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Date: Sun, 23 Jan 2005 09:35:56 -0500
Subject: Re: [FlyRotary] Re: Dynos II
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From: Jerry Hey <j-winddesigns@thegrid.net>
To: "Rotary motors in aircraft" <flyrotary@lancaironline.net>
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Message-Id: <1782CFD4-6D4C-11D9-B492-0003931B0C7A@thegrid.net>

Good point,  Sterba told me the only dyno he needed was one of his 
props.  The only reason I am thinking of building a dyno as I want a 
test stand anyway and making it a dyno as well is not a that big of a 
deal.  Jerry


On Sunday, January 23, 2005, at 09:25  AM, jesse farr wrote:

> 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.
>
>
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