On Sat, 18 Aug 2007 11:55:13 +0100, Simon Brooke <
[email protected]> wrote:
> in message <[email protected]>, Martin Dann
> ('[email protected]') wrote:
>
> > Looks very nice, but I wooden want one, too heavy,
>
> Good wooden structures have a better strength/weight ratio even
> than carbon composite.
I'd dispute that. Even quite moderate (not especially special) CFRP
could have a strength of around 3000 MPa, with a specific density
about 1.6, so more than 1800 MPa/density (unconventional units, I
admit).
Spruce (pretty good strength:weight - popular in aeroframes, eg
Wright Flyer, Mosquito, Hughes' behemoth) about 75 MPa and density
just over 0.4, that's 190 MPa/density.
What wood do you believe has strength:weight ratio ten times better
than spruce?
regards, Ian SMith
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