Rich S. wrote:
"wright1902glider" wrote in message
oups.com...

I've been entertaining the idea of building a Chanute-Herring glider
from alternate wood like doug fir or possibly yellow poplar. Anyone
got specs on yellow poplar? Didn't see it listed in AC43-13.


Harry...............

All I have is this table, copied from one of the old Emeraude newsletters:

Essence Spec. Grav. Tension (psi)
Yellow Poplar .44 8600
Alaska Cedar .46 9900
Douglas Fir .43 to .50 9000 to 10900
Fir .40 to .42 8400 to 9400
West. Hemlock .45 11000
East. White Pine .37 7600
West. Red Cedar .34 7100
Sitka Spruce .41 9400
Port Orford Cedar .43 10200
East. Cottonwood .43 7700

Rich S.


Try this--it's the whole ball o' wax---(Forest products Laboratory wood
handbook,

http://search.netscape.com/ns/boomfr...e.com%2Fsearch
Sorry 'bout the long url----just google the title..Jerry