Careful here. That paper was published in 1920!

OK, wood hasn't changed much, but what adhesive are they using? I didn't see
that mentioned.
I'm under the impression that modern epoxy (like West Systems) is stronger
than the parent wood .
That would make a laminated beam a much better idea than this study seems to
show..

Anybody know anything about this?




"cmyr" wrote in message
...
In my effort to learn/remember/practice correct building
procedures,I monitor several wood aircraft design sights. In the
emerauders group,much discussion about using a wingspar that was built
and purchased by another builder. The Emeraud spar consists of 2
laminated built ip beams,w ply intercoastals, and boxed front and rear
w/ply. The spar in question was made with vertical grain wood, and
laminated with the grain perpendicular relative to the wing chord, I
believe the spar caps and laminations should have grain approx.
parallel to the wing chord. If anyone has a definitive answer that may
even prevent an accident go yo yahoo groups,emerauders