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I was wondering how the psru would play a role. Be interesting to see how balanced the engine is from the factory. That actually will work out, I want to take apart the psru after 30hours and see how it looks inside. Finn, would you want to balance your prop sometime mid Feb if we rented it? can email me offline. mattboiteau(at)gmail(dot)com
Interesting! That may explain my
difficulty in getting a clear o'scope picture from accelerometer.
Need to first remove any flywheel/engine imbalance that may
obscure prop imbalance.
Finn
On 1/28/2021 12:39 AM, Sboese sboese@uwyo.edu wrote:
Matt,
One cannot balance the prop by placing the balance weights on
the flywheel due to the gear ratio of the psru. I chose to
dynamically balance at the flywheel with the prop removed, then
install the prop, and finally dynamically balance at the prop.
That appears to have given good results for me.
Steve Boese
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How does everyone balance their prop, do
they gain access to the flywheel and add bolts/washers
there like a standard aircraft engine? I'm looking to
balance the prop around X60 (Williston, FL), and I
forget who, but someone said we could rent one nearby?
Had a 301 ss slip joint bellow for the exhaust and it
cracked, which set me back a few months. The end of my
exhaust must have too much vibration, I will figure out
more rubber mounts with the welder to stop the end
vibrating. Bought a 2.75" inconel split joint bellow
from SPD exhaust that should handle the heat.
http://www.spdexhaust.com/pdfs/AccPDFs/Bellows.pdf
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