Do multi engines face the torque effect? What about jets?

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    $\begingroup$ By "torque effect" do you mean p-factor? Or some kind of rolling effect due to a high power engine? $\endgroup$
    – Ron Beyer
    Commented May 14, 2017 at 1:36
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    $\begingroup$ @RonBeyer to be fair, if the OP understand the difference between torque and p-factor, he would not be asking this question. $\endgroup$
    – kevin
    Commented May 14, 2017 at 12:20
  • $\begingroup$ I know that the torque effect is the left-turning tendency an aircraft has. Don't know what p-factor is (the Wikipedia explanation is a bit complicated). Any videos? $\endgroup$
    – TayE
    Commented May 14, 2017 at 13:11
  • $\begingroup$ With all engines operating or one or more engines inoperative? $\endgroup$
    – J W
    Commented May 16, 2017 at 17:16

1 Answer 1


Maybe you mean the p-factor. If both engines are rotating clockwise, the plane yaws to the right. If one rotates clockwise, the other counter-clockwise, the effect cancelles out and the plane flys straight.

  • $\begingroup$ What about the effect of the two engines operating at different speeds? Is that significant? $\endgroup$ Commented May 20, 2017 at 23:16
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    $\begingroup$ @TannerSwett I think so. The p-factor is directly proportional with the speed of the prop. Now, if one engine operates at a different speed, the plane will yaw into the direction of the faster engine. (Apart from the fact that the thrust is applied asymmetrically) $\endgroup$ Commented May 22, 2017 at 15:22

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