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