Steve had me send my 69mm 1045 German forged steel crank to Ken Shawoosch (
Spelling of his last name may not be correct, but the pronunciation is correct
) , early in the 1990’s to have my crank deep drilled and tapered. He said that
they will break within 10 hours of any prop strike. Mine was
It was likely the worst type of failure mode of a crank shaft! They were
lucky that none of the broken pieces or debris hit the windshield at the
time of this event!
Dr. Hsu
On Mon, Mar 4, 2024, 2:36 AM Adam Deem wrote:
> It was a Sonex with an AeroVee VW engine, not sure what the root caus
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