At 12:24 PM 11/2/98 -0600, you wrote: >My flight instructor and I were trying to figure out how much of the >left-turn force (during take-off) was being caused by P-factor vs. >propeller precession vs. engine torque vs. propeller slip-stream. I have >read that most is from the propeller slip stream hitting the vertical >stabilizer.
Hi David. I'm not experienced in the two-tailed coupe, but this is an interesting question. I think you must be right about the slipstream being the cause of the left-yawing on the takeoff roll. There probably isn't any P-factor since propellors usually seem to be facing directly forward in the takeoff roll attitude. You'd get it at rotation, though. There wouldn't be any precession until you rotate, so that's not it either. Engine torque tries to roll the plane, not yaw it, and since it can't roll while on the ground, that's not it either. Well, maybe the left tire has more drag because it's supporting more weight from the left-roll effect? :-) So I guess the only thing left is the slipstream, I'm guessing. Interesting. ----------------------------------- Steve Dold ([EMAIL PROTECTED]) Say NO to useless over-quoting -----------------------------------
<<attachment: winmail.dat>>
