19 February 2016

Avionics: Flap position sensor.

Van's provides a quick kit for installing a flap position sensor.  The sensor will work great with my GRT HXr EFIS with the two being easily connected.  I already had the Ray Allen POS-12 (available from Aircraft Spruce) as I was planning to replicate an approach recently posted on VAF.


The steel rod that came from Van's was bent during the shipping process, however I happened to have a twin pack of 1/16" stainless steel rod from K&S, part #87131 (which can be found on eBay for less than $4, shipped).  The remaining parts in the kit include the Molex micro-plug, pins, plastic tube for bushing, screws and nuts.


The pushrod is cut and bent to plan (I should have put a ruler in that image - the pushrod is about 8 inches long).


The F-01450F Flap Motor Channel has two holes in its web specifically for mounting the sensor.  After removing, drilling a hole in and reinstalling the WD-1013A Flap Crank to accept the pushrod, everything is installed.


Here is a video in operation, flaps down (or is it up?).  About 12 seconds, stop-to-stop.


And now the sensor awaits its mating to the EFIS.  A future post describing that process is forthcoming.

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