"Dan" wrote in message
oups.com...
It doesn't happen that often, but it did last night. I am trying to
remember if it is always left, and actually I think it is. It is NOT
the same airplane. Had the problem in an Archer, Arrow, and Comanche.
- probably my technique.

Could I be unintentionally doing something with the rudder on
touchdown?

My guess is that it is your sight picture that is the problem.

You have ruled out wind. You have ruled out the equipment, since it happens
on different planes.

I think you must really have the nose pointed to the left, because that is
the direction the airplane is really going. That means what you think you
are seeing with the direction of the nose is wrong.

If while sitting in the left seat, and you are rolling straight down the
runway, if you look at the nose and observe where the spinner is, it looks
like it is off to the right. Bingo. There is your problem.

You have to look down the offset parallel line of the cowling. If the
eyeball in your head is18 inches off to the left of the center of the
airplane, you need to be looking at a spot on the cowl that is 18 inches to
the left of the crankshaft, and lining that point up with the end of the
runway. Remember to look far down the runway, of course.

Try it; I think it will help.
--
Jim in NC