On 01/10/10 08:03, John Passaneau wrote:
.... are the boom is one of the trickiest parts. As an example if you
used a
1" square boom and modeled it as a 1" diameter wire there would be a
problem. They are not equal.

Here is a little tool for designing practical square section spines:
http://vk1od.net/calc/tstl.htm .

Owen