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Inability to keep the RW centerline during TO

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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

 

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

Regards

 

Bob Scott | President and CEO, AVSIM Inc
ATP Gulfstream II-III-IV-V

Sys1 (MSFS20+24/XPlane12+11): AMD 9800X3D, water 2x240mm, MSI MPG X670E Carbon, 64GB GSkill 6000/30, nVidia RTX4090FE
Alienware AW3821DW 38" 21:9 GSync, 2x4TB Crucial T705 PCIe5 + 2x2TB Samsung 990 SSD, EVGA 1000P2 PSU, 12.9" iPad Pro
Thrustmaster TCA Boeing Yoke, TCA Airbus Sidestick, Twin TCA Airbus Throttle quads, PFC Cirrus Pedals, Coolermaster HAF932 case

Sys2 (P3Dv5/v4): i9-13900KS, water 2x360mm, ASUS Z790 Hero, 32GB GSkill 7800MHz CAS36, ASUS RTX4090
Samsung 55" JS8500 4K TV@60Hz,
3x 2TB WD SN850X 1x 4TB Crucial P3 M.2 NVME SSD, EVGA 1600T2 PSU
Fiber link to Yamaha RX-V467 Home Theater Receiver, Polk/Klipsch 6" bookshelf speakers, Polk 12" subwoofer, 12.9" iPad Pro
PFC yoke/throttle quad/pedals with custom Hall sensor retrofit, Thermaltake View 71 case, Stream Deck XL button box

Sys3 (DCS/P3Dv4/ATS/ETS): AMD 7800X3D, MSI MPG X870E Carbon, Noctua NH-D15S, 64GB GSkill 6000/30, EVGA RTX3090
Alienware AW3420DW 34" 21:9 GSync, Corsair HX1000i PSU, 4TB Crucial T705 PCIe5 + 2TB Samsung 970Evo Plus,
TM TCA Officer Pack
, Saitek combat pedals, TM Warthog, TM RS300 FF wheel/pedals, Coolermaster HAF XB case

  • Author

Sorry

what do you mean dialing P-factor?

Regards

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

Bob Scott | President and CEO, AVSIM Inc
ATP Gulfstream II-III-IV-V

Sys1 (MSFS20+24/XPlane12+11): AMD 9800X3D, water 2x240mm, MSI MPG X670E Carbon, 64GB GSkill 6000/30, nVidia RTX4090FE
Alienware AW3821DW 38" 21:9 GSync, 2x4TB Crucial T705 PCIe5 + 2x2TB Samsung 990 SSD, EVGA 1000P2 PSU, 12.9" iPad Pro
Thrustmaster TCA Boeing Yoke, TCA Airbus Sidestick, Twin TCA Airbus Throttle quads, PFC Cirrus Pedals, Coolermaster HAF932 case

Sys2 (P3Dv5/v4): i9-13900KS, water 2x360mm, ASUS Z790 Hero, 32GB GSkill 7800MHz CAS36, ASUS RTX4090
Samsung 55" JS8500 4K TV@60Hz,
3x 2TB WD SN850X 1x 4TB Crucial P3 M.2 NVME SSD, EVGA 1600T2 PSU
Fiber link to Yamaha RX-V467 Home Theater Receiver, Polk/Klipsch 6" bookshelf speakers, Polk 12" subwoofer, 12.9" iPad Pro
PFC yoke/throttle quad/pedals with custom Hall sensor retrofit, Thermaltake View 71 case, Stream Deck XL button box

Sys3 (DCS/P3Dv4/ATS/ETS): AMD 7800X3D, MSI MPG X870E Carbon, Noctua NH-D15S, 64GB GSkill 6000/30, EVGA RTX3090
Alienware AW3420DW 34" 21:9 GSync, Corsair HX1000i PSU, 4TB Crucial T705 PCIe5 + 2TB Samsung 970Evo Plus,
TM TCA Officer Pack
, Saitek combat pedals, TM Warthog, TM RS300 FF wheel/pedals, Coolermaster HAF XB case

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

Boeing777_Banner_Pilot.jpg

James M Driskell, Maj USMC (Ret)

 

 

  • Author

I have set P-factor to 50 %

Is it necessary to set use autorudder ?

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

Boeing777_Banner_Pilot.jpg

James M Driskell, Maj USMC (Ret)

 

 

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