user9253
Joined: 28 Mar 2008 Posts: 1938 Location: Riley TWP Michigan
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Posted: Wed Apr 15, 2015 5:34 am Post subject: Dual Control Stick Trim Switches Without Relays |
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Joel Graber designed and posted a circuit on VansAirforce that controls a trim servo motor using
Ray Allen G205 SPDT stick grip switches mounted on pilot and copilot control sticks.
No relays are required. A PDF version can be download:
http://tinyurl.com/Trim-Circuit
Joel Graber has used this circuit in his RV-10 for over 600hrs.
In case of a runaway trim caused by a stuck switch or suicidal copilot, the opposite direction
button can be pressed and held until the fuse or breaker can be pulled.
I do not know if anyone else has thought of this wiring scheme before or not,
but I thought it both simple and ingenious. Even the Ray Allen company thinks that relays
must be used for 2 control sticks.
Joe
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_________________ Joe Gores |
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