 
                                                      to 70 mph. Wrong in every 
                                                      department. It's far 
                                                      faster than it looks, and 
                                                      its low-speed envelope 
                                                      belongs to a 
                                                      fabric-covered putt-putt, 
                                                      rather than an all-metal, 
                                                      barn yard bullet. The RV-3 
                                                      may just be the best of 
                                                      the new breed of 
                                                      homebuilts. (Note from 
                                                      2003: Man! Am I prophetic 
                                                      or what?) 
                                                       
                                                      In some ways, Richard Van 
                                                      Grunsven himself 
                                                      represents a new breed of 
                                                      homebuilder: the 
                                                      professional homebuilder. 
                                                      A trained mechanical 
                                                      engineer, he bailed out of 
                                                      the job market and decided 
                                                      to do what he liked 
                                                      best—design and build 
                                                      airplanes. Now he's one of 
                                                      dozens of guys around the 
                                                      nation who design and 
                                                      build, draw up plans, tool 
                                                      up for producing parts and 
                                                      cast their bread upon the 
                                                      waters of sport aviation. 
                                                       
                                                      In the midst of the 
                                                      current hoopla as various 
                                                      promoters try to corner 
                                                      their share of the 
                                                      homebuilding buck, Van 
                                                      Grunsven comes on like a 
                                                      monk. He's one of the most 
                                                      understated salesmen in 
                                                      the business. He's so 
                                                      quiet and soft-spoken that 
                                                      he sounds almost 
                                                      apologetic for building 
                                                      such a pretty little 
                                                      high-performance airplane. 
                                                      The only time he gets an 
                                                      edge in his voice is when 
                                                      he tries to impress his 
                                                      listeners with the honesty 
                                                      and accuracy of his 
                                                      claims. He's terrified 
                                                      he'll be lumped in with 
                                                      the designers who make 
                                                      claims of fighter 
                                                      performance when their 
                                                      airplanes are 
                                                      run-of-the-mill pattern 
                                                      ponies. It anybody wonders 
                                                      how he arrived at a 
                                                      particular performance 
                                                      number, he'll eagerly 
                                                      search through the reams 
                                                      of notes he made while 
                                                      conducting hundreds of 
                                                      tests, measuring takeoff 
                                                      distances, calibrating 
                                                      airspeeds and verifying 
                                                      numbers. 
                                                      
                                                      
                                                        
                                                      
                                                      
                                                      His concern about people 
                                                      doubting his performance 
                                                      specs should have 
                                                      disappeared when he not 
                                                      only won, but set an 
                                                      all-time record for the 
                                                      Pazmany Efficiency Contest 
                                                      this year at Oshkosh. His 
                                                      top speed in a level run 
                                                      was over 207 mph, measured 
                                                      from the ground, and his 
                                                      slow speed was 53.8 mph! 
                                                      How's that for a 
                                                      performance envelope? His 
                                                      score was 11.77 with the 
                                                      closest competitor at 
                                                      10.45, and the average 
                                                      around 6.8. His efficiency 
                                                      index is the highest 
                                                      recorded since the contest 
                                                      was begun several years 
                                                      ago. That means he is not 
                                                      only squeezing those 125 
                                                      ponies to make them run, 
                                                      but has a way of keeping 
                                                      the airplane flying at a 
                                                      ridiculously low speed. 
                                                       
                                                      This year was the second 
                                                      showing of the RV-3 at 
                                                      Oshkosh, and even though 
                                                      it's an incredibly pretty 
                                                      machine, it didn't attract 
                                                      nearly the audience it 
                                                      should have. Because it 
                                                      doesn't have the exotic 
                                                      appeal of a negative 
                                                      staggered triplane, or a 
                                                      one-eighth-scale B-36, 
                                                      it's easily overlooked. It 
                                                      has conventional sheet 
                                                      metal construction with 
                                                      tapered steel Wittman-type 
                                                      landing gear and a 125-hp 
                                                      Lycoming ground power unit
                                                      (Again from 2003: 
                                                      notice the engine, you 
                                                      horsepower freaks and it 
                                                      still really performs). 
                                                       
                                                      With 90 square feet of 
                                                      wing area (nearly the same 
                                                      as a two-place Thorp 
                                                      T-18), it's slightly 
                                                      larger than most 
                                                      homebuilts, but even so it 
                                                      doesn't stand out at a 
                                                      crowded air show. It's 
                                                      only when you take it away 
                                                      from the crowd that the 
                                                      true beauty of the 
                                                      airplane shows up.  
                                                       
                                                      Aesthetically, it might 
                                                      look better with tapered 
                                                      wings, since its 
                                                      Hershey-bar planform looks 
                                                      a little out of place with 
                                                      the, sleek racer-type 
                                                      fuselage, however, the 
                                                      square wing means only one 
                                                      size rib and one formblock 
                                                      per side. Part of Van 
                                                      Grunsven s business (Van's 
                                                      Aircraft, Forest Grove, 
                                                      Oregon) is manufacturing 
                                                      fiberglass aircraft parts, 
                                                      so it's only natural that 
                                                      the wheelpants, Hoerner 
                                                      type wingtips and 
                                                      shark-nosed cowling are 
                                                      also available. 
                                                       
                                                      The thought and planning 
                                                      that shows on the outside 
                                                      extends to the cockpit as 
                                                      well. Although spartan in 
                                                      appearance, there is 
                                                      plenty of room for 
                                                      comfort, but not enough to 
                                                      slow the airplane down. As 
                                                      I strapped it on, I was 
                                                      surprised to find it much 
                                                      roomier than I had 
                                                      imagined. I even needed an 
                                                      inch of folded sectionals 
                                                      behind the seat cushions 
                                                      to get close enough to the 
                                                      rudder pedals. There was 
                                                      also more than enough 
                                                      headroom with the canopy 
                                                      closed. 
                                                       
                                                      The layout of the cockpit 
                                                      itself is 100 percent 
                                                      conventional. Everything 
                                                      is where you'd expect to 
                                                      find it in any airplane, 
                                                      positioned so they're easy 
                                                      to find. My only minor 
                                                      complaint with the control 
                                                      layout was that the 
                                                      carburetor heat was on the 
                                                      right side of the cockpit, 
                                                      requiring me to cross over 
                                                      with my left hand, or 
                                                      change hands on the stick 
                                                      to get it. 
                                                       
                                                      One rather unusual aspect 
                                                      of the control system, 
                                                      however, was a set of 
                                                      springs attached to the 
                                                      base of the stick, on 
                                                      either side, that served 
                                                      to keep it centered. Van 
                                                      Grunsven explained that 
                                                      this was because he'd gone 
                                                      slightly overboard in 
                                                      balancing the ailerons, so 
                                                      there was no feeling of 
                                                      neutral aileron in flight. 
                                                      And for the first few 
                                                      degrees of stick movement, 
                                                      the overbalanced condition 
                                                      felt like power steering. 
                                                      He's corrected this in his 
                                                      plans. 
                                                      
                                        
                                                        
      
                                                      
                                                        
                                                      
                                                        
                                                      
                                                      
                                                      About 70 percent of the 
                                                      homebuilts around have at 
                                                      least one or two strange 
                                                      ground handling 
                                                      characteristics built in 
                                                      by the owners. Not so with 
                                                      the RV-3. Everything is so 
                                                      well set up that anybody, 
                                                      tailwheel pilot or not, 
                                                      could herd it around the 
                                                      runways. It's not often 
                                                      that I have confidence in 
                                                      an airplane before 
                                                      takeoff, but I felt that 
                                                      the easy ground handling 
                                                      of the RV-3 was a good 
                                                      Omen. 
                                                       
                                                      The takeoff was something 
                                                      else. It's not the 
                                                      acceleration that's 
                                                      surprising, it's the way 
                                                      it gets off the ground 
                                                      before you finish putting 
                                                      the throttle in. It was 
                                                      fairly late in the evening 
                                                      when I took off, so there 
                                                      was no wind to help me 
                                                      off. Even so, I barely had 
                                                      the throttle all the way 
                                                      in and was just beginning 
                                                      to raise the tail when it 
                                                      lifted off three-point The 
                                                      The RV-3 needed only 200 
                                                      feet to get up enough lift 
                                                      to go flying. If that 
                                                      isn't ST0L, I don't know 
                                                      what is. 
                                                       
                                                      It's one thing to get off 
                                                      short, but it's something 
                                                      else entirely to get over 
                                                      an obstacle. Nevertheless, 
                                                      the RV-3 shines there, 
                                                      too—If you take off in a 
                                                      three-point attitude, you 
                                                      have to pull the nose up 
                                                      even further to keep the 
                                                      speed down. I timed the 
                                                      climb at something over 
                                                      1,800 fpm with an angle of 
                                                      around 20 to 30 degrees. 
                                                       
                                                      The ailerons aren't light, 
                                                      they're super light! 
                                                      Because of the 
                                                      overbalanced control 
                                                      surfaces, there Is 
                                                      practically no feel at all 
                                                      to the stick. It would 
                                                      move by itself if the 
                                                      centering springs weren't 
                                                      at work. But don't get the 
                                                      idea that the ailerons 
                                                      make the airplane tough to 
                                                      fly. They may be light, 
                                                      but stick travel is falrly 
                                                      long, so there's no 
                                                      tendency to over control. 
                                                      The control ratios are so 
                                                      well worked out, and the 
                                                      airplane so stable that I 
                                                      didn't even notice the 
                                                      super light ailerons until 
                                                      I started to turn out of 
                                                      the pattern. (BD 2003 
                                                      note: the fix resulted in 
                                                      almost perfect aileron 
                                                      feel. RV’s have very, very 
                                                      nice ailerons.) 
                                                       
                                                      The first thing I did when 
                                                      I got outside the pattern 
                                                      was set up a level cruise 
                                                      and start zipping across 
                                                      the parallel section lines 
                                                      below while watching the 
                                                      sweep second hand on my 
                                                      Micky Mouse special. I was 
                                                      going to find out for 
                                                      myself whether Van’s 
                                                      claims wore true. At 
                                                      different power settings, 
                                                      all of them between 2100 
                                                      and 2500 rpm, I got speeds 
                                                      between 155 mph and 175, 
                                                      mph. At about 75% power he 
                                                      claimed 170 mph and 9 to 
                                                      10 gallons/hour and I was 
                                                      doing better than that. 
                                                       
                                                      One thing is for sure. the 
                                                      RV-3 will climb like 
                                                      crazy. As I finished the 
                                                      last high-speed run, I 
                                                      tweaked the stick back and 
                                                      rammed the power in, 
                                                      dissipating speed in a 
                                                      zooming climb. the 
                                                      altimeter hand started 
                                                      wrapping around, and by 
                                                      the time the IAS was down 
                                                      around climb speed, 90 
                                                      mph, I'd picked up over 
                                                      1,500 feet. At that rate, 
                                                      it took only a couple of 
                                                      minutes to get enough 
                                                      space between me and 
                                                      Wisconsin to keep me 
                                                      comfortable during the 
                                                      upcoming test session. 
                                                       
                                                      What would a test flight 
                                                      be without some stalls? I 
                                                      was in a hurry to get on 
                                                      to the juicier manoeuvres, 
                                                      so I chopped power and got 
                                                      carb heat, holding the 
                                                      nose up all the while. 
                                                      Then I waited, and waited. 
                                                      It took forever to get 
                                                      down under 50 mph, where 
                                                      it shuddered once, ever so 
                                                      slightly, and dropped its 
                                                      nose hard, as if trying to 
                                                      live up to the reputation 
                                                      many feel the NACA 21012 
                                                      airfoil deserves. It broke 
                                                      sharply, but rather than 
                                                      recovering, I held the 
                                                      stick back, curious to see 
                                                      what would happen. The 
                                                      nose fell a few feet, the 
                                                      airplane picked up speed 
                                                      and started flying again 
                                                      then porpoised up into 
                                                      another stall. I was 
                                                      losing very little 
                                                      altitude as I seesawed up 
                                                      and down from stall to 
                                                      stall, keeping the wings 
                                                      level with both aileron 
                                                      and rudder. The stall was 
                                                      sharp and with little 
                                                      warning, but recovery was 
                                                      instantaneous and the 
                                                      airplane didn't try to do 
                                                      anything weird like 
                                                      tucking a wing. 
                                                      
                                                      
                                                        
                                                      
                                                      
                                                      Feeling as if I had 
                                                      discharged my duty as a 
                                                      flight evaluator, I did a 
                                                      screaming 360-degree turn, 
                                                      clearing for traffic, and 
                                                      pulled the nose up. I 
                                                      twitched the stick to one 
                                                      side and the small town on 
                                                      the distant horizon 
                                                      obediently curved up and 
                                                      over the nose. The rolls 
                                                      were indecently easy, so I 
                                                      started doing four points, 
                                                      then eight points, and 
                                                      finally a 15 point (I 
                                                      never could keep track in 
                                                      those things). The plane 
                                                      would jerk to a halt so 
                                                      cleanly that I could 
                                                      almost hear each point 
                                                      squeak. The rate of roll 
                                                      was so high, and the speed 
                                                      bleed-off in verticals so 
                                                      low, that I soon found 
                                                      myself doing loops with 
                                                      slow rolls on the top, 
                                                      Immelmanns and Cuban 
                                                      eights with double and 
                                                      triple rolls on the 
                                                      recovery requiring nothing 
                                                      more than putting the 
                                                      stick to one side at the 
                                                      appropriate time. 
                                                       
                                                      Richard Van Grunsven had 
                                                      warned me that it didn't 
                                                      snap roll very well, and I 
                                                      proved him right, again 
                                                      and again. It would start 
                                                      around like a good little 
                                                      airplane, but then the 
                                                      wing would start flying 
                                                      again and swoop out of the 
                                                      last 90 degrees or so. For 
                                                      an airplane to snap roll 
                                                      well, it has to be 
                                                      high-speed stalled by 
                                                      jerking the slick back and 
                                                      then kicked into a 
                                                      horizontal spin with full 
                                                      rudder in the direction of 
                                                      the roll. The RV-3 has a 
                                                      wing that almost refuses 
                                                      to stall quickly, probably 
                                                      because of the planform 
                                                      and light wing loading. 
                                                      Elevator effectiveness 
                                                      might have something to do 
                                                      with it, too, but I was 
                                                      getting as much as 4.5Gs 
                                                      trying to snap at 90 mph, 
                                                      so it seemed to have 
                                                      enough elevator. It would 
                                                      probably take nothing more 
                                                      than a couple of stall 
                                                      strips taped to the 
                                                      leading edges to make it a 
                                                      snap-rolling fool. It does 
                                                      everything else so nicely, 
                                                      it would be worth the 
                                                      experimentation to make it 
                                                      snap roll equally well. 
                                                      Even in its present form, 
                                                      it would make d good 
                                                      competitive mount for 
                                                      anyone wanting to play In 
                                                      Sportsman or Intermediate 
                                                      category aerobatics (2003 
                                                      note: forget about 
                                                      intermediate category 
                                                      today. It has gotten far 
                                                      too demanding for the RV.) 
                                                       
                                                      The spins also were 
                                                      strange, primarily because 
                                                      I couldn't hold the RV-3 
                                                      in one. It would do about 
                                                      one turn and then fly out 
                                                      into a spiral like a 
                                                      Cherokee. I finally got it 
                                                      to spin a little longer by 
                                                      using some power. Van 
                                                      Grunsven says it'll do a 
                                                      dandy flat spin with power 
                                                      and crossed controls, and 
                                                      stop exactly when you want 
                                                      it to. I didn't know that 
                                                      at the time, which was 
                                                      just as well because I've 
                                                      always put flat spins in 
                                                      the same category as 
                                                      alligators when thing when 
                                                      it comes to fun. 
                                                       
                                                      Somehow, as I turned into 
                                                      the pattern, I knew the 
                                                      landing was going to be no 
                                                      sweat. The hardest part 
                                                      was to force myself to 
                                                      approach at only 70 mph 
                                                      indicated. Van Grunsven 
                                                      said even 60 to 65 mph was 
                                                      okay, but 70 mph made me 
                                                      feel as if I were 
                                                      crawling—it was unnatural. 
                                                      I kept moving my patterns 
                                                      out until I could make a 
                                                      comfortable power-off 180° 
                                                      approach, using flaps to 
                                                      get rid of altitude when I 
                                                      wanted. 
                                                      I made the first landing a 
                                                      wheelie, just to see what 
                                                      would happen—it was 
                                                      beautiful. I held it off 
                                                      and let it settle on main 
                                                      gear first, feeding just a 
                                                      little forward stick in to 
                                                      keep it planted when the 
                                                      tires touched. That 
                                                      springy Wittman-type gear 
                                                      took up any bounce and let 
                                                      me motor straight ahead 
                                                      with no effort. The next 
                                                      couple were 
                                                      three-pointers, and were 
                                                      noteworthy for only two 
                                                      reasons. During the flare, 
                                                      the airplane slows to a 
                                                      porcupine pace, and my 
                                                      mother could control the 
                                                      rollout.  
                                                       
                                                      Everything about the way 
                                                      the airplane flies is 
                                                      slightly out of character 
                                                      with Its appearance, but 
                                                      its landings are too good 
                                                      to be true. In a 
                                                      three-point, you don't 
                                                      roll more than 200 to 300 
                                                      feet, and you could be 
                                                      manicuring your toenails 
                                                      through the whole thing. 
                                                      It ranks with a Fly Baby 
                                                      or a Citabria for 
                                                      docility, but is actually 
                                                      easier to land than 
                                                      either, especially when 
                                                      you consider that you were 
                                                      blasting along at 170 mph 
                                                      only moments before. 
                                                      Fantastic', If you can fly 
                                                      any taildragger, you've 
                                                      got the RV -3 knocked. 
                                                       
                                                      I don't remember when I've 
                                                      had more fun in an 
                                                      airplane. Everything about 
                                                      it is pure pleasure. You 
                                                      can be screaming along, 
                                                      nudging 200 mph, then slow 
                                                      down to 110 mph and slide 
                                                      the canopy hark to suck in 
                                                      the fresh air and play 
                                                      airmail pilot. You can 
                                                      spend the afternoon 
                                                      rehearsing your Gene Soucy 
                                                      imitation and then spiral 
                                                      down to land on a 600-foot 
                                                      strip, turn off at 
                                                      midpoint, and climb out 
                                                      feeling like a missionary 
                                                      pilot in Patagonia. It 
                                                      handles so well in so many 
                                                      different regimes that it 
                                                      borders on the 
                                                      unbelievable, and if I 
                                                      weren't the one writing 
                                                      this, I wouldn't believe 
                                                      it.  
                                                       
                                                      The old axiom about all 
                                                      airplanes being 
                                                      compromises wilts a little 
                                                      when the RV-3 Is studied 
                                                      closely. Van Grunsven uses 
                                                      the term total performance 
                                                      to describe it. Until I 
                                                      flew the airplane, I 
                                                      didn't honestly believe 
                                                      him. Now, I do. It really 
                                                      is an everything airplane 
                                                      for the anything pilot.  
                                        
                                         
                              
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