Return-Path: <13brv3@bellsouth.net> Received: from imf24aec.mail.bellsouth.net ([205.152.59.72] verified) by logan.com (CommuniGate Pro SMTP 4.2.5) with ESMTP id 555863 for flyrotary@lancaironline.net; Sat, 04 Dec 2004 11:48:06 -0500 Received-SPF: pass receiver=logan.com; client-ip=205.152.59.72; envelope-from=13brv3@bellsouth.net Received: from rd ([65.6.194.9]) by imf24aec.mail.bellsouth.net (InterMail vM.5.01.06.11 201-253-122-130-111-20040605) with ESMTP id <20041204164726.RREX2421.imf24aec.mail.bellsouth.net@rd> for ; Sat, 4 Dec 2004 11:47:26 -0500 From: "Russell Duffy" <13brv3@bellsouth.net> To: "'Rotary motors in aircraft'" Subject: RE: [FlyRotary] power sag Date: Sat, 4 Dec 2004 10:47:43 -0600 Message-ID: <000801c4da20$f9dfaa10$6101a8c0@rd> MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_0009_01C4D9EE.AF453A10" X-Priority: 3 (Normal) X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook, Build 10.0.6626 Importance: Normal X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.2180 In-Reply-To: This is a multi-part message in MIME format. ------=_NextPart_000_0009_01C4D9EE.AF453A10 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: quoted-printable 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. =20 Hi Steve, =20 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 :-) =20 Rusty =20 ------=_NextPart_000_0009_01C4D9EE.AF453A10 Content-Type: text/html; charset="us-ascii" Content-Transfer-Encoding: quoted-printable Message

On Saturday, I went to fly, and had some trouble = getting it to=20 stay running due to the cold temperatures.  I probably didn't keep = it rich=20 enough, long enough.  I taxied out to the far end of the runway = (5000'),=20 and took the runway for take off.

As I accelerated to about 90 = kts, I was=20 just rotating when to power dropped substantially.  I cut the = throttle, and=20 aborted the takeoff.

 
Hi=20 Steve,
 
I = recently reported=20 something similar, which I also have no explanation.  I took off on = the=20 coldest day I've flown (58), and at about 800 ft, my engine sagged=20 significantly.  I instinctively turned to re-enter the pattern, and = also=20 richened the mixture some, which seems to have restored normal = rpm.  I had=20 the mixture knob at it's normal takeoff position, but wondered if the = cold=20 weather required more fuel than the EC-2 added on it's own.  For = the=20 record, I don't absolutely know that richening the mixture corrected = it. =20 It could have just corrected itself and the mixture change was a=20 coincidence.  I set the mixture just a bit richer now=20 :-)
 
Rusty
 




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