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From: "William" <wschertz@ispwest.com>
To: "Rotary motors in aircraft" <flyrotary@lancaironline.net>
References: <list-530323@logan.com>
Subject: Re: [FlyRotary] Re: EWP Testing
Date: Sat, 13 Nov 2004 07:55:52 -0600
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Todd,
You have been (and are) a pioneer, and have established good data points to 
help us understand the system. You are right, that the best test is on the 
plane, but that is hard to do.

Do you know what your fuel burn and OAT was on some of your flights? It 
would be useful data also.

Bill Schertz
KIS Cruiser # 4045
----- Original Message ----- 
From: "Todd Bartrim" <haywire@telus.net>
To: "Rotary motors in aircraft" <flyrotary@lancaironline.net>
Sent: Saturday, November 13, 2004 1:22 AM
Subject: [FlyRotary] Re: EWP Testing

> Why wouldn't you want to do the test with the actual engine and cooling
> system in place? When I did my test I had my cooling system in what I 
> hoped
> at the time was it's final configuration. I did make a few changes
> afterward, most notably was the change of my hoses from 1" to 1.25" along
> with a more direct flow path enabled by the use of moulded rad hose (hard 
> to
> make bends without a kink in straight hose) in an effort to ensure I had
> little to no energy loses in the plumbing. I also fabricated my own header
> tank afterwards to place it in a better location (high on the FW), but 
> these
> change would only improve the flow.
> The biggest error that I made was that I didn't use a 14 volt power supply
> to power the pump to ensure that I had full bus voltage. At the time I was
> more interested in how it would perform running on battery only and for 
> how
> long, since at that time it was widely believed that battery death would 
> be
> instantaneous without the alt.
> If it wasn't that the magtube and transmitter that I used were far to
> heavy, bulky and expensive to use in flight and the fact that I just don't
> have the time, I would redo these tests.
> I do however have a small paddlewheel sensor installed in the main coolant
> line, however I just use this to output a 0-45hz signal and convert this 
> to
> a 1-5 volt signal which I input to the EM2 and display as 0-100, with an
> alarm set for 50.
> Anyways, my point is that I feel that all this testing using barrels of
> water etc, may be misleading. While I can understand the desire to do
> preliminary testing before the engine is actually ready for that, I think 
> it
> may be wiser to wait until the engine and cooling system is mounted and in 
> a
> reasonably close to final state, otherwise the results may be meaningless.
> Just one man's opinion.
>
> Todd Bartrim   (happily flying a turbo with far less than 30gpm)
>
> RV9Endurance
> 13B Turbo Rotary
> C-FSTB
> http://www3.telus.net/haywire/RV-9/C-FSTB.htm
>
>             "The world will always have a place for those that bring hard
> work and determination to the things they do."
>
>
>
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