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Subject:Re: Crosswind Takeoff
From:Stan Prevost
Date:Sun Feb 25 18:56:34 2001
Thanks, yall, for all the inputs. The great thing about all the diversity
of opinion is that it stimulates thinking in directions that were previously
ignored.

While advice has been diverse, there have been some common themes:

1. Relax downward pressure on the nose.

2. Use more aileron.

And although this is not specifically the issue I was addressing,

3. At rotation, smoothly transition to a wing-low attitude with the upwind
wheel still on the runway and airplane axis aligned with the runway
centerline, then when fully clear, transition to a wings-level crab.

Now my analysis of 1 & 2.

1. I am not aware of consciously applying downward nose pressure, but I may
have been doing it in my intent to not allow it to come up until I am ready
to rotate. Forward pressure on the control wheel will cause an upward
tailforce and take some of the weight off the mains. It also increases
nosewheel authority when I really need rudder authority to counteract
weathervaning without having the nosewheel tend to make the plane track to
the downwind side. I can see that I probably need to lighten the nosewheel.
A little back pressure on the control wheel will cause downward tailforce
which adds to the weight on the mains, helping them prevent sideskipping.

2. I am sure that I have been way too timid with aileron. I know I have
been using it in an arbitrary fashion without any real sense of control, or
any understanding of what it really does in the crosswind ground roll. If
the plane is trying to go to the right, I should roll in more upwind
aileron. Too much will be indicated by tendency to sideskip to the left or
the downwind wheel trying to lift.

I know I should have mastered all this long ago, but I didnt, and now Im
trying.

Now I just need some good stiff crosswind to go learn to do all this....

Stan



"Stan Prevost" wrote in message
news:t4Wl6.320363$iy3.67850190@news1.rdc1.tn.home.com...
> Hi, yall -
>
> OK, Im not gonna be proud. I have a problem I have never been able to
> overcome, and after practicing T&Gs in 20 kt crosswinds today, I need
help.
>
> I have trouble with directional control in a crosswind takeoff while still
> on the runway. I apply crosswind correction with ailerons (turn toward
the
> wind) and to reduce it as I build airspeed, but I still skitter around.
> With the rudder pedals connected to the nosewheel, I cant put in much
> rudder as long as the nosewheel is still down. I always keep the nose
down
> to reduce lift and keep maximum friction on the mains (and nose) to keep
> from skittering sideways, and briskly bring up the nose when I reach
> rotation speed. One guy said I ought to get the nose up so I can use the
> rudder to keep it straight. Well, straight is one problem, but sideways
> skittering is another.
>
> Same problem Cessnas or Pipers.
>
> Whats the secret?
>
> Stan
>
>
>




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