No problem. Wanted to add that if people are willing to tolerate a momentary contact toggle switch rather than the more convenient rocker switch, you can get a mil spec switch with the same wiring. The Aircraft Spruce part number is MS35059-27
dan
No problem. Wanted to add that if people are willing to tolerate a momentary contact toggle switch rather than the more convenient rocker switch, you can get a mil spec switch with the same wiring. The Aircraft Spruce part number is MS35059-27
dan
Giving this another bump and another update for those with the Skystar grey colored trim switch. I went flying two days ago and the electric trim only worked one way. No biggie, drop the flaps to 1/2 and the plane was trimmed nicely. Landed and back at the hanger things worked again. I had bought a new switch and bezel from Kitfox a few months back and swapped the old for the new. Afterwards I disassembled the old switch and found a bunch of debris in the housing and a bit of arcing. My advice to anybody running the old type, gray colored switch is to swap in a new switch of your choice.
IMG_2412.jpg
Dave
KitFox 6 Taildragger
912 ULS
Whirlwind Prop
Garmin G3x
All around nice guy
Update on this for anyone looking for the company making this actuator, it appears it has changed names: https://www.actuator.com/products/
Turns out the rod end they supplied is not the best quality and is very sticky so I was looking for a replacement on aircraftspruce but neither HM nor Aurora has a part as compact as what is supplied. The closest match is the GMM-4M-470 AURORA BEARING but its likely I will just have to use the sticky ball end unless I want to replace the whole actuator.
Is there some form of slippage or clutch to allow the motor to continue to spin when the actuator hits either limit? Reason I ask is I don't use the trim indicator. I just turn around and when the horizontal stops moving I release the button.
S7 STi O-320 currently flying
The ball screw just freewheels at each end of the range of motion, there is no clutch. When the actuator hits the end of its range of motion it simply stops extending/retracting while the motor keeps spinning at the same RPM.
Last edited by 3kdscf; 07-29-2022 at 03:56 PM.
Congratulations on disassembling your actuator and getting it back together, I ended up having to buy another. Just a warning, my problem turned out to be the rocker switch despite the fact that it appeared to be OK when checking with a voltmeter. The voltmeter read +12V with the actuator disconnected but the when the actuator was connected, the voltage was zero - this is because the bad rocker switch had very high resistance. I ended up replacing my rocker with a good old mil spec toggle switch and it has been working fine ever since.
I also have a series 6 with 7 FWF that has been flying for two years
Hi John,
I also have a series 6 and my rocker switch failed after 90 hours of operation. I simply replaced it with the much more robust MIL spec switch from aircraft spruce. I now have 400 hours and have had no troubles since I put in the MIL spec switch. Its a SPDT momentary contact toggle switch, wired the same way as the rocker switch. The order number from aircraft spruce is MS35059-27.