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Per:

It is unlikely that there is any connection between the left-turning
tendency on the ground at taxiing speed and the problem experienced in
flight - so these anomalies can probably be attacked as separate issues. The
fact that the airplane wants to go left on the ground and in the air is
probably an unfortunate coincidence.

The turning tendency during taxi (if it occurs at typical taxiing speed and
not during the takeoff run at power) is most likely caused by mis-aligned
main gear. It doesn't take very much mis-alignment to make the airplane
difficult to keep straight on the ground. Re check that the hubs are as
perfectly parallel to each other as you can get them and to the center-line
reference of the airframe.

The in-flight problem has to be due to mis-rigging. Hopefully, the
mis-rigging is in the ailerons, flaps, rudder or all three, because they can
be properly adjusted. If the fixed flying surfaces are incorrectly aligned,
the problem is more difficult to correct.

If properly aligned, the Lancair flys quite straight so you must carefully
recheck all control rigging per the construction manuals.

Good luck,

Dan Schaefer

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