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Full size rib pattern 18 Dec 2017 16:24 #1071

The PDF attachment is five 8.5x11 pages you can print on your printer. Be sure to turn off any page scaling. Check that the rib thickness is 8 inches at the 30% cord line. Cut drawings 2,3,4,5 on the left "copy #" line and then assemble on the horizontal line with a straight edge. Tape everything together and glue to a piece of 1/4 in ply. The ribs do not show the rear cusp of the ribs. The cusp is added when you add the trailing edge doubler.
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Full size rib pattern 04 Jun 2018 17:23 #1110

I'm just wondering, what is the advantage going from a 12M wing to a 13M wing?

Ralph

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Full size rib pattern 05 Jun 2018 10:05 #1111

Hi Ralph,

I can't comment on the Woodstock, but looking at the Windrose information sheet, which details both the 13m and 15m wings, the following is probably true for the 13m Woodstock too:

Higher Aspect Ratio
Larger surface area = lower wing loading
Better L/D
Lower sink rate
Better climb rate

carbon-dragon.ihpa.ie/images/carbon-drag...ation%20Brochure.pdf

Phil.

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