Return-Path: Received: from fed1mtao03.cox.net ([68.6.19.242] verified) by logan.com (CommuniGate Pro SMTP 4.2b1) with ESMTP id 3131348 for flyrotary@lancaironline.net; Sun, 28 Mar 2004 12:33:37 -0500 Received: from BigAl ([68.107.116.221]) by fed1mtao03.cox.net (InterMail vM.5.01.06.08 201-253-122-130-108-20031117) with ESMTP id <20040328173338.YDBQ2428.fed1mtao03.cox.net@BigAl> for ; Sun, 28 Mar 2004 12:33:38 -0500 From: "Al Gietzen" To: "'Rotary motors in aircraft'" Subject: RE: [FlyRotary] Re: One step forward and .9 steps back. Date: Sun, 28 Mar 2004 09:33:43 -0800 Message-ID: <003201c414ea$d0cfd240$6400a8c0@BigAl> MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_0033_01C414A7.C2AC9240" X-Priority: 3 (Normal) X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook, Build 10.0.4024 Importance: Normal X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1165 In-Reply-To: This is a multi-part message in MIME format. ------=_NextPart_000_0033_01C414A7.C2AC9240 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Problem 2: I was very disappointed to discover that turning off the alternator makes the engine barely run, especially with any other electrical load, even with 2 batteries connected. They are fresh healthy batteries. The voltage drops from 14.2 to 11.5. If running at less than 2300 RPM when the alternator is turned off the engine begins to surge or stops running all together (however, running on just one set of coils improves the problem.) If running at higher RPM the engine will just sag a little. The coils and injectors ought to run fine on 11.5 volts. We ran my 20B off batteries at the dyno, and ran a whole session not realizing the charger wasn't connected. Look for high resistance somewhere in the power leads to the coils or injectors - too small a wire, bad connection etc; FWIW, Al ------=_NextPart_000_0033_01C414A7.C2AC9240 Content-Type: text/html; charset="us-ascii" Content-Transfer-Encoding: quoted-printable Message
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Problem 2:  I was very disappointed to discover that turning off = the alternator makes the engine barely run, especially with any other = electrical load, even with 2 batteries connected.   They are fresh = healthy batteries.  The voltage drops from 14.2 to 11.5.  If running = at less than 2300 RPM when the alternator is turned off the engine begins to = surge or stops running all together (however, running on just one set of coils = improves the problem.)  If running at higher RPM the engine will just sag a = little.



The coils and injectors ought to run fine on 11.5 volts.  We ran my 20B = off batteries at the dyno, and ran a whole session not realizing the charger = wasn’t connected.  Look for high resistance somewhere in the power leads = to the coils or injectors – too small a wire, bad connection = etc;

FWIW,

Al

 

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