Method and tractor for towing aircraft

Details Method and tractor for towing aircraft Method and tractor for towing aircraft

1977-04-11

1978-09-12

Song, Robert R.

Motor vehicles

Vehicle trains

Motorized trailer

188112R, 244 50, B60D 700, B60T 802

Patent

active

041130413

ABSTRACT:
A sensing element in the towbar of an aircraft towing tractor continuously measures the traction and pressure forces transmitted between the tractor and the aircraft. An automatic control unit uses the measured values to adjust the traction-effect of the tractor, and/or the braking of the aircraft -- either singly or in combination -- to keep the towbar forces within a predetermined permissible interval. In one operating mode, braking signals generated by the tractor operator actuate the aircraft brakes directly, the tractor brakes being applied by the automatic control unit only if the towbar traction force exceeds the permitted limits. For additional safety, a separate force sensor may actuate an emergency release system to separate the aircraft from the tractor in response to towbar forces outside a predetermined range. For additional safety, a separate force sensor may actuate an emergency release system to separate the aircraft from the tow bar, in response to towbar forces outside a predetermined tolerance range.

REFERENCES:
patent: 2808119 (1957-10-01), Steinman
patent: 3709522 (1973-01-01), Olson
patent: 3955652 (1976-05-01), Nilson et al.
patent: 4007890 (1977-02-01), Bremer et al.

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