so Im installing an electric trim in the RV7. id like a switch on the control stick rather than the rocker switch supplied. There is very little information on the Ray Allen electric trim I have included. Does it protect from a runaway trim condition...seems not if you have a short to ground...if a runaway trim occurs is there sufficient elevator authority to overcome it at full trim? from the Ray Allen FAQ see below.
"Can a RAC actuator "runaway" and travel uncommanded?
No. Although RAC actuator have position sensors that feedback information to our indicators, there is no electronic connection between the sensor and the electric motor. The only way to get movement out of a Ray Allen (or a MAC) actuator is for the pilot to manually switch on power. Our REL-1 or REL-2 relay failure will not cause a runaway trim.
Some cautions about using any relays (including our REL-1 and REL-2) to control our actuators. First is that the relay, not the pilot, is controlling yor trim actuator. Second is you are controlling the relay. These relays are activated by a ground signal so a short to ground will lead to actuator movement. Make sure the wire leading from your switch to your relay is not shorting to ground!"
anyone had one stuck at full trim and has anything to comment on? cheers
"Can a RAC actuator "runaway" and travel uncommanded?
No. Although RAC actuator have position sensors that feedback information to our indicators, there is no electronic connection between the sensor and the electric motor. The only way to get movement out of a Ray Allen (or a MAC) actuator is for the pilot to manually switch on power. Our REL-1 or REL-2 relay failure will not cause a runaway trim.
Some cautions about using any relays (including our REL-1 and REL-2) to control our actuators. First is that the relay, not the pilot, is controlling yor trim actuator. Second is you are controlling the relay. These relays are activated by a ground signal so a short to ground will lead to actuator movement. Make sure the wire leading from your switch to your relay is not shorting to ground!"
anyone had one stuck at full trim and has anything to comment on? cheers