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Building Tips and technical articles. => Building techniques => Topic started by: Patrick Rowan on September 21, 2006, 06:45:35 PM

Title: Stack Sanding Ribs
Post by: Patrick Rowan on September 21, 2006, 06:45:35 PM

I'm going to stack sand the ribs for my next project.
I'll use 2 plywood ribs. 1 center, 1 tip rib.
Do you keep the trailing edge straight in the stack?

What other tips can anyone give me.

Thanks

Title: Re: Stack Sanding Ribs
Post by: RC Storick on September 21, 2006, 06:52:57 PM

I have done it both ways LE lined up or TE lined up. However the way I like to do it is centered. I sand both set of ribs in the stack. It lessons the angle. After sanding I separate every other on to inboard and out board. I hope this makes sense. I rough sand on a belt and finish with 220 and a block.

Title: Re: Stack Sanding Ribs
Post by: Joe Peters on September 24, 2006, 05:41:46 PM

Hey Patrick!
The trailing edge is kept even with the balance of the patterns kept symmetrical to each other. This is true for both D & C Tube configurations.  Remember my AQUILA?  I used the NOBLER Center and tip Ribs and made patterns from sheet brass.  I still have the Brass Pattern Ribs.   I added a rib to each side and re-spaced to make for a 4" longer wing.   All my ribs were 1/16.   All my Free Flight wings were made this way, only they had Flat bottoms.   I made ALL the Ribs in one stack alternating ribs assigned to each wing half and keeping the thicker ones for the inboard panel.   This saves a little time and theoretically gives a tiny bit more lift to the inboard wing.   If this isn't of any value, please burn.   You can get continuously threaded 4-40 and other size rod to bolt thru the Rib Stack.   What else you got?   I usually don't add my 2 cents .....but for you....Well you know?   Stay safe & God Bless,  Joe ::)

Title: Re: Stack Sanding Ribs
Post by: Jim Thomerson on September 30, 2006, 06:13:35 AM

I have one of the Great Planes wing jigs that uses two 1/4 rods through the ribs.  I use a 1/4 brass tube sharpened on one end to cut holes in the rib blanks and then bolt them together with 1/4 inch bolts.

Title: Re: Stack Sanding Ribs
Post by: Dave Heinzman on October 01, 2006, 04:51:32 AM

Hi Pat,
I have a Windy video for the Miss Ashly where he shows stack sanding the ribs and the rod method for building the wing. If your interested I can mail them to you. Let me know

dave heinzman

Title: Re: Stack Sanding Ribs
Post by: Patrick Rowan on October 02, 2006, 10:05:26 AM

Good advice all. Thanks

Dave, I had the ribs 99% finished before I saw your post. Windy dose make good tapes. Your ok, no matter what Wayne says.  ;D

Title: Re: Stack Sanding Ribs
Post by: Tom Perry on October 02, 2006, 10:24:22 AM

Patrick,

I guess there isn't any best way.   #^  I think a lot depends on the design and where and how you want the spar(s) to go.

For instance if you want the spars parallel to the leading edge or centered etc.