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Author Topic: Half ribs  (Read 2211 times)

Offline Fred Quedenfeld jr

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Half ribs
« on: February 05, 2016, 03:13:38 PM »
How do you install the half ribs like in the Hobo or fzed twister?
I tried to pin to the bottom spare but they split
do you install both spars ans leading edge than twist the half ribs inplace?
thanks
Fred Q
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Offline Mark Scarborough

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Re: Half ribs
« Reply #1 on: February 05, 2016, 03:23:11 PM »
That is in fact pretty much how I have done it, built the wing with the full ribs,, then rotate the half ribs in place, a drop of CA in three places finishes the deal
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Offline Steve Helmick

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Re: Half ribs
« Reply #2 on: February 05, 2016, 04:33:15 PM »
I've made half-ribs as individual pieces (top & bottom, but both the same, being a symmetrical aerofoil). Uses less balsa, you can use the frags from cutting the full ribs, and comes out lighter. If you wanted to, you could make them with a bit excess on the outer surface and sand them flush with a long sanding board...with a chord-wise motion.  y1 Steve
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Offline john e. holliday

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Re: Half ribs
« Reply #3 on: February 05, 2016, 08:16:55 PM »
I used the same ply templates that I used for the regular ribs.  Yes you put them in after main wing is framed up.   Not that hard and I didn't break any ribs.
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Offline Tim Wescott

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Re: Half ribs
« Reply #4 on: February 06, 2016, 10:26:20 AM »
What Mark said.  If the ribs are cut reasonably accurately then you just rotate them into place and glue with your favorite.
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