The 1933 PA-24 (ATC 507) was a two-place modified twin-tail version of PA-20 and PAA-1 with changes in powerplant and rotor system.
Two were built, NC11631 and NC11634, plus about 20 modifications of earlier models.
Year: 1932
Engine: Kinner R-5, 160 hp
Rotor dia: 37 ft
No of blades: 4
Wing span: 22’9″
Length: 18’7″
Gross wt: 1800 lb
Fuel cap: 27 USG
Gross wt: 1750 lb
Empty wt: 1178 lb
Useful load: 572 lb
Max speed: 90 mph
Cruise speed: 75 mph
Range: 235 mi
ROC: 550 fpm
Service ceiling: 10,000 ft
Seats: 2
All Aero 