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Date: Mon, 08 Sep 2008 15:30:14 -0400
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From: "John Huft" <aflyer@lazy8.net>
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Subject: RE: [LML] Re: flight testing for speed
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Thanks Lorn

I run my testing at 2500 rpm. This is because I do many hours of testing,
and I don't want to wear out the engine prematurely. Also, my prop, a
blended airfoil Hartzell, has a time limit on ops over 2600 rpm. I think the
results of drag reduction etc. will scale with the small increase in power
when racing.

When racing, I run wide open everything.

John
Race 18 "Nuisance"


-----Original Message-----
From: Lancair Mailing List [mailto:lml@lancaironline.net] On Behalf Of Lorn
H Olsen
Sent: Sunday, September 07, 2008 4:09 PM
To: lml@lancaironline.net
Subject: [LML] Re: flight testing for speed

John,

What engine are you using? Your web sight says that you race at 2,500  
RPM. I have a Lycoming O-320-D1F and run at 2,700 RPM.

The first race that I ran in, I used 2,500 RPM and came in last. You  
need to use full throttle, highest RPM and lean while watching the  
CHTs. If you don't want to run your engine at maximum power, don't  
bother to race.

Lorn

> From: "John Huft" <aflyer@lazy8.net>
> Date: September 4, 2008 11:33:51 AM GMT-04:00
>
> Hi All
>
> Lately, I have been getting more and more interested in flight  
> testing for speed, trying to quantify the results of the various  
> mods I make to my lowly RV8.
>
> Since you are a serious group, and include many techies, I would  
> like to hear from you any criticisms or suggestions for improvements  
> of my  new webpage at
>
> http://www.lazy8.net/flight_testing.htm
>
> It is a summary of my forum at OSH. Also included is a spreadsheet  
> that will calculate % engine power at various atmospheric conditions  
> (this would be the percent of sea level, full throttle power at the  
> given RPM).
>
> Thanks for any help,
>
> John Huft
> Race 18, "Nuisance"

--
Lorn H. 'Feathers' Olsen, MAA, ASMEL, ASES, Comm, Inst
DynaComm, Corp., 248-345-0500, mailto:lorn@dynacomm.us
LNC2, FB90/92, O-320-D1F, 1,400 hrs, N31161, Y47, SE Michigan


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