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  5. Weird behaviou at rolling... Just before takeoff.

Weird behaviou at rolling... Just before takeoff.

Scheduled Pinned Locked Moved PA-28R Arrow III
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  • L lennsch

    sorry for my english... :-(

    can somebody please try to set max payload and max fuel? for me it didn't happen any more with full weight. maybe this helps?

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    sdvpilot
    wrote on last edited by sdvpilot
    #41

    @lennsch Thank you for your suggestion. I found that at max fuel and weight the tendency to yaw to the left on takeoff does not occur unless you hold the nose down until reaching speeds well above 70 knots. However very little right rudder is required to remain on center which is also not realistic. I'm guessing that Just Flight developers have tweaked settings as much as possible given the present limitations of the sim. Pitch stability in a climb also seems better at gross weight making it easier to trim for a constant rate of climb but there is still room for improvement. Never the less I do think that this is by far the best GA single engine prop aircraft available for MSFS and I really do enjoy flying it.

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    • RetiredMan93231R Offline
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      RetiredMan93231
      wrote on last edited by RetiredMan93231
      #42

      Unlike many small GA aircraft, such as the Cessna C152 and C172, the Piper PA28 does not have springs on the nosewheel steering. The nosewheel is directly connected to the rudder pedals, and any rudder deflection you apply will also turn the nosewheel in that direction. During the takeoff roll some right rudder is needed to counteract the normal engine induced left yaw, but the nosewheel needs to remain as straight as possible to maintain the steering track on the runway centerline... This can make the rudder and nosewheel work against each other, especially at the higher ground speeds just before rotation. To minimize this cross controlling, and improve the centerline tracking during takeoff, try this technique used by the old tail dragger fighter pilots...

      • Turn on Cockpit Tool Tips in MSFS so you can see the exact amount of rudder and elevator trim being set.

      • Before beginning the takeoff roll set the Rudder Trim to 3.0 degrees right, and the Elevator Trim to about 2.0 degrees Up (depending on your loading). This will apply the correct amount of right rudder to counter the engine induced yaw during takeoff and climb out, without also turning the nosewheel.

      • After leveling off at cruise altitude, return the Rudder Trim to 0.0 to eliminate any side slip and allow maximum cruise speed to be achieved.

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        Lemny
        wrote on last edited by Lemny
        #43

        That could not be the reason, because at higher taxi speeds the nose wheel have much less impact and you have to be really slow to effectively turn the plane hard. Why should it suddenly gain so much traction after 70 knots? As Delta mentioned, seems to be a problem with sim at the moment and the PA has been impacted hard by it.

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        • S sdvpilot

          @lennsch Thank you for your suggestion. I found that at max fuel and weight the tendency to yaw to the left on takeoff does not occur unless you hold the nose down until reaching speeds well above 70 knots. However very little right rudder is required to remain on center which is also not realistic. I'm guessing that Just Flight developers have tweaked settings as much as possible given the present limitations of the sim. Pitch stability in a climb also seems better at gross weight making it easier to trim for a constant rate of climb but there is still room for improvement. Never the less I do think that this is by far the best GA single engine prop aircraft available for MSFS and I really do enjoy flying it.

          L Offline
          L Offline
          lennsch
          wrote on last edited by
          #44

          @sdvpilot said in Weird behaviou at rolling... Just before takeoff.:

          unless

          thx for testing!

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          • B Bilbosmeggins

            I have the same issue. It doesn’t matter how gently I feed in the power, or how dainty I am with rudder input. I hold the line perfectly well until about 60 knots, then it’s like getting a sudden puncture. Probably affects 90% of takeoffs. And, yes, I’m set to “Modern”.

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            dadgametime
            wrote on last edited by
            #45
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