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- Path: sparky!uunet!zaphod.mps.ohio-state.edu!magnus.acs.ohio-state.edu!slc3.ins.cwru.edu!agate!linus!linus.mitre.org!mitre.org!mmcevill
- From: mmcevill@mitre.org (Michael A. McEvilley)
- Subject: Re: Foam Cores
- Message-ID: <1992Aug20.194631.18577@linus.mitre.org>
- Sender: news@linus.mitre.org (News Service)
- Nntp-Posting-Host: mcevilley-mac.mitre.org
- Organization: The MITRE Corporation
- Date: Thu, 20 Aug 1992 19:46:31 GMT
- Lines: 35
-
- In article <BtAEB2.7v5@usenet.ucs.indiana.edu>
- ntaib@silver.ucs.indiana.edu (Iskandar Taib) writes:
- > In article <1992Aug19.181318.29546@linus.mitre.org> mmcevill@mitre.org
- (Michael A. McEvilley) writes:
- > >In article <1992Aug18.214800.1782@iex.uucp> djones@iex.iex.com writes:
- >
- > >> 3) Using leading and trailing edge 1/16" balsa sheeting with cap
- > >> strips and then covering with Monokote.
- >
- > >Will save some weight, some guys actually cut out the foam between the
- cap
- > >strips resulting in a 'built-up' looking foam wing. Too much cutting
- will sacrifice strength and will require reinforcement of the wing along
- the area where the wing spar would go.
- >
- > Hmmmm...
- >
- > How about arranging these cap strips so you have "geodesic
- > ribs"? Once you cut out the foam in between it'll be far
- > stiffer than if you use simply back-to-front capstrips.
-
- Geodesic what!?!?!?! Had to look that one up (and who said RC was
- non-educational)!
- A diagram of what you are implying would still help.
-
- Actually, what I was referring to when I said "Too much cutting..." was
- cutting out foam between the cap strips within the first 3rd of the wing
- (from the root). This is where the stresses during high-G maneuvers is
- maximum, and I've seen one guy rip his wings off on two different planes
- because he went to the extreme cutting out foam (trying to save every last
- 1/4 ounce of weight). He finally learned his lesson and now only cuts out
- the foam on the outboard half of the wing.
-
-
- Michael
-