Top speed 200 km/h | ||
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Role Helicopter National origin Japan Status Production suspended (2012) Number built Prototypes only Engine type GEN 125 Cruise speed 100 km/h First flight 1995 Similar Dynali H2S, Guimbal Cabri G2, Groen Hawk 4 | ||
Worlds smallest one man helicopter gen h 4 by adeyto
The GEN H-4 is a Japanese helicopter under development by GEN Corporation of Nagano. The aircraft is intended to be supplied as a kit for amateur construction.
Contents
- Worlds smallest one man helicopter gen h 4 by adeyto
- World s smallest one man helicopter gen h 4
- Design and development
- Variants
- Accidents
- Specifications H 4
- References
World s smallest one man helicopter gen h 4
Design and development
The H-4 was designed to comply with the US FAR 103 Ultralight Vehicles rules, including the category's maximum empty weight of 115 kg (254 lb). The aircraft has a standard empty weight of 70 kg (154 lb). It features two contra-rotating main rotors, a single-seat open cockpit without a windshield, four-wheeled landing gear and four twin-cylinder, air-cooled, two-stroke, 10 hp (7 kW) GEN 125-F engines to provide operational redundancy since the aircraft cannot autorotate in the event of a power failure.
The aircraft fuselage is a simple open frame with a seat mounted on it. Its two coaxial, contra-rotating two-bladed rotors have diameters of 4 m (13.1 ft). The main rotors are both of fixed pitch design, with no articulation in any axis. Steering is accomplished by pivoting the rotor head on a gimbal using a control handle, in a similar manner to a weight shift hang glider. Climb and descent is controlled by increasing and decreasing the throttle. The aircraft lacks a tail rotor as the coaxial, contra-rotating main rotors produce zero net torque. Yawing motion is produced and controlled by electronic gyroscopically-controlled differential electric braking of the main rotors. With its empty weight of 70 kg (154 lb) and a gross weight of 220 kg (485 lb) the H-4 has a useful load of 150 kg (331 lb). With full fuel of 19 litres (4.2 imp gal; 5.0 US gal) the payload is 136 kg (300 lb).
The company indicated that it had suspended production plans by 2012 due to lack of dealers outside Japan and put the cost of a single H-4 at JPY 7,500,000.00 (about US$80,887.59 in 2013). The company stated that it could build the aircraft economically only in lots of ten and at a discounted rate only in lots of one hundred. To facilitate future production the company indicated that it was "looking for sponsors, investors and partners".
Variants
Accidents
On 29 June 2000, the prototype H-4, registered JX0076, was on a test flight at the company plant in Matsumoto-City, Nagano. The pilot was hovering, when the H-4 was hit by a wind gust and contacted the building, 40 m (131 ft) to northwest and then impacted the ground. The pilot was injured and the airframe damaged.
Specifications (H-4)
Data from Bayerl
General characteristics
Performance