Return-Path: <13brv3@bellsouth.net> Received: from imf17aec.mail.bellsouth.net ([205.152.59.65] verified) by logan.com (CommuniGate Pro SMTP 4.2) with ESMTP id 381439 for flyrotary@lancaironline.net; Fri, 27 Aug 2004 16:09:23 -0400 Received-SPF: pass receiver=logan.com; client-ip=205.152.59.65; envelope-from=13brv3@bellsouth.net Received: from rd ([65.6.194.9]) by imf17aec.mail.bellsouth.net (InterMail vM.5.01.06.08 201-253-122-130-108-20031117) with ESMTP id <20040827200853.YSGL1758.imf17aec.mail.bellsouth.net@rd> for ; Fri, 27 Aug 2004 16:08:53 -0400 From: "Russell Duffy" <13brv3@bellsouth.net> To: "'Rotary motors in aircraft'" Subject: RE: [FlyRotary] Re: Engine run Date: Fri, 27 Aug 2004 15:09:09 -0500 Message-ID: <00b201c48c71$b6d93da0$6101a8c0@rd> MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_00B3_01C48C47.CE0335A0" X-Priority: 3 (Normal) X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook, Build 10.0.6626 Importance: Normal In-Reply-To: X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1409 This is a multi-part message in MIME format. ------=_NextPart_000_00B3_01C48C47.CE0335A0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: quoted-printable I don't think I have a problem with the MAP using the average of two = ports. The reading stays quite constant for awhile, but drops when the engine falters, then comes back up. I could try putting all three together, = but then I would not have an independent backup for controller B=20 =20 When you look at a normal vacuum gauge, do you see the violent pulsation that you know is occurring in the intake? A gauge will sort of average = this out, but that's not how the EC-2 reads it. The EC-2 takes an = instantaneous sample, so it can see the pulsations, and will try to act on it by = changing the fuel. =20 I guess I didn't realize that the secondaries would turn on below the staging point, but the thing that puzzles me is that turning off the secondaries reduced the rpm and made it rougher. So apparently they = were on even thought the MAP reading was 13.1. Something fishy.=20 That is fishy alright. Might be a good time to go through the injector = and switch wiring again. =20 Good luck, Rusty (to scoop, or not to scoop)=20 ------=_NextPart_000_00B3_01C48C47.CE0335A0 Content-Type: text/html; charset="us-ascii" Content-Transfer-Encoding: quoted-printable Message
I = don’t think I have=20 a problem with the MAP using the average of two ports.  The reading = stays=20 quite constant for awhile, but drops when the engine falters, then comes = back=20 up.  I could try putting all three together, but then I would not = have an=20 independent backup for controller B 
 
When you look at a = normal vacuum=20 gauge, do you see the violent pulsation that you know is occurring in = the=20 intake?  A gauge will sort of average this out, but that's not how = the EC-2=20 reads it.  The EC-2 takes an instantaneous sample, so it can = see the=20 pulsations, and will try to act on it by changing the fuel. =20  

I guess I = didn’t=20 realize that the secondaries would turn on below the staging point, but = the=20 thing that puzzles me is that turning off the secondaries reduced the = rpm and=20 made it rougher.  So apparently they were on even thought the MAP = reading=20 was 13.1.  Something fishy. 

That=20 is fishy alright.  Might be a good time to go through the injector = and=20 switch wiring = again.  

Good=20 luck,

Rusty (to=20 scoop, or not to=20 scoop) 

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