Mailing List flyrotary@lancaironline.net Message #13456
From: Steve Brooks <prvt_pilot@yahoo.com>
Subject: RE: [FlyRotary] Re: power sag
Date: Sat, 4 Dec 2004 12:59:09 -0500
To: 'Rotary motors in aircraft' <flyrotary@lancaironline.net>
Message
Rusty,
Now that you mention it, I do recall reading about that.  I think that I will take your advise of running it a little richer is cool weather.
 
Steve Brooks
-----Original Message-----
From: Rotary motors in aircraft [mailto:flyrotary@lancaironline.net]On Behalf Of Russell Duffy
Sent: Saturday, December 04, 2004 11:48 AM
To: Rotary motors in aircraft
Subject: [FlyRotary] Re: power sag

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.

 
Hi Steve,
 
I recently reported something similar, which I also have no explanation.  I took off on the coldest day I've flown (58), and at about 800 ft, my engine sagged significantly.  I instinctively turned to re-enter the pattern, and also richened the mixture some, which seems to have restored normal rpm.  I had the mixture knob at it's normal takeoff position, but wondered if the cold weather required more fuel than the EC-2 added on it's own.  For the record, I don't absolutely know that richening the mixture corrected it.  It could have just corrected itself and the mixture change was a coincidence.  I set the mixture just a bit richer now :-)
 
Rusty
 




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