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Old Nov 09, 2012, 10:53 AM
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helijamie's Avatar
Canada, BC, North Vancouver
Joined Jun 2011
10 Posts
aileron servo mount


I am new to the DLG scene and have built one sailplane so far. How are people mounting their aileron servos? I have carved the wells out of the bagged wings and am ready to mount. It is a TopSky.

I have seen Paul Naton's videos but I just don't know about low tack masking tape. I am temped to just glue them in although removal will be destructive.

I am using good quality Hyperion servos and I think them unlikely to strip.

Thanks for the input.
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Old Nov 09, 2012, 11:14 AM
In F3J size does matter!
roydor's Avatar
Joined Nov 2006
908 Posts
Hyperion 09 servos have been known to have some potentiometer issues in the past and as you know "sh@t happens". This is true for ALL servos and brands.
The epoxy over the tape method works well and gives you the possibility of maintenance which is important.
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Old Nov 09, 2012, 11:31 AM
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Joined Jan 2008
4,681 Posts

I use the masking tape almost exclusively. Wrap the servo meatly, drop in a dab of epoxy and press it home.

Other methods that have worked for me include a close-fitting pocket with the servo flush with the bottom surface of the wing. Package wrapping tape over the opening holds things just fine. I have also buried servos pretty deep (for top drive, for instance) and then I fill the opening with sheet balsa of appropriate thickness, and then package wrapping tape over that.

I have also used bathroom caulk. Just squeeze in a good amount, press the clean servo home and wipe off the excess. The caulk peels off the plastic if there is a need to remove the servo.

Yours, Greg
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Old Nov 09, 2012, 03:09 PM
Spy's sappin' my thermal!
Chris Sutton's Avatar
Seattle, WA
Joined May 2009
137 Posts
I like wrapping the servos with heatshrink tube instead of tape, then gluing in with epoxy. PVC heat-shrink (the type usually found over batteries) is better than polyolefin (the usual electrical stuff), but since I can't find PVC locally, I've used the polyolefin stuff without trouble. I've even used Gorilla Glue successfully to glue heat-shink wrapped servos into the fuse.

I've heard stories of masking tape getting gooey in the heat, but seeing as you live in BC, that's probably not much of a concern.
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Old Nov 09, 2012, 03:57 PM
a.k.a. Matt Nelson
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North Tustin, CA
Joined Oct 2008
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Also - don't worry too much about messing up some foam if you are faced with removing a glued-in servo. I've done that before, and sure enough have torn our a fair bit of foam with the servo.

The good news is that you can easily "replace" the missing foam by carefully filling the voids with a super light mix of microballoons and epoxy, or even superlight spackle, using a piece of plastic or cardboard as a custom putty knife to get it in there nice and smooth. Then insert the replacement servo as usual. You'll never notice the difference.

repeat as necessary
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