X-Mozilla-Keys:                                                                                 
Finn Lassen wrote:

Taxi-ing. Just a few petty details before I schedule a FAA inspection.
However, I'm leaving for a 3 week vacation in Denmark in 2 days. 

BTW, no cooling problems on 95F days while taxi-ing around. Water and oil
easily below 90C (194F), usually around 85 - 87C.  It's only when I shut
down that it heat soaks and water reaches temperatures a bit above 100C.
(Yea, my engine monitor displays in C). No problems with easy restarts,
though. It's funny hearing those Lycomings on the field turning and
turning before they can start. I just pull the choke, hit the starter
button and the engine is running!

Still running without the airbox, though. Need to put it on and check
mixture. I'll probably also add an air filter -- it's like Sahara at my
airfield (RRF) -- getting sandblasted each time a helicopter takes off or
land or a plane starts.

I do have what could be called a vibration problem: at engine RPMs lower
than 1800 - 2000 there is a lot of vibrations - probably airplane
skinresonances., but no doubt initiated by the gearbox and/or prop.

Even with my simple muffler, I'm told that the engine is relatively
quiet. Haven't had it much above 4000 RPM, though. Can't hold it with the
brakes.

Finn

Finn you need to fix those vibrations. What is happening is the
thrust from the helical sun gear is pounding on the end of
the E-shaft. Take that box out and send it back to Ross for
an installation of a thrust bearing to take the helical gear
loads. If you don't the thrust bearing in the front of the 
engine will eventually be destroyed.

Paul Lamar
 
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