"Wilbur Hubbard" wrote in
anews.com:

Poor Skippy!!! It sounds like your amateur attempt at alignment is
doomed to failure.

Why?

Because there is a lot more to alignment that just centering the shaft
in the log. A perfectly centered shaft can fail to be perfectly
aligned with the transmission output shaft/flange.

IOW, if the two flanges that bolt together are not perfectly parallel
both top to bottom and side to side and everywhere else, when the
propeller shaft is centered in the log there will be a terrible
vibration set up as the two flanges will bind and loosen as they
rotate. The only way to get them perfect is by using two dial gauges,
one for each flange and as you rotate them with perhaps an 18th inch
of space between them (in neutral) by hand both gauges must not move
more than a blonde hair.

Sounds to me you are doing the job only halfway, Skippy.


Wilbur Hubbard

BullPucky!
Its simple enough to get them dead in line with a feeler gauge between
their faces. Simply rotate the two flanges together while checking the gaps
at four points seperated by 90 degrees. (the measurement points rotate
with the flanges). If they neither tighten or loosen on the gauge finger
through a whole turn the angular alignment is 'dead nuts'.

Of course you must get the prop shaft and transmission output shaft centres
dead in line as well but you certainly dont need two dial gauges.

BTDT including replacing the shaft log which involved fabricating a new GRP
tube for the bronze log tube to fit in and glassing it in place.
--
Ian Malcolm. London, ENGLAND. (NEWSGROUP REPLY PREFERRED)
ianm[at]the[dash]malcolms[dot]freeserve[dot]co[dot]uk
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