Return-Path: Received: from imf25aec.mail.bellsouth.net ([205.152.59.73] verified) by logan.com (CommuniGate Pro SMTP 4.3c3) with ESMTP id 819796 for flyrotary@lancaironline.net; Thu, 24 Mar 2005 23:52:09 -0500 Received-SPF: pass receiver=logan.com; client-ip=205.152.59.73; envelope-from=sladerj@bellsouth.net Received: from JSLADE ([65.2.90.31]) by imf25aec.mail.bellsouth.net (InterMail vM.5.01.06.11 201-253-122-130-111-20040605) with ESMTP id <20050325045125.VVO2829.imf25aec.mail.bellsouth.net@JSLADE> for ; Thu, 24 Mar 2005 23:51:25 -0500 From: "John Slade" To: "Rotary motors in aircraft" Subject: going lean? Date: Thu, 24 Mar 2005 23:51:21 -0500 Message-ID: MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_0075_01C530CC.61145030" X-Priority: 3 (Normal) X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook IMO, Build 9.0.2416 (9.0.2910.0) Importance: Normal X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1409 In-Reply-To: This is a multi-part message in MIME format. ------=_NextPart_000_0075_01C530CC.61145030 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Chrissi (building rotary Cozy IV) just sent me an email that has me wondering. She suggested that I might be going lean at high power because I'm running 4 * 550 injectors instead of the stock 2 * 550 and 2 * 850. I hit a "brick wall" in the power curve at a certain rpm beyond which I get a "stutter" feeling which listeners on the ground report as a "popping" sound. I've been thinking this is the edge of detonation and avoiding it. Maybe it is, but perhaps it's because the injectors have topped out rather than because of excess boost. Thoughts, anyone? Anyone have a couple of 850 injectors I can try? John (I need more power, Scotty) ------=_NextPart_000_0075_01C530CC.61145030 Content-Type: text/html; charset="us-ascii" Content-Transfer-Encoding: quoted-printable

Chrissi (building rotary Cozy IV) just sent = me an email=20 that has me wondering.

She suggested that I might be going lean at = high power=20 because I'm running 4 * 550 injectors instead of the stock 2 * 550 and 2 = * 850.=20 I hit a "brick wall" in the power curve at a certain rpm beyond which I = get a=20 "stutter" feeling which listeners on the ground report as a "popping" = sound.=20 I've been thinking this is the edge of detonation and avoiding it. Maybe = it is,=20 but perhaps it's because the injectors have topped out rather than = because of=20 excess boost.

Thoughts, anyone?

Anyone have a couple of 850 injectors I can=20 try?

John (I need more power,=20 Scotty)

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