Resolution

Picked up a Great Planes Super Stearman kit that was partially built. In the kit as designed it had three pieces of 1/8 plywood glued together to make a 3/8's joiner. The kit was missing the ones for the top wing which are straight so it makes it easy to reproduce. Question is would the three 1/8 pieces glued as called for be stronger or would one 7 ply 3/8 piece work just as well? I have material to go either way just wanted to get some other opinions.

Thanks!

quorneng

Provided the grain goes the right way 3 x 1/8" 3 ply will be stiffer than one 3/8" 7 ply.
3 x 1/8 should have 6 laminations with the grain across the joint. 7 ply will only have 4.
Of course this does assume your glue is as good as that used by the ply manufacturer!

solentlife

Adding to Q's reply ... if you use PU or Epoxy glue and make sure all 3 pcs are pressed together while setting - it should be stiffer and possibly stronger than the single 3/8 piece.