These are two versions of the same aircraft with 
            an MTOW of 450Kg. They have side by side seating. 
            The Sonet is powered by a 65hp Hirth 2706E giving 
            a cruise speed of 75Kt with a max speed of 97Kt.
            
            
            Sonet
            The Sonata is powered by a 50 hp Hirth F23 and is 
            a more serious glider, with propeller blades that fold when not in 
            use. 
            
            
            Sonata