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From: "jesse farr" <jesse@jessfarr.com>
To: "Rotary motors in aircraft" <flyrotary@lancaironline.net>
References: <list-618116@logan.com>
Subject: Re: [FlyRotary] Re: Dynos II
Date: Sun, 23 Jan 2005 09:25:48 -0500
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Twenty years ago, I worked with a fellow who built aircraft engines.  He 
used a test bed of instrumentation and a "club-prop" which set in a cage. 
The engine was bolted to the aircraft just like being installed, aircraft 
tied down all around and his test bed instruments, all cylinder, exhaust, 
oil temp, fuel flow, etc. instrumentation hooked up and prop installed.  He 
would then break in engine running same.  He claimed he could also tell 
pretty much anything a person could by dyno-ing an engine simply by seeing 
what rpm, with what other details his instrumentation told him; so, maybe 
this is a good path to go down.  jofarr

----- Original Message ----- From: "Phil White" <philwhite9@aol.com>

> Why not make a "chassis dyno" out of our fuselage?
>    Install the engine with all its accessories and prop, cooling system,
> etc.  Attach tail to your car/truck to prevent movement, place scales
> under the main gear.  Have an assistant collect weight differential
> readings at various rpm's.  With accurate measurement of the track
> distance, the scale readings can be converted to ft-lbs of torque, and
> horsepower calculated.