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Date: Sat, 07 Nov 1998 16:49:06 -0600
From: Snowbird <snbird@ibm.net>
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Subject: Re: sideslip landings: Help!
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Mark Burkley wrote:

> >Mark, maybe I don't understand this; if you're taking off with a
> >left crosswind, you should have full left aileron at the start
> >of the takeoff roll, and you should need *less* right rudder than
> >usual or even left rudder, because the crosswind from the left is
> >countering the normal left turning tendencies caused by spiralling
> >slipstream, p factor etc.
 
> I don't fully understand what's happening either.  The way it was
> explained to me is that the wind is catching the tail and weather
> cocking the plane *into* wind, hence the need for more rudder. 

OK, I'll buy that especially if there's a headwind component
so the whole fuselage isn't being pushed to the side.

But you know, the last time I was out in a really strong wind,
which was almost a direct left crosswind, I was running out of left
rudder trying to keep the plane on the runway while taxiing--
right rudder definately had it going off to the right.  I was
taxiing in little arcs (drift to the right, apply brake to get
back, drift to the right).  I asked the CFI who was with me to
try it, and he wound up with the same control inputs.  This was
a brisk 25g35 wind in a Citabria FWIW and the controller watching
us taxi had this "you guys are nuts" tone in her voice but once
it got rolling it wasn't bad and once we were up in the air it
didn't matter.  I let the CFI take that landing though (2nd tailwheel
hour)

So I guess I don't think about what's "supposed to" work too
much any more but just put the controls where I think they'll
work and change something if that isn't working.  But I haven't
yet run out of things to try in the limited set of planes I've
flown (Pipers, Cessnas, Grummans, Citabria, Decathlon) unless 
the wind was pretty strong.

> It's not strong at all, which is the strange bit.  Only a few knots
> will cause this.  Taking off in the other direction is no problem.  We
> tried a reversal one day when the wind was almost 90 degrees to the
> runway and it was much easier to T/O with the wind from the right.

Bottom line is, I rather wonder if it might pay to have the rigging
checked in the plane you're flying -- if you depress the rudder 
pedals, does the rudder deflect an even amount to each side?  Does
the plane fly straight with the ball centered and no rudder input
at cruise speed?

Snowbird

