On Mar 18, 12:24 am, Ernest Christley wrote:
wrote:
Actually I'm interested also to know if any other designs besides BD
aircraft utilize wing spars that are made of aluminum tube.

So if you know of any I'd like to know what they are.

Dyke Delta uses a welded truss made 4130 tube...each section's
crossmembers were of a different size.


Ah but in terms of stress/strain, a truss is closer to
an I-beam than it is to a single tube.

Unless of course it is a very peculiar truss.

--

FF