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  1. S

    J36 - J35 Bulkheads

    I know for a fact that the J30 and J29 have balsa cored main bulkheads. I've worked on both. What's funny is a lot of J29 owners will swear their bulkhead doesn't have balsa in it. They are mistaken. It was common for TPI to build them that way back then.  I would investigate your J36 a bit more. 
  2. S

    J36 - J35 Bulkheads

    You would be 100% mistaken. My 29 has a balsa cored bulkhead as well as all the 30's. The 30 used the main bulkhead from the 36.(obviously cut down) 
  3. S

    J36 - J35 Bulkheads

    The bulkhead is balsa core between two skins of glass. The plywood(or veneer) is purely cosmetic. 
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