AR-1 gyro manufacturer
- Oct 31, 2011
- Tampa, FL
- Total Flight Time
- 3600+ .. New to gyroplanes
We have to compare the benefit to the power required OGE on the engine shaft .
Parasit drag 175 N (if S*Cd = 0.7)
Rotor drag 1020 N OGE
Total 1195 N OGE
Power on engine shaft = 1195 N * 20.1 m/s /0.6 = 39.8 kw
Hence a benefit of 8 %.
Now, I did this evaluation for a Cessna 150 (700 kg) at the same speed (flaps down) when the wheels are almost touching the ground (z/b = 0.19)
I get an benefit of 40% (assumed parasit Cd =0.5 included wings)
I think that's in the ball park. Nick Lapos states 8 to 10% in GE in autorotation as well