Nagler NH-160

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Nagler NH-160
Role Helicopter
Manufacturer Nagler Helicopter Company
Designer Bruno Nagler
First flight December 1955
Number built 1

The Nagler NH-160 was an experimental single seat helicopter with counter-rotating blades.[1]

Design and development[edit]

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.[2] 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.[3]
An enclosed two-seat side-by-side design with a shrouded lower counter-torque rotor.

Specifications (Nagler NH-160)[edit]

Data from Sport Aviation

General characteristics

  • 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)

See also[edit]

Related development


  1. ^ The Aeroplane, Volume 90. 1956. 
  2. ^ Sport Aviation. January 1959.  Missing or empty |title= (help)
  3. ^ Paul Marcel Lambermont, Anthony Pirie. Helicopters and autogyros of the world.