Onetrack
Rigga - From an engineering viewpoint, square sections have vastly increased strength over round sections, when it comes to load-carrying capacity.
Is that true? Most of the super structures built today use round tube over box section, including the new rooves over Wembley stadium and Wimbledon, as well as the 2012 Olympic stadium. I'm not an engineer, but if square section is stronger, why don't all helis have box setion tails
TTB