Date: 12/31/1969 Views: 12337
Date: 12/31/1969 Views: 7826
Date: 12/31/1969 Views: 5234
Date: 08/23/2023 Views: 857694
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