Gary,
In glider spars, you want need the strength for launches. Grain goes vertically.
See:
http://workshopcompanion.com/KnowHow/Design/Nature_of_Wood/3_Wood_Strength/3_Wood_Strength.htm
Balsa is not listed but you can see the tendencies. Wood is anywhere from 1.5-2x stronger in one direction than the other.
None of this tells use torsional info, but I imagine this is a function of cross-section rather than grain orientation.
Regards.
Mike Kirda
--- In Indoor_Construction_at_yahoogroups.com, Warthodson@... wrote:
>
>
> A debate is raging in our local club. So far the vote is tied. We need your input.
> Imagine two identical motor sticks, same dimensions, same weight, etc. When viewing the motor stick from the side, one is made from "A" grain & the other from "C" grain wood. Which will resist bowing better, which will resist twisting better?
> Thanks,
> Gary
>
Received on Fri Feb 22 2013 - 09:18:58 CET