X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from [216.211.128.10] (HELO mail-in02.adhost.com) by logan.com (CommuniGate Pro SMTP 5.0.9) with ESMTP id 1125352 for flyrotary@lancaironline.net; Tue, 23 May 2006 19:02:44 -0400 Received-SPF: none receiver=logan.com; client-ip=216.211.128.10; envelope-from=joeh@pilgrimtech.com Received: from Pilgrim10 (tide535.microsoft.com [131.107.0.105]) by mail-in02.adhost.com (Postfix) with ESMTP id D90EC2C649D for ; Tue, 23 May 2006 16:01:34 -0700 (PDT) (envelope-from joeh@pilgrimtech.com) From: "Joe Hull" To: "'Rotary motors in aircraft'" Subject: RE: [FlyRotary] Re: Another case of heat-soaked coils? Date: Tue, 23 May 2006 16:01:52 -0700 Message-ID: <002d01c67ebc$e1bf7450$cda0389d@redmond.corp.microsoft.com> MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_002E_01C67E82.35609C50" X-Mailer: Microsoft Office Outlook 11 Thread-Index: AcZ+ukj6qr8x4//PQXywlQdmATCrQgAAPvbw X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.2869 In-Reply-To: This is a multi-part message in MIME format. ------=_NextPart_000_002E_01C67E82.35609C50 Content-Type: text/plain; charset="US-ASCII" Content-Transfer-Encoding: 7bit >I missed that. Question is, was the engine really varying that much or was it something else? The EM2 >gets tach info by watching the primary injector switching. If the injector drive was erratic that would >make the tach go wacky. John said controller A & B worked the same so I ruled out controller problems. >An intermittent connection to the injector would fit the symptoms though. If anything in the ignition loop is intermittent (e.g. coil or spark plug) the engine will stumble causing a loss of RPM. Won't the controller see wider spaced signals from the crank angle sensor and slow the injectors to match? I think the thigh bone is connected to the leg bone.I mean things are interdependent. If the RPM is based on injector pulses and injector pulses are dependent on crank angle sensor, then couldn't it be anything that slows the engine down from partially clogged injectors to bad coil(s)? Joe Hull (puzzling over the mysteries of internal combustion engines) Cozy Mk-IV #991 (In Phase1 Flight Test - 10.9 hrs flown) Redmond (Seattle), Washington ------=_NextPart_000_002E_01C67E82.35609C50 Content-Type: text/html; charset="US-ASCII" Content-Transfer-Encoding: quoted-printable

>I missed that.  Question is, was the engine really varying that much or was = it something else?  The EM2 >gets tach info by watching the primary injector switching.  If the injector drive was erratic that would = >make the tach go wacky.  John said controller A & B worked the same = so I ruled out controller problems.  >An intermittent = connection to the injector would fit the symptoms = though.

 

If anything in the ignition loop is = intermittent (e.g. coil or spark plug) the engine will stumble causing a loss of RPM. = Won’t the controller see wider spaced signals from the crank angle sensor and = slow the injectors to match? I think the thigh bone is connected to the leg = bone…I mean things are interdependent. If the RPM is based on injector pulses = and injector pulses are dependent on crank angle sensor, then couldn’t = it be anything that slows the engine down from partially clogged injectors to = bad coil(s)?

 

Joe Hull (puzzling over the = mysteries of internal combustion engines)

Cozy Mk-IV #991 (In Phase1 Flight = Test - 10.9 hrs flown)

Redmond (Seattle), Washington

------=_NextPart_000_002E_01C67E82.35609C50--