I have trouble steering my homebuilt, which is simular of PA-20 and
suspect the steering springs are weak. Of coarse excessive tension would
be too much stress on the rudder steering yoke. Does anyone know the
correct spring rate for the steering springs on a PA-20?

Don't forget to check your landing gear alignment. It should be toed
*out* very slightly. See deja for past discussions on this topic. You
could also check the caster angle on the tailwheel, in addition to the
steering springs.

Ed Wischmeyer