Date: 12/31/1969 Views: 7636
Date: 12/11/2007 Views: 4996
Date: 04/13/2015 Views: 30154
Date: 08/23/2023 Views: 797565
12 more plies, (3 at a time), were laid up on the top side. That's an 18 ply layup! 1 BID is about the same thickness as 3 plies of thin model aeroplane cloth. Y10-09-30