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Old Aug 14, 2002, 08:19 PM
smokinjoe is offline
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The thing I hate the most! or A couple questions on mounting servos in wings


Thanks for letting me get that off my chest!

Here are my 2 simple questions:

1. If you use the shrink sleeve wrapped servo method, what glue sticks to the shrink wrap? I tried epoxy, but that did not stick at all. I did clean the shrink wrap with alcohol before applying the epoxy.

2. Does anybody know of a good source for a SMALL offset (right angle) phillips screwdriver, that will let you remove servo control horns after the servo is glued in the wing?

Answer to these question would make life GREAT.

Joe

PS I tried the Hobby Lobby servo mounts, and they ALMOST worked! Too big, too high, even after cutting them down.
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Old Aug 14, 2002, 08:25 PM
Luke Mitchell is offline
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Don't know about the offset screwdriver; but, try probond glue for the servo.
Old Aug 14, 2002, 08:32 PM
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My preference is for wrapping servos with wide masking tape, or in a pinch, clear packing tape, then gluing in with clear silicone sealant. Lay a 6" piece of dental floss (mint flavor) down in the silicone and put the servo on top of it. This can help if you ever want to get the servo out.
Old Aug 14, 2002, 09:18 PM
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Clear silicon works great, but I disagree about the dental floss. I find the cinnamon flavor works much better
Old Aug 14, 2002, 10:16 PM
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What about hot melt glue? This appears to have enough strength to easily hold in the servos, and can also be removed relatively easily?
Old Aug 15, 2002, 12:30 AM
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Hot glue is really brittle, and will fail at the most inopportune time (ask me how I know). If you use shrink wrap over the servo, scuff it up with some sandpaper before you epoxy it and it will work just fine.

I just scuff up the servo and glue them in with a mixture of epoxy and microballoons, about the same consistency as toothpaste. Strong enough to hold the servo in the wing, but you can still bust ‘em out if you need to. If you have the room, put down a layer of fiberglass in the servo bay, let it dry overnight, and glue your servos in the next day.

Pete
Old Aug 15, 2002, 01:58 AM
Grapeape is offline
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Chemically Corrected
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Heres another one, wrap the servos in saran wrap and put some 5 min epoxy in the hole, enough to ooze up the sides a bit. Now put the wrapped servo in and let the epoxy kick, pull it out and remove the saran wrap. Now you have a very tight fitting servo bay and you can put some masking tape around the servo and install it with a dab of silicone or goop. Easy to remove by cutting the masking tape.
Get a really cheap set of jewelers screwdrivers, they can be bent with a pair of plyers.
Last edited by Grapeape; Aug 15, 2002 at 02:05 AM.
Old Aug 15, 2002, 05:41 AM
GordonTarling is offline
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Those who advocate wrapping a servo with tape before gluing it in have obviously never had to remove one from a fragile model! The tape sticks to the servo case just as much as the glue itself! My now preferred method is to use thin, low-temp, shrinkwrap on the servo, rough it up a little and then de-grease it and use Pacer Zap-a-dap-a-Goo to glue it in. To get the servo out, you simply slit the shrinkwrap and remove the servo.

As for removing that small screw which holds the servo arm on after the servo is in place - it's almost impossible in most models, so try to plan things so you don't have to!
Old Aug 15, 2002, 02:57 PM
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Quote:
Originally posted by GordonTarling
Those who advocate wrapping a servo with tape before gluing it in have obviously never had to remove one from a fragile model! The tape sticks to the servo case just as much as the glue itself!
Not if you use the blue low tack masking tape!
Old Aug 15, 2002, 06:29 PM
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Great Answers!


Great Ideas for tough problems.

Thanks to all. I like the one about bending a cheap jewelers screwdriver.

Joe
Old Aug 15, 2002, 08:03 PM
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Dymond sells their servos with a mount set that allows it to be placed flat in a wing....
Old Aug 15, 2002, 08:59 PM
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Dymond servos


But...

Are the mounts meant to be screwed into the mounting surface?

That doesn't work too well for wings.
Old Aug 15, 2002, 11:13 PM
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- PFM or Marine Goop to attach the servos. Silicone works well too, but I only like this when the servo is restrained from lateral movement (like in a foam recess).
- If you have to remove the arm, you screwed something up. I have never had to remove the servo arm after installation (in about a dozen models).. That said, if you have to, cut the shrink, do what you have to do, and reshrink and glue it back in.
..a
Old Aug 16, 2002, 01:15 PM
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Servo Mounts


I have used the Hitech AH56307 servo mounts in a foam wing (The Art Hobby Fantasy III wing comes preped for it) Except for the mounting screws which were hard to screw in the first time, they really work well. You can unscrew the cover the servo can now slide up & you can get at the servo arm screw very easily. If I had a built up wing I would insert a piece of foam trim to fit the wing & then use the servo mount.

Works for me, but your mileage may vary.

Al Sharog
Old Aug 16, 2002, 06:14 PM
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Be VERY careful using "zap a dappa goo" or goop for gluing in servos.. If you use to much, when it cures, it'll warp obecchi sheeting.. ask me how I know.


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