<DIV style="font-family:Arial, sans-serif; font-size:10pt;"><DIV>Hi everybody,</DIV><DIV> Does anybody know how to calculate the amount of torque on one Square foot of a flap going through the water at a 45 degree angle at a given amount of speed ?</DIV><DIV> </DIV><DIV>Brian</DIV><DIV> </DIV></DIV>