Flap switch on stick (amps & relays)

[justinmg]

I would like to parallel wire the panel flap switch with switches on a Ray Allen grip. The grip switches are 5Amp rated.

Would I be able to wire these directly, or would I need to use a relay.

If I need a relay, can anyone recommend one.

Many thanks.

[JoeBlank]

Check out the following from Vans:

http://www.vansaircraft.com/cgi-bin/...uct=flap-board

This should allow you to put the switch in the stick.

[N402RH]

Van's has a Flap Relay that is designed for this.

P/N: ES Flap Control Board

Rob Hickman
N401RH RV-4

[Ironflight]

This is really easy to build with an automotive relay - I'm sure someone can post something better then the napkin sketch I have....you probably DO need something other than directly wiring to the switch though.

Paul

[Rosie]

Please forgive the crude drawing but I used MS_Paint (and drawn from about a 9 year memory in my head...)

Here is what I have on my control stick that runs only a ground through the stick to the momentary switch.

Click the picture to enlarge Rosie

[dan]

Rosie's two-relay setup is exactly what I have. Still workin' great after lots and lots of hours & cycles.

When I bought a handful of cheap relays at Radio Smack, I figured...this is an experiment. Wonder how long they'll last. So far so good. 1300 hours and no relay issues (yet?).

From Rosie: I'm at 2600+ hours (thousands of cycles I'm sure) and no problems here...

[briand]

How many amps does the actuator draw at approx. full load?

This ? got me thinking:

Anyone know of anyone who tested the load on their flaps in real life flying? If it hasn't been done, I might borrow a strain guage/load cell from work when my plane is done but I bet its been done. You would probably want the results with solo and gross weights and two flaps settings at their respective max extend speeds at least.

[Steve Sampson]

If you want to wire up your own you could use relays to be seen at http://211.217.75.113/Promotion/PDF%...0Solenoids.pdf go to page 41 and then look for part number 619-760. This is probably a link to the UK catalogue. Farnell is Newark in the USA?

If you are not happy with electrics the VANS part would perhaps be easier.

PS From memory the motor draws a max of around 2 amps but please correct me if someone knows better. I had it fused at 5 and it never blew in my -9a.

[dan]

Originally Posted by briand

How many amps does the actuator draw at approx. full load?

I don't know exactly how much mine draws at full load, but I can tell you the motor drew 800 mA with no load.

My flaps are wired with 16 AWG and a 10A fuse to protect the wires. Could probably get away with smaller (lighter) wire & fuse, but I wasn't sure what the loaded current consumption would be.

[Rick6a]

DWG OP-10 suggests a 5 amp breaker for the flap motor and R4 indicates the wire was 16 gauge now 18 gauge.