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Old 01-15-2007 | 11:39 AM
  #20  
WacoNut's Avatar
WacoNut
 
Joined: Jan 2005
Posts: 6,604
Received 36 Likes on 33 Posts
From: Blanchester, OH
Default RE: Jack Stafford Chipmunk

I have set the wing off to the side and I have the tail feathers sanded to final shape. JSM designs are a stressed skin structure, the skin provides most of the strength of the airframe. The fuse is made up of 2 3/16" sides and 8 formers, the formers have the radius to give the fuselage it's shape. You must wet down the fuse sides to get them to conform to the formers. The #4 and $5 formers are located foreward and aft of the cockpit. The cockpit floor keeps the fuse square while you are bending the fuse sides into position.
I started out by marking all the former locations on the fuse sides and glueing the 3/16" stringer to the top of each side. I also added the fuse doubler at the wing saddle. I then glued former#4 and #5 into position then glued the cockpit floor into position. Once this is dry I can wet the outside of the fuse sides and shape them to the formers then pull the tail togther and glue it in position and add the rest of the formers. This type of construction is a little more time consuming but it gives you a very light and strong fuse that has a nice scale round shape.
Here are a few pics of what I have so far.
Anthony
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