Cierva’s C30 series and Pitcairn’s PA-22 and Luscombe-built aluminum body PA-36, and the KD-1 series constructed by Kellett Autogiro Company of Philadelphia were capable of jump take-offs and direct-control without wings.
Designed by Agnew Larsen, one PA-36 Whirl Wing, o Pitcairn-Larsen PA-36, was built, in 1939, NX20674. An all-metal, roadable version of Autogiro AC-35 for military trials with side-by-side cabin, which proved unsuccessful with the advent of the helicopter and it was cut up for scrap during WW2.
Another was partially constructed as the Pitcairn-Larsen PA-36 in 1941.
Year: 1939
Engine: Warner Super Scarab, 165 hp
Rotor dia: 43 ft
No of blades: 3
Length: 20’5″
Width: 8’3″
Gross wt: 2050 lb
Useful load: 625 lb
Max speed: 122 mph
Cruise: 102 mph
Range: 375 mi
Seats: 2
All Aero 