Re: wing spars witc C grain at front?

From: Mark F1diddler <f1diddler_at_yahoo.com>
Date: Sat, 07 May 2011 16:55:06 -0000

--- In Indoor_Construction_at_yahoogroups.com, "izgo" <izgo@...> wrote:

>
> Its not so easy because for a tapered wing spar I need to cut them from different wood sheets, Or use a think one so you can cut from both directions.


No need to waste real spar stock for a proof-of-principle experiment. Just strip a dozen true A/C sticks into perfectly square 1/16" or 3/32". Rig up a stick holder and a ruler to measure deflection. Hang weights on other end of stick. Let stick rest. Rotate 90* to catch the other orientation. Test with same load and observe any difference in deflection rate or overall deflection. I this did a long time ago, but everyone should do it for themselves, since the same thing gets questioned time and again.
Received on Sat May 07 2011 - 09:55:12 CEST