|Manufacturer||Nagler Helicopter Company|
|First flight||December 1955|
Design and development
Bruno Nagler began wind tunnel experiments into helicopter design in 1926 and developed the first practical swash plate. The Nagler NH-120 was developed to test the idea of counteracting rotor torque with a small separate rotor. The engine was mounted above the main rotor on a shaft, and the anti-torque rotor was mounted above both. The NH-160 had a conventional helicopter engine and rotor layout, with the exception of the smaller anti-torque rotor mounted under the fuselage between the landing skids. Yaw control on both was effected through changing the difference in rotational speed between the two rotors, using a series of disc brakes. A small tail surface provided directional stability in forward flight. The smaller rotor would spin at a higher rpm, with about 60 percent of the load,. the main rotor being adjustable for lift control.
The NH-160 proved to be much more stable in tests than the NH-120 which had a higher center of gravity.
- Helicopter with engine mounted above rotor with a counter-torque rotor mounted above the engine.
- An enclosed two-seat side-by-side design with a shrouded lower counter-torque rotor.
Specifications (Nagler NH-160)
Data from Sport Aviation
- Capacity: one
- Gross weight: 700 lb (318 kg)
- Powerplant: 1 × McCullough Model 4318 , 72 hp (54 kW)
- Main rotor diameter: 2× 20 ft (6.1 m)
- Main rotor area: 314 sq ft (29.2 m2) Lower rotor 8ft 3 blades
- Cruise speed: 119 mph; 104 kn (192 km/h)
- Related development
- The Aeroplane, Volume 90. 1956.
- Sport Aviation. January 1959. Missing or empty
- Paul Marcel Lambermont, Anthony Pirie. Helicopters and autogyros of the world.