Dear Kim,
Many thanks for your interesting response to my prop balancing problem.
Graham Singleton is working with me on this one. He is down with the Flue as
I write, but he asks me to send his regards to you and your family.
We both entirely agree with you about the undesirability of OOB, and we are
very interested in your apparent insider knowledge.
Is there a reference on the use of accelerometers with a computer, together
with an IR. timing source? Could you be more specific about the a suitable
accelerometer spec?
Could we use a scope and a radially adjustable timing source to do the same
thing? Is there any software available for the computer solution?
Despite careful static balancing we do have some vibration at about 2800 RPM.
This changes as the prop assembly is repositioned radially around the
mounting flange. (Thanks Dale Hetrick, you are correct on that one)
Graham says that balancing is a very common problem. I can understand why.
Indeed it is noticeable that the characteristic is different going up in RPM
to going down. Could it be that the gear box backlash has some role to play
in this?
Please forgive me responding to your advice through the group address, but
perhaps others may be able to help. Remember I am hoping that there is an
inexpensive solution.
Happy Flying .........Bryan Allsop
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