Originally Posted by Latintan
My recollection is that originally, Plies were defined for their individual strength. As the materials got stronger, the ply strength ratings were maintaining while the layers were reduced- Always maintaining the same strength.
That's correct. Unfortunately it gives many people a false sense of security.
They may wear through to the second ply thinking they have 4 more to go when actually they"re on the last one.
Mel Asberry..DAR since last century
A&P/EAA Tech Counselor/Flight Advisor
Specializing in Amateur-Built and Light-Sport Aircraft
North Texas (8TA5)
RV-6 Flying since 1993, 172hp O-320, 3-Blade Catto (since 2003)
Legend Cub purchased 12/2017
FRIEND of the RV-1
Eagle's Nest Mentor