Inability to keep the RW centerline during TO

[sammy 2]

Hello, I purchased the PA 31T and use it in P3D v4

The only problem I encounter with it is to try to keep the RW centerline during TO.

Using the rudder pedals, I generally cannot control correctly the central axis and go outside the RW before take off

Is it a way to get a better stabilization using FSUIPC 5?

Thanks for your help

Sammy

 

[Bob Scott 7,720]

Try dialing back the P-factor in P3D--it's way overdone, and a very common cause of direction control problems on takeoff.

Regards

 

[sammy 2]

Sorry

what do you mean dialing P-factor?

Regards

[Bob Scott 7,720]

P-factor is the effect of inducing yaw because the downward-moving prop blade has a higher angle of attack than the upward-moving side, so the thrust produced by the two blades is asymmetric, and makes the plane yaw to the left (hence every new student hearing "right rudder!  right rudder!" in his ear from the instructor).  P3D and its predecessors overemphasize this effect.

There is a slider in the P3D realism settings that allows you to reduce this effect.  I recommend you try about 50% for starters.

Regards

[jmdriskell 178]

The P-factor introduces your feet to the rudder pedals on the take off roll, especially in a tail drager.  Additionally, if you cobb (apply quickly) the power in a high performance aircraft, stand by for a hard left turn.  The lesson here is to apply the power smoothly at the start of the take off roll.

 

Jim Driskell

[sammy 2]

I have set P-factor to 50 %

Is it necessary to set use autorudder ?

[jmdriskell 178]

Don't use autorudder.  I feel its necessary to get the feel of the simulation by using rudders as well as the other controls.  Watch your needle and ball during turns to keep the AC in a coordinated turn, rather than a skid. 

 

Jim Driskell