X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from [216.211.128.10] (HELO mail-in03.adhost.com) by logan.com (CommuniGate Pro SMTP 5.0.9) with ESMTP id 1063579 for flyrotary@lancaironline.net; Sun, 09 Apr 2006 22:13:04 -0400 Received-SPF: none receiver=logan.com; client-ip=216.211.128.10; envelope-from=joeh@pilgrimtech.com Received: from Pilgrim10 (c-67-183-14-47.hsd1.wa.comcast.net [67.183.14.47]) by mail-in03.adhost.com (Postfix) with ESMTP id D626E300A29 for ; Sun, 9 Apr 2006 19:12:08 -0700 (PDT) (envelope-from joeh@pilgrimtech.com) From: "Joe Hull" To: "'Rotary motors in aircraft'" Subject: RE: [FlyRotary] FI mystery Date: Sun, 9 Apr 2006 19:12:11 -0700 Message-ID: <00a601c65c44$2f33c010$bb02a8c0@redmond.corp.microsoft.com> MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_00A7_01C65C09.82D4E810" X-Mailer: Microsoft Office Outlook 11 In-Reply-To: X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.2670 Thread-Index: AcZb6jcCSmJvexjOTAiP/FfW44ZWjQAWNuAA This is a multi-part message in MIME format. ------=_NextPart_000_00A7_01C65C09.82D4E810 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit As I was racking my brain over this I see Ed's response come through - I think he's got it (i.e. vacuum issue). The only other thing I can think of is air. Filter clean? Leaks around the manifold? Does it idle at 1000RPM and steady? Joe Hull Cozy Mk-IV #991 (Done Building! In Phase1 Flight Test - 0 hrs flown) Redmond (Seattle), Washington _____ From: Rotary motors in aircraft [mailto:flyrotary@lancaironline.net] On Behalf Of Al Gietzen Sent: Sunday, April 09, 2006 8:27 AM To: Rotary motors in aircraft Subject: [FlyRotary] FI mystery I put about 4 - 5 hours of time on my engine installation months ago, and had everything pretty much "dialed in" for proper running from 1000 rpm up to max static rpm (~5200). Then it sat with no running for about 6 months while I did upholstery, paint and other stuff in my life. I've moved the plane to the airport, and got it all assembled. Yesterday rolled it out for an engine run-up. Since the beginning it had always fired off after a few strokes, and I'd turn off the cold start switch seconds after it was running. This time I had difficulty in getting it started. Once I got it running, it would quit immediately when the cold start switch was turned off. Leaving the cold start "on" it runs fine above about 2000 rpm with the mixture turned toward lean to about 9:00 o'clock. Reducing rpm lower it wants to die. As I increase rpm above 2000 I need to rotate mixture knob significantly toward to richer to keep things smooth. Fuel pressure, MAP, ignition, etc. all are normal. When I get the mixture knob adjusted it is smooth, so injectors are working on all three rotors. I didn't take it above the staging point so it is running on one set of injectors. Haven't had a chance yet to look at the mixture map on the EM2, and won't get back to the airport until Monday. I'm a bit baffled on what could have changed since last operation and what to check. Anybody have any similar experience? Ideas? Al ------=_NextPart_000_00A7_01C65C09.82D4E810 Content-Type: text/html; charset="us-ascii" Content-Transfer-Encoding: quoted-printable

As I was racking my brain over this = I see Ed’s response come through – I think he’s got it (i.e. = vacuum issue). The only other thing I can think of is air. Filter clean? = Leaks around the manifold? Does it idle at 1000RPM and = steady?

Joe = Hull

Cozy Mk-IV #991 (Done Building! In = Phase1 Flight Test - 0 hrs flown)

Redmond (Seattle), Washington

From: = Rotary motors in aircraft [mailto:flyrotary@lancaironline.net] On Behalf Of Al Gietzen
Sent: Sunday, April 09, = 2006 8:27 AM
To: Rotary motors in = aircraft
Subject: [FlyRotary] FI = mystery

I put about 4 - 5 hours of time on my engine = installation months ago, and had everything pretty much “dialed in” for = proper running from 1000 rpm up to max static rpm (~5200). Then it sat = with no running for about 6 months while I did upholstery, paint and other stuff = in my life. I’ve moved the plane to the airport, and got it all assembled. Yesterday rolled it out for an engine = run-up.

Since the beginning it had always fired off after a = few strokes, and I’d turn off the cold start switch seconds after it = was running. This time I had difficulty in getting it started. Once I = got it running, it would quit immediately when the cold start switch was turned = off. Leaving the cold start “on” it runs fine above about = 2000 rpm with the mixture turned toward lean to about 9:00 o’clock. = Reducing rpm lower it wants to die. As I increase rpm above 2000 I need to rotate mixture knob significantly toward to richer to keep things = smooth.

Fuel pressure, MAP, ignition, etc. all are = normal. When I get the mixture knob adjusted it is smooth, so injectors are = working on all three rotors. I didn’t take it above the staging point = so it is running on one set of injectors. Haven’t had a chance yet to = look at the mixture map on the EM2, and won’t get back to the airport = until Monday.

I’m a bit baffled on what could have changed = since last operation and what to check. Anybody have any similar experience? Ideas?

Al

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