OK, I am ready to buy my wood (plans built Hatz Classic). No problem, just order some 1/4" birch plywood right? Well, not so much. Look at the webpage and what they have is Birch and Poplar Plywood. It is aircraft grade MIL-P-6070 (I which I have found it really isn't so much about the wood as it is about the glue).
There is a huge difference in birch and poplar, but some things I have found make it sound like all birch ply made in the USA are combined with either poplar (or Basswood, which is even worse... eg lighter, but not as strong). Can someone tell me any info on this? The guy at the wood supplier (supposedly the best guys in the business) say the birch poplar is the way to go, but I would just like some more info... like why the poplar, is that the specifications when it says birch plywood? Should I go with imported ply? Is the imported stuff really all birch? Is it better?
I have spent many hours combing through wood density tables, mil spec docs, grading specs, but still can't come up with a benefit to mixing poplar with birch, other than maybe cost and weight, both of which are fairly negligible. So please tell me there is a wood guru on here who can help me out!
Tre'