ultralight helicopter, Gen 4 co axial helicopter, Gen 4 co axial experimental light sport aircraft
helicopter (ELSA), Lightsport Aircraft Pilot News
Gen 4 co axial
ultralight, experimental lightsport aircraft
ANAGISAWA GEN H-4
TYPE: Exoskelitor flying vehicle.
PROGRAMME: Four-engined development of
BDH-3; basic version shown at AirVenture, Oshkosh, 1997; yaw
control by small, electrically powered, auxiliary
propellers; by 1998, yaw accomplished by differentiation of
rotor rpm. Current configuration first flew in 1999.
Marketed in kit form.
H-4: As described.
H-4 UAV: Radio-controlled version,
first flown 22 March 2002.
COSTS: Kit US$50,000 (2002).
DESIGN FEATURES: "Strap-on"
personal helicopter with contrarotating twin blades
of tapered planform and fixed pitch (thus no
autorotation capability - replaced by ballistic
parachute, if desired). Seat, with fuel tank at rear
supported by triangular tube framework landing gear
and footrest. Gimballed platform above occupant's
head houses four small motors, central transmission
and rotor assembly with gears. Combined hand-grip
control column and instrument panel attached to
front of platform. Rotor speed 800 to 900 rpm.
Quoted build time 40 hours.
FLYING CONTROLS: Two-axis control
by tilting of engine/rotor platform; yaw control
effected by thumb switch on instrument panel,
operating electric motor which differentiates speed
of rotors by 1%.
STRUCTURE: Framework of 5cm
aluminium tube; glass fibre seat and backpack;
rotors of carbon fibre and Kevlar, with foam core.
LANDING GEAR: Four small "wheels"
each comprise multiple rollers in circular
POWER PLANT: Four 124cc Gen 125
two-stroke, horizontally opposed, two-cylinder
piston engines with independent ignition, positioned
symmetrically on pivoting platform, each developing
7.5kW at 8,500 rpm. Fuel, of 30:1 petrol and oil
premix, in seatback tank, capacity up to maximum of
Gen 4 co axial helicopter ultralight -
experimental lightsport aircraft
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