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Cutting multiple angles on balsa stick build ups?

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Old 12-16-2012, 02:32 PM
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HP^Matt
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Default Cutting multiple angles on balsa stick build ups?

Getting back to the modeling roots and scratch building from plans again. I'm interested in the ways that others are cutting the multiple mitre/angle cuts on the diagonals of their stick framed parts. I'm marking and cutting out side the lines with a band saw or Zona saw and sanding to sneak up on a good fit. I can get perfect fits, but it is very time consuming. Is there a better way?

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Old 12-16-2012, 03:28 PM
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Default RE: Cutting multiple angles on balsa stick build ups?

I measure with a protractor, then cut on my tablesaw. Pretty much what you do.
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Old 12-16-2012, 06:20 PM
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Default RE: Cutting multiple angles on balsa stick build ups?

I've stick built 1/2" thick frames [and thinner] by just laying the stick to be cut over the longerons, marking for the cut with an Xacto knife, then just using a razor saw to make the cuts. If you can't trust your eyes for a vertical cut, then just use a vertical guide to set the saw blade against as you make your cut.
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Old 12-16-2012, 06:32 PM
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Default RE: Cutting multiple angles on balsa stick build ups?

Thanks for the replies guys! I was really hoping for some new fangled super duper easy ....... just kidding. I just seems to take so much longer than it did 15yrs ago.


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Old 12-16-2012, 08:21 PM
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Default RE: Cutting multiple angles on balsa stick build ups?


Quote:
ORIGINAL: HP^Matt

Thanks for the replies guys! I was really hoping for some new fangled super duper easy ....... just kidding. I just seems to take so much longer than it did 15yrs ago.


Matt
Laser cut sides that look like a built-up stick structure..
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Old 12-16-2012, 11:11 PM
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Default RE: Cutting multiple angles on balsa stick build ups?


Quote:
ORIGINAL: HP^Matt

Thanks for the replies guys! I was really hoping for some new fangled super duper easy ....... just kidding. I just seems to take so much longer than it did 15yrs ago.


Matt
If I make a cut that isn't absolutely perfect, I glue it in anyway then pack the gap with fine balsa sawdust and hit it with CA.
Once I finish the control surface or fuselage side, then I surface it with an 80 grit sanding disk that is mounted in my drill press. Set the table for a "squeeze fit" to just take a very light cut and the glued up pile of sticks comes out looking like it was machined.
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Old 12-17-2012, 04:20 AM
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Default RE: Cutting multiple angles on balsa stick build ups?

I mark them, cut them with a scroll saw, and finish them to the line on a 6" dia. disc sanding table, after that I glue everything together with thin CA. Next I pull the work from the table and run a corner glue joint with medium CA in every corner and kick it off. I don't ever worry about the excess CA on the balsa because the way I sand flat surfaces and fuse sides is like cheating its so easy. I place 6 or 7 sheets in a row of 9" x 11" 180 - 220 grit sand paper on a flat surface like glass from an old sliding glass door with 3M 77 spray adhesive. I make sure not to allow any of the sand paper to overlap at all, then I work the control surface, stab, or fuse against the table instead of using a sanding block against these items. this type of sanding will take everything down so fast and true, you just won't believe it. I guess I have been doing this for 20 years or more and I have done it on stuff all the way up to 70 % airplane size with the same results. Here is a just glued picture and a couple more just a little while later.

Bob
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Old 12-17-2012, 05:48 AM
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Default RE: Cutting multiple angles on balsa stick build ups?

118" span of stick built glory! I do as you do- cut and sand for fit. Takes forever... but worth it!
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Old 12-17-2012, 06:14 AM
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Default RE: Cutting multiple angles on balsa stick build ups?

I've been contemplating one of these:

http://www3.towerhobbies.com/cgi-bin...&I=LXG876&P=ML
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Old 12-17-2012, 08:44 AM
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Default RE: Cutting multiple angles on balsa stick build ups?

This is what I have been using and I think it works great. http://www3.towerhobbies.com/cgi-bin...?&I=LXFCE0&P=7
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