AirWolfRC
Elite Veteran
Location: 42½ N, 83½ W
| From http://en.wikipedia.org/wiki/Hughes_XH-17
The propulsion system was highly unusual. Two turbojet engines were used, sending bleed air up through the rotor hub. The blades were hollow, and the hot, compressed air traveled through the blades to burners at the tips where fuel was injected. In flight the rotors were designed to spin at a sedate 88 rpm. Since the rotor was driven at the tips rather than by the hub, little torque compensation was required. Thus, the XH-17 had a very small tail rotor compared to its main rotor. This drive system was inefficient, limiting the test aircraft to a range of only 40 miles (64 km). |
Wonder how long it would take to flip to inverted 
