"smjmitchell" wrote in message . au...
This test procedure is overly simplistic and may not test the critical
loading condition of the ribs.


I would recommend the test procedure outlined in AC21-3 Basic Glider
Criteria as a more concise and thorough load test schedule. This method
This publication also provides very detailed instructions on how to
mount
and load the rib.


BTW ... is there a web site where you can download
'Handbook of Instruction for Airplane Designers,' Air Corps, U.S.Army (circa
1937)
or are you working from a paper copy.


Is there a place where one could down load this "more concise" manual?
A quick Google didn't turn it up.
===============================
Leon McAtee



"Bob Hoover" wrote in message
om...
Rib Testing

The rib is supported upside down by a jig simulating the wing spars.
The load, consisting of a single mass suitably divided by balance
beams, is applied to the upper edge of the rib (as positioned in the