I installed Vans Flap System in my RV-8 to control
motor. It lets me hit the switch to move the flaps to the
position instead of having to hold the switch down the entire time.
The tips here will be useful to other RV builders and others
installing electric flaps.
initially fit the flap motor without the wings on. I had just
WD-806 Flap Actuator Weldment installed. This let me move the
motor full length up and down. Later, after the wings and
were installed, I only had to adjust the up and down stops.
took me a while to get the hole in the F-860C-L aft arm rest the right
size and shape to allow the motor arm to move through without scraping
the edge. I hooked the motor up to a trickle charger to run
and down. Normally I advise against using a trickle charger,
I figured that since it was just the motor, and no electronics
involved, it wouldn’t hurt. A spare battery or power supply would be
better, but I didn’t have one, so I used the charger. I don’t
know how long you can run the motor without it overheating, so I went
slowly. I ran it
up or down until I could tell it was going to
scrape, then I stopped. I had to pull the motor out, and
more off of the F-806C-L. I figured the time I spent
filing and smoothing allowed the motor to cool.
I located the
electric control for the flap system sensor on the forward side of the
bulkhead, where it will be covered by the F-876PP-L aft cabin
cover. Two screws and locknuts hold it in place.
In the older kits, we had
to drill the holes in the floor
for the bottom of the F-876 aft cabin covers.
I wanted to ensure there would be no
interference with the flap motor as
it traveled full up and down. So
a piece of 1/8” thick aluminum to the farthest inboard spot on the
motor. Then I set
the F-876-L into position and
clecoed the top holes. I
could then push
the bottom of the F-876-L in or out as required until there was no
with the motor. Then
when I removed the
1/8” spacer, I knew I had at least that much clearance between the
It looks like the new,
match drilled kits have the holes in
the floors already drilled. Before
install the platenuts, you should check to ensure your motor clears the
F-876-L. It would
be easy to move the
holes a little if required.
ran the wires under the floor, through the F-807 bulkhead, then under
the baggage compartment and back forward through the F-807
bulkhead. I cut a slot in the F-834B-L baggage floor so I can
slide a rubber grommet in place to keep the wire from
suppose the wire could be run up through the floor underneath the flap
system motor, and the same kind of slot and grommet used when the floor
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