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From: "Tommy James" <twjames@statesville.net>
To: "'Rotary motors in aircraft'" <flyrotary@lancaironline.net>
Subject: RE: [FlyRotary] power sag
Date: Sat, 4 Dec 2004 14:25:34 -0500
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Message-Id: <200412041425109.SM01196@TWJames>

Steve, What was the coolant temp at takeoff?  Sounds like the engine went
lean with the cold temperature and boost.  I'd make sure it was 'super rich'
for takeoff, like 8 bars or more on the EM2 mixture meter.  
Regards, Tommy<><


On Saturday, I went to fly, and had some trouble getting it to stay running
due to the cold temperatures.  I probably didn't keep it rich enough, long
enough.  I taxied out to the far end of the runway (5000'), and took the
runway for take off.

As I accelerated to about 90 kts, I was just rotating when to power dropped
substantially.  I cut the throttle, and aborted the takeoff.

I don't know exactly what caused the sag.  I pulled the throttle all the way
back during the aborted takeoff, and the engine died.  I have my idle stop
set a little low (400 RPM's), and usually don't pull it all the way off, but
even when I do, it has never died.

I restarted it, and ran the power up to about 4000, and it seemed OK.

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