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Anyone Else Have This Problem??????

Posted:
Mon Aug 18, 2003 2:03 am
by Simviation2003
Hello Fellow Aviator's,
Can some one tell me why on initional take off, my aircraft yaws from left to right (zig-zag) all the way to nearly lift off?
I don't seem to have the problem in the heavier aircraft i.e 373 747 or Concord, but the smaller planes have you thinking your in a tail-drager (Tailwheel).
I've tried the settings on the joystick and made sure the auto-rudder in the settings is off but to noavail.
Anyone else have this problem???
SV2003
Re: Anyone Else Have This Problem??????

Posted:
Mon Aug 18, 2003 2:29 am
by Smoke2much
It's probably a mixture of P-Factor, torque and your joystick.
P-factor is greater at a high angle of attack, ie with a tail dragger with the tail on the ground.
Re: Anyone Else Have This Problem??????

Posted:
Mon Aug 18, 2003 5:29 am
by PH_AJH
Hi
I recognize the "problem" but in my case it is more something I had to get used to.
Planes (especially powerful small taildragging ones) indeed start moving left or right when you open the throttle, even more so if there is some crosswind. You'll have to compensate using rudder. Now this is what I had to practice; I tend to overcompensate (with a firm twist of my joystick), starting a motion to the other side. Which I tend to overcompensate again etc. There you have your zig-zag.
What works for me is: Don't flick the throttle open all at once, start with say 30% to get moving. twist the stick just a little to stop the motion and keep it steady. Make small adjustments and try not to start a motion to the other side. As soon as the aircraft picks up speed (and the rudder gets more effective) you'll notice you need less rudder input and the throttle can but slammed to full without to much reaction.
Hope it helps.
Cheers
AJ
Re: Anyone Else Have This Problem??????

Posted:
Mon Aug 18, 2003 6:08 pm
by Simviation2003
Thanks Fella's,
I assumed it was common amoungst us all.
Thanks
SV2003