To date we have replaced a total of 107 HAPI flywheels since they went out of
business back in the late 80's. Not all were cracking, many just saw the
writing on the wall and took care of the potential problem before it became a
serious issue in flight. HAPI made another type that was a steel
The 1835 Hapi on my KR had a 4 hole aluminum flywheel, and it too was
very close to failing when I discovered it while changing out the
alternator which had gone TU.
Question,,why is TU considered a bad thing? I always thought it was a
good thing...
Mark Langford wrote:
> And if it has an alum
And if it has an aluminum flywheel, check out the two photos at
http://www.krnet.org/misc/HAPI_flywheel/050917111m2.jpg and
http://www.krnet.org/misc/HAPI_flywheel/050917111m.jpg . This was on Jim
Hill's HAPI engine, and it appears to be a matter of seconds away from
coming apart. Steve at G
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