This controls the flap actuator from a normal double-throw toggle switch
Tags:
Comment
makes sense to me. Thanks
P.S. - Bro also was the one who recommended facing the rear of the panel with vinyl, just in case a powered wire became loose... I have seen the immediate effect of a 12v. wire hitting aluminum ground - NOT PRETTY... even if it's fused, I'm more comfortable knowing that it's one less potential problem (good pun there.) I used some cheap leftover "carbon fiber look" vinyl that I had, before I figured out that for anything important, the only way to go was with the "real deal" 3M stuff. So I put my scrap piece to good use!
Plus, the relays are very inexpensive... I think I paid about $10 for the whole setup, not including my time soldering everything up and making a nice little aluminum mount for the relay sockets. It's also very light weight.
Jesse -
I have a couple of reasons... you're right that the actuator is pretty lightweight - I think it draws about 3 amps.
1.) My flap switch is positioned in a place on my panel that is pretty tight. - I wanted it centered to the pilot because I have a single center control stick. DPDT switches are almost 1" wide and I only have 3/4" of room. The only switch I can get in there that has a really good momentary action with a nice sized toggle lever is a "standard" DPST, about 5/8" wide.
2.) This setup was recommended to me by my brother (who is a master electrician) due to it's safety - if either relay or the switch itself shorts out, there is ZERO chance of anything coming back through the wiring. With a single relay, you don't get the same protection depending on which contacts might short out.
Picture:
Why can't you just use 1 reversing switch with 1 relay. I replaced the trim actuator on my jet boat and I use a reversing switch with a fuse. Do the actuators that we have to use pull enough amps that we cant just use a switch? A good toggle switch should be rated for 20 amps momentarily. Not not saying yours is wrong, and I have not done any research on this circuit, just kinda picking your brain.
Zenith Planes & Parts For Sale
Classified listings for buying or selling Zenith builds and parts...
Custom Instrument Panels
for your Zenith:
Custom instrument panels are now available directly from Zenith Aircraft Company exclusively for Zenith builders and owners. Pre-cut panel, Dynon and Garmin avionics, and more.
Zenith Homecoming Tee:
Flying On Your Own Wings:
A Complete Guide to Understanding Light Airplane Design, by Chris Heintz
Transition training:
Aircraft Spruce & Specialty for all your building and pilot supplies!
How to videos from HomebuiltHELP.com
Developed specifically for Zenith builders (by a builder) these videos on DVD are a great help in building your own kit plane by providing practical hands-on construction information. Visit HomebuiltHelp.com for the latest DVD titles.
© 2026 Created by Zenith.Aero.
Powered by
Exlusive online community for active builders and pilots of Zenith Aircraft kits (Chris Heintz / Zenair light airplane designs).
You need to be a member of Zenith Aircraft Builders and Flyers to add comments!
Join Zenith Aircraft Builders and Flyers