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Old December 14th 05, 02:49 PM posted to rec.aviation.homebuilt
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Default Crankshaft balance

OK. They managed to get things in balance - within one gram.
The only thing was the starter gear with the torsional damper. Because
of the fluid damper it changes - about 5g out max. Does anybody know if

5g is acceptable for a 10" flywheel?



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One gram is darn close for your application. You will notice a
difference when ya fire up the new beast. As for the damper, if it is a
fluid style i can tell you they never repeat while spinning up on a
balancer machine. Temp differences cause the viscious fluid to migrate
differently every time so don't sweat the small numbers there. I am
curiuos, Was this engine a first time run motor and never been into
before? You would think with all the FAA requirments they would dictate
part weights in a new "certified" motor to be closer then 5-8 grams.
I also want to say Jim was very good at reading into the fine print and
giving a great feel of what was trying to be said. I am a little
forward in expressing my views and do sometimes rub people the wrong
way and hope we can get over this feud.

Happy Hollidays all you guys.

Ben