WIng Filletts

WIng Filletts
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WIng Filletts - 6/3/2003 4:39:46 PM

propnut28

Posts: 26
Joined: 5/16/2003
From: Fayetteville NC
Status: offline

I have a small plane I'm building and want filletts around the wing saddle. How can I make them lite and evenly shaped on both sides.

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WIng Filletts - 6/3/2003 5:11:55 PM

ED STEFAN

Posts: 1262
Joined: 11/12/2002
From: BONAIRE, GA, USA
Status: offline

Is this wing glued to the fuse, or is it removable?

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ED -- AMA 20464 -- A plane is 1000+ different parts all flying in very close formation.

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WIng Filletts - 6/3/2003 10:16:19 PM

propnut28

Posts: 26
Joined: 5/16/2003
From: Fayetteville NC
Status: offline

The wing is simi-perminant. It bolts on and will be removed for maintanance or repairs. I thought of using a spoon to put on some lite filler than sanding it. Whatever I use it will have to be the same or nearly the same hardness as the surrounding balsa.

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WIng Filletts - 6/3/2003 10:47:33 PM

MinnFlyer

Posts: 19353
Joined: 4/22/2002
From: Willmar, MN, USA
Status: offline

You can make a base from 1/64 ply and glue it to the fuse with triangle stock. Then, use your spoon method to smooth some lite filler over it.

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Mike B.
AMA# 42400 www.gettingairborne.com

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WIng Filletts - 6/3/2003 10:56:41 PM

ED STEFAN

Posts: 1262
Joined: 11/12/2002
From: BONAIRE, GA, USA
Status: offline

I've had good luck gluing 1/64th ply to the fuse saddle with the wing attached. Be sure to use wax paper, or plastic wrap between the wing and saddle area so as not to permanently glue the wing to the fuse. Let the ply stick out from the fuse aprox 1/8 inch. This will make a 90 degree support for the filler. The filler can be epoxy mixed with micro-balloons, model-magic, or several other combinations that you can search for on RCU. I prefer the epoxy and micro-balloons due to the ease of shaping and sanding. To shape, I dip a finger into a bottle of iso. alcohol and run the fillet into shape. Requires very little sanding after it sets up. Hope this helps.

_____________________________

ED -- AMA 20464 -- A plane is 1000+ different parts all flying in very close formation.

(in reply to propnut28)

Post #: 5

WIng Filletts - 6/5/2003 9:06:22 AM

PilotFighter

Posts: 1978
Joined: 10/9/2002
From: Houston, TX, USA
Status: offline

I like the 1/64 ply and filler method myself. In the past, however, the filler has drawn up, (shrunk) pulling the fillet up. It generally isn't a problem at the front of the fillet where it is small. But near the trailing edge of the wing, where the fillet is its broadest, it pays to keep the 1/64 ply taped to the wing until the filler is completely dry. If that make any sense.

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