This is the requirement for a roll over bar, as per regs " The structure must be designed to protect the occupant in a complete turnover, assuming, in the absence of a more rational analysis:-" (1) An upwards ultimate inertia force of 3g's ; and (2) A coefficient of friction of 0.5 at the ground.
SO, KR2 of 1000 lbs weight X 3 g's = 3000 lbs, times 0.5 = 1500lbs. force hitting you bar. Then remember that you plane is then sliding backwards over the ground?? so the force is then trying to push the bar onto YOU. ( that's why I have two cables back to the tail bulk head). So, IS can your glass roll over protection strong enough??? Always ask someone qualified, who knows. Phil Matheson SAAA Ch. 20 VH-PKR Australia EMAIL: phillipmathe...@bigpond.com KR Web Page: www.philskr2.50megs.com http://www.vw-engines.com/
