Method and apparatus for measuring the airspeed of a helicopter

Details Method and apparatus for measuring the airspeed of a helicopter Method and apparatus for measuring the airspeed of a helicopter

1988-02-01

1989-01-03

Woodiel, Donald O.

Measuring and testing

Navigation

Take-off and landing monitors

73181, 364443, G01C 2110

Patent

active

047947934

ABSTRACT:
A helicopter is provided with a lift rotor (Ros), a tail rotor (Rac), first control means for the longitudinal (Pcx) and lateral (Pcy) cyclic pitch of the lift rotor and second control means for the pitch (Pac) of the tail rotor. The parameters such as the longitudinal cyclic pitch (Pax), the lateral cyclic pitch (Pcy), the longitudinal acceleration (Vx) and the acceleration of the helicopter (Vy) as well as the collective pitch (Pcol) of the lift rotor (Ros) and the pitch of the tail rotor (Rac) are measured. The longitudinal (Vax) and lateral (Vay) speed of the helicopter with respect to the air are determined from a biunivocal function of the measured values, particularly in linear combination.

REFERENCES:
patent: 4023409 (1977-05-01), Durand
patent: 4648269 (1987-03-01), Durand
patent: 4702106 (1987-10-01), Hassenpflug et al.

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