Safety timer for turbine powered helicopter

Details Safety timer for turbine powered helicopter Safety timer for turbine powered helicopter

1987-03-26

1988-04-19

Casaregola, Louis J.

Power plants

Combustion products used as motive fluid

With safety device

244 1711, F02C 700

Patent

active

047380985

ABSTRACT:
A timing device to automatically timing the turbine engine cool-down period for a turbine engine helicopter. The electronic timer is activated when the micro-switch on the engine throttle cable is closed, as the pilot twists the throttle control to the ground-idle position. The timer illuminates a yellow caution light on the helicopter instrument panel to indicate to the pilot that the cooling cycle is in progress. The timer is preset to the specified time limits required by the turbine engine manufacturer for the helicopter. At the end of the cool-down period, the timer deactivates the caution light on the helicopter instrument panel and indicates to the pilot that the cooling cycle is complete and the turbine engine can be shut down.

REFERENCES:
patent: 3691759 (1972-09-01), Scheeren
patent: 4619110 (1986-10-01), Moore
patent: 4638630 (1987-01-01), Martens et al.

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