Scarf Joint
04-28-2006, 07:16 AM
#1
Scarf Joint
I have a set of plans for a 39" wingspan 1/2A Schoolyard Citabria from RCModeler. The wing has a front and back spruce spar 1/8" x 1/4" that are located first on the plans, then the ribs slip over the top of them. Each wingtip is suppose to be up 7/16" for the dihedral.
This leaves a long scarf joint to be made at the center.
How do I go about making this scarf joint? It feathers out so much I am not sure how to go about it and still hit the right angle or produce a good fitting seam all the way down it.
If I had a disc sander maybe, but how to I go about cutting or sanding this so it meets up with the other one nice and flat at the glue joint, and its important because that is what holds the dihedral angle and all the wing strength.
I thought about making two seperate wing panels with a center section but being so small its really not a good idea to go chopping for a pair of ply wing joiners like I am used to with larger models.
I only have basic hand tools, except for a small dremel table saw and thought about setting up an angled fence, but not sure even how to go about that.
Any suggestions are welcome.
This leaves a long scarf joint to be made at the center.
How do I go about making this scarf joint? It feathers out so much I am not sure how to go about it and still hit the right angle or produce a good fitting seam all the way down it.
If I had a disc sander maybe, but how to I go about cutting or sanding this so it meets up with the other one nice and flat at the glue joint, and its important because that is what holds the dihedral angle and all the wing strength.
I thought about making two seperate wing panels with a center section but being so small its really not a good idea to go chopping for a pair of ply wing joiners like I am used to with larger models.
I only have basic hand tools, except for a small dremel table saw and thought about setting up an angled fence, but not sure even how to go about that.
Any suggestions are welcome.
04-28-2006, 08:47 AM
#3
RE: Scarf Joint
The sanding block isnt the problem, its how to produce the angle and the feathered section so everything comes out right. I've tried to sand a feathered stick before and having a hard time with it comming out flat, square and at the proper angle. I guess this is where I need help.
04-28-2006, 08:57 AM
#4
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RE: Scarf Joint
Use one of these:-
http://www2.towerhobbies.com/cgi-bin...?&I=LXG876&P=7
I reckon it's my most used building tool.
It's great at getting a square, flat face at exactly the right angle and definitely makes things like stick building much stronger because the fit is so much better.
-David C.
http://www2.towerhobbies.com/cgi-bin...?&I=LXG876&P=7
I reckon it's my most used building tool.
It's great at getting a square, flat face at exactly the right angle and definitely makes things like stick building much stronger because the fit is so much better.
-David C.
