Warning device for helicopters

Details Warning device for helicopters Warning device for helicopters

1983-07-28

1985-07-09

Groody, James J.

Communications: electrical

Aircraft alarm or indicating systems

Nonairplane

340941, 340963, 73178H, 73178T, 364433, 244 1711, G08G 500

Patent

active

045285640

ABSTRACT:
A warning device, for a helicopter with a tail rotor and a mechanical protection device (15) therefor, for giving warning if the helicopter tail approaches too closely the ground or an obstruction. The warning device comprises a height-finder (11) with a transmitting/receiving antenna (26) mounted at the helicopter tail to produce a height-finding beam backwards and obliquely downwards. Height signals are processed by computing means (12) to determine the sink rate of the tail and in dependence upon this sink rate and the instantaneous height, a warning signal is initiated if this corresponds to a predetermined relative relationship. The higher the sink rate the greater is the height at which the warning signal is initiated and vice versa.
In the preferred arrangement the beam is directed substantially along or parallel to the axis of the mechanical protection device (15).

REFERENCES:
patent: 3250121 (1966-05-01), Schwartz
patent: 4027838 (1977-06-01), Barnum
patent: 4058710 (1977-11-01), Altmann
patent: 4293840 (1981-10-01), Hadari

Affiliated with

Also associated with

Rating

Warning device for helicopters does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Warning device for helicopters, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Warning device for helicopters will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-912094