electric trim tab actuator

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Includes: Highlander, Escapade, Summit and SuperSTOL.

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Re: electric trim tab actuator

Postby smiley » Tue Feb 24, 2015 11:38 pm

so my question is why add the electric trim if you seldom use it? Not making fun of anyone here just wondering if the wiring, weight, switches are worth the effort?
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Re: electric trim tab actuator

Postby Jack L » Wed Feb 25, 2015 5:29 am

smiley wrote:so my question is why add the electric trim if you seldom use it? Not making fun of anyone here just wondering if the wiring, weight, switches are worth the effort?


Good question. Reliability was the biggest reason for me, there are numerous reports of broken Bowden cables so this seemed like the best way to go. I did not weigh the Bowden cable but the electric trim installation is very light and I would be surprised if it weighed more. I also like the idea of having the position display on my panel.

Everyone will use their trim differently and some Just Aircraft models may require it more than others. On some other models of aircraft I have flown if you didn't trim there was a lot of weight felt on the controls, so much that it could almost be dangerous not to use the trim.

If I were to build another aircraft I would still go with electric trim.

Jack
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Re: electric trim tab actuator

Postby Av8r3400 » Wed Feb 25, 2015 9:31 am

Since Skyraider and Highwing are both gone now, has anyone found a source for a fiberglass blister faring or is everyone just making their own?
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Re: electric trim tab actuator

Postby MarkZ » Wed Feb 25, 2015 9:31 am

Simple is good.
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Re: electric trim tab actuator

Postby ransomrocket994 » Mon Feb 15, 2016 11:55 am

I looked and looked but didn't find anything I really liked, so I just made my own
Alex Coonan
#395 SuperSTOL/Lycoming O-235
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Re: electric trim tab actuator

Postby Clark in AZ » Sat Jan 04, 2020 11:59 pm

Bringing back an old post. Just wanted to add my pics to the thread. Nothing new here, I too drilled a new smaller hole above the stock one and then cut away the unneeded material. Got the tab filed to final shape. After determining the center position on the servo I attached the clevis and ran the servo with a 9 volt battery to it's limits in each direction without binding. Works great.

It was mentioned earlier in the thread about adding a washer to increase the thickness of the tab. I think since that post the factory went to a thicker tab because mine is exactly the right width to fit the clevis perfectly. It is plenty strong as it is now.

Clark
Attachments
Tirm Tab - 01 - 1024x576.jpg
Before trimming...
Tirm Tab - 02 - 1024x576.jpg
After...
Building SuperSTOL Kit 512
Cave Creek, AZ
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