>Paul,

>Still assuming I will be testing the turbo-compound idea I've got some rough
>drawings done on how to directly bolt and sandwich a  multi-rib pulley,
>between the  engine counter weight and aluminum starter gear flywheel.  The
>vibrational dampers and steel plate to catch the sun gear shaft would then
>attached to the Al. starter gear flywheel.  Usually a clutch plate is
>attached to it and the unit mounted on racing engines.


>Looking at this configuration and thinking of Tracy's unit, both would have
>to be mass balanced in and of themselves or they would throw the engine out
>of balance right?  That means all bolts, rubber donuts pulleys, spacers etc.
>have to go in their exact positions.

>For your info Dave Garber bolted up the Bell 47  3:1 gearbox directly to the
>engine counter weight with no vibrational dampening at all.


>Doug Fir

Hi Doug,

Just as a reminder, if you add belts between the engine and the prop
like it sounds from your description you will need to remove the prop
each time you need to refresh the belts. One of the major recip
manufacturers does this with a belted alternator setup and it has
historically been a monumental PIA as the engine compartment heat
rapidly degrades the belt material. I would suggest if at all possible
belt your input to the H2O pump end as Paul has shown in some of his
renderings.                Dave M



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