X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from aspensprings.uwyo.edu ([129.72.10.32] verified) by logan.com (CommuniGate Pro SMTP 5.2.16) with ESMTPS id 3858861 for flyrotary@lancaironline.net; Fri, 18 Sep 2009 15:27:15 -0400 Received-SPF: none receiver=logan.com; client-ip=129.72.10.32; envelope-from=SBoese@uwyo.edu Received: from ponyexpress-ht1.uwyo.edu (ponyexpress-ht1.uwyo.edu [10.84.60.208]) by aspensprings.uwyo.edu (8.14.2/8.14.2) with ESMTP id n8IJQBuK018716 (version=TLSv1/SSLv3 cipher=AES128-SHA bits=128 verify=NO) for ; Fri, 18 Sep 2009 13:26:37 -0600 (MDT) (envelope-from SBoese@uwyo.edu) Received: from Boesexps (172.26.4.5) by uwmail.uwyo.edu (10.84.60.198) with Microsoft SMTP Server id 8.1.393.1; Fri, 18 Sep 2009 13:26:35 -0600 From: sboese To: "'Rotary motors in aircraft'" Subject: RE: [FlyRotary] Mixture condition Date: Fri, 18 Sep 2009 13:26:11 -0600 Message-ID: MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_0042_01CA3863.96A27F30" 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 V6.00.2900.5579 ------=_NextPart_000_0042_01CA3863.96A27F30 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: quoted-printable John, =20 Check the fuel pressure regulator. If the diaphragm fails, fuel can be pumped through the manifold pressure sensing line into the intake = system. =20 Fuel pressure regulator malfunction could also explain why the outlet of = the FI fuel pump is so hot. =20 Steve Boese =20 =20 -----Original Message----- From: Rotary motors in aircraft [mailto:flyrotary@lancaironline.net] On Behalf Of John Sent: Friday, September 18, 2009 1:14 PM To: Rotary motors in aircraft Subject: [FlyRotary] Mixture condition =20 Jeff, I went back out and ran the engine again. The fuel pumps are = T-eed of after the gascolator and go to the separate fuel systems, the Weber = is on top of the engine, above the fuel level in tank. I ran the engine on = fuel injection and it was working fine when it was cool. I shut off the = primary injector switch and the engine quit immediately like it had always done = in the past, but when it go warm (190) and started missing, it ran a lot = better with the injector switch off and when I turned the injectors back on it = was missing terrible and this time I noticed that the Manifold pressure = creep up from 13# to 24# and the EGT on the #1 rotor went down to the bottom of = the scale. I tried the scene 3 times and the results were the same each = time with the primary or secondary injector switches on. Like wise it is a = big question to me, as to the change in function in the injector switches. =20 =20 Could it be that the computer is flooding the #2 rotor and the reason it doesn't quit when I turn the mixture to full lean at 2000 rpm. It does = run a little better at higher rpm's (like 4000). =20 =20 The injectors were reconditioned ones that I got from Bruce T and I'm thinking that the #1 primary injector may not be working when it gets = hot. On the other hand, doesn't the secondary system take over, or is that = only at higher rpm's. =20 If it is a ground condition, it seems like it wouldn't wait until the = engine is hot to quit working, it would be happening at any time. JohnD ------=_NextPart_000_0042_01CA3863.96A27F30 Content-Type: text/html; charset="us-ascii" Content-Transfer-Encoding: quoted-printable

John,

Check the fuel pressure = regulator. If the diaphragm fails, fuel can be pumped through the manifold pressure sensing line into the intake system.

Fuel pressure regulator malfunction = could also explain why the outlet of the FI fuel pump is so = hot.

Steve Boese

-----Original = Message-----
From: Rotary motors in = aircraft [mailto:flyrotary@lancaironline.net] On Behalf Of John
Sent: Friday, September = 18, 2009 1:14 PM
To: Rotary motors in = aircraft
Subject: [FlyRotary] = Mixture condition

Jeff, I went = back out and ran the engine again. The fuel pumps are T-eed of after the gascolator and go to the separate fuel systems, the Weber is on top of = the engine, above the fuel level in tank. I ran the engine on fuel = injection and it was working fine when it was cool. I shut off the primary = injector switch and the engine quit immediately like it had always done in the = past, but when it go warm (190) and started missing, it ran a lot better with the injector switch off and when I turned the injectors back on it was = missing terrible and this time I noticed that the Manifold pressure creep up = from 13# to 24# and the EGT on the #1 rotor went down to the bottom of the = scale. I tried the scene 3 times and the results were the same each time with = the primary or secondary injector switches on. Like wise it is a big question to = me, as to the change in function in the injector switches. =

Could it be that the = computer is flooding the #2 rotor and the reason it doesn't quit when I turn the = mixture to full lean at 2000 rpm. It does run a little better at higher rpm's = (like 4000).

The injectors were = reconditioned ones that I got from Bruce T and I'm thinking that the #1 primary = injector may not be working when it gets hot. On the other hand, doesn't the = secondary system take over, or is that only at higher rpm's.

If it is a ground = condition, it seems like it wouldn't wait until the engine is hot to quit working, it = would be happening at any time. JohnD

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