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Building Tips and technical articles. => Building techniques => Topic started by: RC Storick on May 16, 2006, 11:56:01 AM

Title: Wing tips
Post by: RC Storick on May 16, 2006, 11:56:01 AM

The wing tip for this build are done just as plans state. First make a tip plate and then add a block top and bottom. Next tack it to the wing and sand to rough shape. After you are satisfied with the shape cut it loose form the wing. Separate all the pieces and using the finger method make a line around the parameter. Carve out the excess balsa.

How important is the step you ask? Well it started out 19 grams of dead weight and after hollowing it ended up 7 grams. 12 gram savings X 2 tips is almost a ounce.

After gluing the tips together finish sanding the inside smooth. The light airplanes are sanded just as good on the inside as the outside!

FIT-FIT-FIT!! Finish start with the first piece of wood cut!!

(http://www.stunthanger.com/images/TipBlocks.jpg)

Title: Wing tips finished
Post by: RC Storick on May 16, 2006, 01:28:57 PM

Here is what they are suppose to look like sanded in.

Title: Re: Wing tips
Post by: Doug Moon on May 21, 2006, 09:27:27 PM

That seems like an odd place for the tip weaight box.  I say that because it will be ahead of the CG.  Seems like it could cause trim issues.  Bob Gieseke always taugh me to put the tip weight as far out the wing as possible.  He puts his in the wing tip, and in line with where the projected CG will end up.  I put mine at the tip of the wing prior to tips inline with the CG.

By the way.  That is really nice work on those tips.  I used to do it that way as well.  Have you tried the Tom Morris method?  Really cool way of building tips.  Goes very fast.

Title: Re: Wing tips
Post by: RC Storick on May 21, 2006, 10:59:32 PM

Quote from: Doug Moon on May 21, 2006, 09:27:27 PM

That seems like an odd place for the tip weaight box.  I say that because it will be ahead of the CG.  Seems like it could cause trim issues.  Bob Gieseke always taugh me to put the tip weight as far out the wing as possible.  He puts his in the wing tip, and in line with where the projected CG will end up.  I put mine at the tip of the wing prior to tips inline with the CG.

By the way.  That is really nice work on those tips.  I used to do it that way as well.  Have you tried the Tom Morris method?  Really cool way of building tips.  Goes very fast.

The weight box is right on the hypothetical CG

Title: Re: Wing tips
Post by: Doug Moon on May 22, 2006, 06:38:01 AM

OK.  I thought it looked forward that is all.  My mistake.