"Sneed, Glen" wrote:

Jeff,
The idea is not to run an engine at load for any length of time.  Short
burst under load should give you info you are wanting using the instruments
plan for the aircraft.  This is an cheap way to get fuel flows, horsepower,
egt, and more.  I would think 1-2 minute burst with cooling time in between
each test should keep things cool enough.

I don't think running water through the air vents in the rotors is a good
idea during a dyno run.  It would cause excessive drag giving a lower than
actual reading.  It could be used between runs to reduce the time between
each run.

It could be configured as a removable appliance to the engine test stand.
Once built, you could test changes to the engine for there effect without
having big bucks tied up in a real dyno.  I would think it can be built for
around $150.00 and a day in the garage.

Here in Denver, an engine dyno rents for $500.00 a day with a one day
minimum, that include setup and teardown.  You better be ready to do a lot
of work.

Glenn Sneed

What is the matter with a prop load Glen. You will need a redrive sooner
or later.

Paul Lamar
 
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