Return-Path: Received: from [65.54.168.123] (HELO hotmail.com) by logan.com (CommuniGate Pro SMTP 4.2.4) with ESMTP id 451853 for flyrotary@lancaironline.net; Mon, 04 Oct 2004 08:04:32 -0400 Received-SPF: none receiver=logan.com; client-ip=65.54.168.123; envelope-from=lors01@msn.com Received: from mail pickup service by hotmail.com with Microsoft SMTPSVC; Mon, 4 Oct 2004 05:04:00 -0700 Received: from 65.54.98.171 by bay3-dav19.bay3.hotmail.com with DAV; Mon, 04 Oct 2004 12:03:30 +0000 X-Originating-IP: [65.54.98.171] X-Originating-Email: [lors01@msn.com] X-Sender: lors01@msn.com From: "Tracy Crook" To: "Rotary motors in aircraft" References: Subject: Re: [FlyRotary] Re: MAP pulses (20B) Date: Mon, 4 Oct 2004 08:03:31 -0400 MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_0028_01C4A9E8.A38B2AD0" X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: MSN 9 X-MimeOLE: Produced By MSN MimeOLE V9.10.0006.2205 Seal-Send-Time: Mon, 4 Oct 2004 08:03:31 -0400 Message-ID: X-OriginalArrivalTime: 04 Oct 2004 12:04:00.0641 (UTC) FILETIME=[3C028710:01C4AA0A] This is a multi-part message in MIME format. ------=_NextPart_000_0028_01C4A9E8.A38B2AD0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Subject: RE: [FlyRotary] Re: MAP pulses (20B) Al, It sounds like you have one of your Primary injectors sticking or stuck closed. After sitting for a long time I had both Primary injectors stick closed. The engine would start and run as long as the cold start was on. As soon as the cold start was turned off it would die. Test each injector statically to see if it clicks when power is applied. I'll probably go ahead and do the test, but I don't think that's it. = When I turn the secondary off the mixture is too rich. I have to lean quite a = bit, and then as the mixture bar gets about mid-scale, it begins to act = like it's too lean - some surging or whatever. Just kind of strange. Thanks, Al Be sure to remember that an imbalance in mixture between rotors can = cause an erroneous mixture reading if you are reading it after the = collector (which most are). Many builders have tried to tune mixture = with one rotor not running at all which is of course hopeless. Check = EGTs for clues to mixture imbalance. Tracy ------=_NextPart_000_0028_01C4A9E8.A38B2AD0 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable
 
 
Subject: RE: [FlyRotary] Re: MAP pulses (20B)

Al,
It = sounds=20 like you have one of your Primary injectors
sticking or stuck=20 closed.
After sitting for a long time I had both Primary = injectors
stick=20 closed.
The engine would start and run as long as the cold start=20 was
on.
As soon as the cold start was turned off it would = die.
Test=20 each injector statically to see if it clicks when power
is=20 applied.

I'll probably go ahead and do the test, but I don't = think=20 that's it.  When I
turn the secondary off the mixture is too = rich. I=20 have to lean quite a bit,
and then as the mixture bar gets about = mid-scale,=20 it begins to act like it's
too lean - some surging or = whatever.  Just=20 kind of strange.

Thanks,
Al
Be sure to remember that an imbalance in mixture between rotors = can cause=20 an erroneous mixture reading if you are reading it after the collector = (which=20 most are).  Many builders have tried to tune = mixture with one=20 rotor not running at all which is of course = hopeless.   Check=20 EGTs for clues to mixture imbalance.
 
Tracy
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