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Old Feb 23, 2012, 12:02 PM
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robert14's Avatar
Emmen, Netherlands
Joined Aug 2008
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Servo holes in bagged wings

Hi guys.

I have a question to all the people who build their own bagged wings. How do you make the holes in the wing for the servo's? I used to just bag the wing and then cut out the bottem skin.. Scratch out all the foam and glue in the servo. On my last wing I tried something else.

Before bagging I already cut out the hole (square) for the servo. I wrapped the piece of foam that comes out of the wing in clear packing tape. Then I waxed the tape and put it back in.

After bagging you can see where the peice of foam is. Cut it open at the bottem skin and you can just take out the piece of foam that is wrapped in tape. In this way I get a nice clear servobay in the wing.

But is this the easyest way or are there different ways to do it?

this is how it looks like after taking out the foam:


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Old Feb 23, 2012, 12:24 PM
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DLGjunkyard's Avatar
Canada, ON, Puslinch
Joined Apr 2010
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I have thought about doing that but what I find is when I router the pocket out after bagging the wing I end up leaving a very thin wedge of foam at the bottom of the pocket. With your method you must have a looser fit. The small wedge at least keeps the servo from rocking.

I just made this little jig and use my dremal to cut out the pocket. It takes literly 2 minutes and I get a very tight fitting hole.
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Old Feb 23, 2012, 12:31 PM
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United States, CA, Tehachapi
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How do you cover the servo holes after the install when you router out the holes? Do you just put tape over it? I like having the skin to put back over the servo because it looks better.

Brandon
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Old Feb 23, 2012, 12:39 PM
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Fly2High's Avatar
United States, NY, Plainview
Joined Aug 2005
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Most will cut the skin off with an exacto knife and peel it away from the foam before routing.

I do not have a template but that is what I do:
1. Using a pin, verify there is sufficient depth for servo.
2. use knife to cut perimeter and then peel off skin from foam.
3. using dremel, 'route' a test piece of foam to verify depth. Then route wing.
4. clean up corners with knife.
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Old Feb 23, 2012, 12:45 PM
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Canada, ON, Puslinch
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Quote:
Originally Posted by bwill6 View Post
How do you cover the servo holes after the install when you router out the holes? Do you just put tape over it? I like having the skin to put back over the servo because it looks better.

Brandon
The most recent one I did I made another jig that was about 2mm wider and only routered out the skin and then the servo is taped with double sided tape to that cover plate for a flush fit.There is a shelf for the cover plate to sit on.

I will get a picture up loaded shortly
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Old Feb 23, 2012, 01:15 PM
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Some do the peeling off of the skin so that they can re-stick it to the top surface to reinforce it.
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Old Feb 23, 2012, 01:25 PM
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Emmen, Netherlands
Joined Aug 2008
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I always take out all the skin, all the way to the top skin. If the servo is thinner then the wing I'll glue in some balsa to strengthen it. I used the dremel before but with thin wings I'm always scared that i cut the top skin
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Old Feb 23, 2012, 01:34 PM
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Canada, ON, Puslinch
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Here are a few pics. Kind of hard to see the ledge or lip I referred to with all the kevlar fuzz etc

This one had the servo removed so you can see where it removed some of the wedge of foam from the base.
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Old Feb 23, 2012, 05:49 PM
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gopherhunter's Avatar
Franktown, CO. USA
Joined Mar 2009
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$0.02

My method using a router...
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Old Feb 24, 2012, 06:08 AM
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UK, Isle of Anglesey, Holyhead
Joined Jun 2010
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I love that idea of the lip! I wish I had thought of that before I did my wing!
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