Materials Information
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From a message on the Allegro-Lite Group Mark Drela posted the following material properties.

Material rho
g/in^3		 sig11
ksi		 tau12
ksi		 E11
ksi		 E22
ksi		 G12
ksi
Spyder 0.60 0.02     5.5  
Balsa 4lb 1.05 1.0 0.2 200   10
Spruce 25lb 6.56 5.0 1.0 1700   90
Carbon Fibre 0 26.22 200.0 10.0 20000 1700 800
Carbon Fibre +/-45 26.22   100.0 6400 6400 5200
Glass Fibre 0 31.20 200.0 10.0 10000 800 400
Glass Fibre +/-45 31.20   100.0 3200 3200 2600
Kevlar 0 23.00 200.0 10.0 15000 1200 600
Kevlar +/-45 23.00   50.0 4800 4800 3900
Monokote 2 mil 20.00     400 400 150