One of the first helicopter tests in the 40 x 80 wind tunnel. John McCloud, pictured, started helicopter work in the 40 x 80. Test 150. Testing the effects of camber on rotor blades.
One of the first helicopter tests in the 40 x 80 wind tunnel. John McCloud, pictured, started helicopter work in the 40 x 80. Test 150. Testing the effects of camber on rotor blades.