Originally Posted by
n85ae
Tailwheel Caster Angle:
Even if the tailwheel is unlocked, if the caster angle of the pivot is correct,
THEN the airplane will will land perfectly normally ... Since the correct
caster angle will make the tailwheel straighten right out.
It would only ever have a tendency to make the airplane turn, if the
caster angle is incorrect.
So I would assert that if an unlocked tailwheel is causing the plane to
go off course, then the caster angle of the tailwheel is incorrect.
The exception to this is if you are countering a strong crosswind on the
ground with the tailwheel, then it unlocks and rudder alone cannot keep
it straight.
Jeff