RE: Determining balsa stiffness

From: Tim Goldstein <timg_at_ktmarketing.com>
Date: Fri, 13 Jan 2006 17:06:26 -0700

Luis,

My program is really just a porting to a stand alone program of work that
Don S. had on his website. I have since modified the equations slightly to
make it match my real world testing more accurately in regard to thicker
sheets of wood. But to the point of your inquiry, the program does take
deflection input. It is not as a linear measurement, but as a load value. To
get the value you apply a vertical force to the balsa sheet with it standing
on end as a beam on top of a gram scale. You watch the rise in force and
take the reading as it plateaus and before the sheet of wood explodes (that
is what really nice really stiff sheets do when over stressed). I don't
remember where exactly this originated from. It may be in the Maxwell indoor
balsa book or it may be from Bernie Hunt or both or neither.


Tim
[Denver, CO]
Indoor balsa wood & supplies
Now carrying Carbon Plate, rod, tube, and strip.
www.F1D.biz

Indoor flying info
www.IndoorDuration.com
 
Received on Fri Jan 13 2006 - 16:06:33 CET