Originally Posted by
guzzijohn
Ok, someone inferred 100oz/inch might work. That appears to equal approximately 23.4kg/cm. So I should be looking at a servo rated 25kg/cm?? Another bit I don't get is servo actuation rates. Planes, cars, and fast boats probably need fast reaction but my beasty doesn't. That said how does the reaction time translate to my situation? Thanx GJ
One thing to remember about the required torque. The formula for determining the torque required includes not only the forward speed of the control surface but the degrees of deflection. If all you do is swing it 5 degrees to either side your torque requirements will be a lot less than it would be for 15 degrees.
And along those lines, the racing sailboat crowd generally limits their rudder throw to 30-35 degrees side to side. It seems the drag imposed by the rudder when above 30 degrees hinders the boat more than the turning force benefits it. Maybe Hydro can add his experience from the power boat side of things.