Thermal right, land left

Uri Saovray wrote:
Speaking of simple warning devices:
How about a simple hookup to a horn which is activated when the
airbrakes are opened while the towhook is engaged (i.e. open spoilers
during tow)?
A microswitch on the airbrake levers would be the no-brainer part.
What about the towhook? Magnetic sensor? where? How? Other ideas?
Uri

This would be an easy addition to the typical gear warning system, with
the new switch simply over-riding the gear switch. Fixed gear gliders
would need to add a spoiler switch and warning buzzer.

Pilots concerned about warning proliferation could consider using a
voice chip to speak "Spoilers" and "Gear" for the two alerts, instead of
a buzzer. Voice chips are cheap and simple to use these days.
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Eric Greenwell
Washington State
USA