Nagler NH-160

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

The Nagler NH-160 is a single place helicopter with counter-rotating blades.[1]

Contents

Design and development

Bruno Nagler started with helicopter design with wind tunnel experiments in 1926. Nagler developed the first practical use of a swash plate. The Nagler NH-120 was developed to test the concept of counter-acting rotor torque with a small separate rotor. The engine was mounter above the main rotor on a shaft, and the counter-torque rotor was mounted above it. The NH-160 changed the configuration with a conventional helicopter engine and rotor layout, with the exception of the smaller counter-torque rotor mounted under the fuselage between the landing skids.[2]

A series of disc brakes controlled differential speeds between the two rotors, allowing yaw control. A small tail surface stabilizes the aircraft in forward flight.[3]

Operational history

The NH-160 proved to be much more stable in tests then the NH-120 with a higher center of gravity. The smaller lower rotor spins at a higher rpm, with about 60 percent of the load. The upper rotor is adjustable for lift control.

Variants

NH-120
Helicopter with engine mounted above rotor with a counter-torque rotor mounted above the engine.[4]
NH-170
An enclosed two seat side by side design with a shrouded lower counter-torque rotor.

Specifications (Nagler NH-160)

Data from Sport Aviation

General characteristics

  • Capacity: 1
  • 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

Performance

  • Cruise speed: 221 mph; 356 km/h (192 kn)

See also

Related development
  • XNH I Heliglider
  • Convertocrapt 130
  • Nagler HC-1 Heligyro
  • Nagler VG1 Vertigyro

References

  1. ^ The Aeroplane, Volume 90. 1956. 
  2. ^ Sport Aviation. January 1959. 
  3. ^ "Nagler NH160 Helicopter". http://www.aviastar.org/helicopters_eng/nagler_nh-160.php. Retrieved 10 June 2011. 
  4. ^ Paul Marcel Lambermont, Anthony Pirie. Helicopters and autogyros of the world. 

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