My experience is that if I can't trap a .002" tapered Starrat feeler gauge between the
rotor and the casing before tightening the bearings, I won't get usable compression
with any reasonable weight oil. That translates to .001" clearance for a well
centered rotor. The only rotors I've ever see
Russ writes:
About the Paul Eastman horn's valve tolerance, Kendall wrote "... they were
at .003", about the same as Holton. ..."
Is that a radial measurement?
At what tolerance does a valve's inability to seal (with a film of a 'normal'
oil) become problematic?
Russ Smiley (an engineer, but n
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