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From: "Steve Brooks" <prvt_pilot@yahoo.com>
To: "'Rotary motors in aircraft'" <flyrotary@lancaironline.net>
Subject: RE: [FlyRotary] Re: power sag
Date: Sat, 4 Dec 2004 15:28:10 -0500
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Tommy,
I'm not certain about the coolant, but the oil was barely 130F, the coolant
was pretty low.... maybe 140 or so if I had to guess.

Steve

-----Original Message-----
From: Rotary motors in aircraft [mailto:flyrotary@lancaironline.net]On
Behalf Of Tommy James
Sent: Saturday, December 04, 2004 2:26 PM
To: Rotary motors in aircraft
Subject: [FlyRotary] Re: power sag


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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