klehman wrote in message
...
Garfield and company looked into this in some detail and concluded
exactly what you have. He located a reasonble cost rf unit (a few
hundred $) and planned to incorporate it into a short bolt on prop
extension so it could be moved from engine to engine. (I understand that
adding an extension is not ideal physics but I consider it a workable
plan.) An IR or laser LED was also discussed to beam the info down the
centerline of the shaft.

Anyway, I would plunk down $1000. in a heartbeat for such a plot,
probably more. Otherwise it will take me a couple of years to accumulate
a couple of hundred hours to gain confidence in my engine system. Your
location would be a factor. Multiple tests to let me tune the dampers in
my psru might be desireable. Even a single test to tell me what (if any)
rpm to avoid would be well worth $1000. in my opinion.

Yes I think you could recover your costs. No I don't think you could
make an ongoing business of it for a lot of reasons.

An under $1,000. unit such as Garfield envisioned that I could rent (or
build) would be wonderful. Even better would be releasing the details ...


....Ken's comment raises another point. If Dan performs this testing,
evaluation and reporting, his name goes on the list of defendants should the
homebuilt project spectacularly fail. Renting the instrumentation (with a
well-crafted waiver) could save him a hefty liability premium.

baltobernie