X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from fed1rmmtao107.cox.net ([68.230.241.39] verified) by logan.com (CommuniGate Pro SMTP 5.2.14) with ESMTP id 3682569 for flyrotary@lancaironline.net; Mon, 15 Jun 2009 02:17:58 -0400 Received-SPF: none receiver=logan.com; client-ip=68.230.241.39; envelope-from=alventures@cox.net Received: from fed1rmimpo01.cox.net ([70.169.32.71]) by fed1rmmtao107.cox.net (InterMail vM.7.08.02.01 201-2186-121-102-20070209) with ESMTP id <20090615061722.WHJI18948.fed1rmmtao107.cox.net@fed1rmimpo01.cox.net> for ; Mon, 15 Jun 2009 02:17:22 -0400 Received: from BigAl ([72.192.135.181]) by fed1rmimpo01.cox.net with bizsmtp id 46HN1c00C3uzsQg036HN7P; Mon, 15 Jun 2009 02:17:22 -0400 X-VR-Score: 90.00 X-Authority-Analysis: v=1.0 c=1 a=khI05xte0CoA:10 a=CT-CF2cQ4U8A:10 a=wZPkBhahJ4UhB4l9fCMA:9 a=Q-cO_o0pvck9DawmYI-hIaVtLU8A:4 a=pvixzfRjWua-kNP5kTEA:9 a=p0aE46qcIr-Ou7FeawIA:7 a=yU-GLTngC_KHXfZOHye35950VvYA:4 X-CM-Score: 0.00 From: "Al Gietzen" To: "'Rotary motors in aircraft'" Subject: RE: [FlyRotary] Not developing full power. Date: Sun, 14 Jun 2009 23:18:06 -0800 Message-ID: <085AF6D5D431437F9A0BEB7867F048C2@BigAl> MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_002E_01C9ED46.5FF9A660" X-Priority: 3 (Normal) X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook, Build 10.0.6838 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.5579 Importance: Normal In-Reply-To: Thread-Index: AcntY7wX+VLDz3ERSvi9FvsxtSfIWAAIyQMg This is a multi-part message in MIME format. ------=_NextPart_000_002E_01C9ED46.5FF9A660 Content-Type: text/plain; charset="US-ASCII" Content-Transfer-Encoding: quoted-printable The numbers=20 jump around on the EM-2 from 19 to28. I just took down the ones that=20 seem to be displayed the most. Hummm? Engine running smooth. This=20 jumping around has been like this from the beginning. I have lines=20 running to ports on the front of the manifold and rear and have them=20 teed together and then to the EC-2. Yes, the lines are tight on the=20 EC-2. My mechanical gauge is smooth. I doubt the pressure is=20 fluxuating. I think the signal is being distorted somewhere.=20 =20 Don; It may be that the mechanical gauge is damping the effect of pulses; = whereas the EM2 is taking instantaneous readings. The biggest effect is at = idle. If you engine idles well there may be some other issue with the EM2 = readings. Some of us have added damping in the system by adding volume and an = orifice. =20 Additionally, When I switch off one of the Injector banks, the RPM=20 display on the EM-2 goes to 0. Not NOP. This happen with both the=20 Primary and secondary injectors banks. =20 This is peculiar. The RPM readout should not be affected by the = injector disable switches. NOP should only appear on the EM2 when there is no = power to the EC2. This suggests a wiring problem, which may also explain lack = of full power and the decreased EGT on rotor 2 with all injectors on. =20 I have always had a problem with Controlled B. It does not seem to=20 copy from A. =20 =20 Also suggests possible wiring problem. Tracy may be able to suggest specific pins to check, but it may be worth double checking all the connections. =20 Best of luck, =20 Al ------=_NextPart_000_002E_01C9ED46.5FF9A660 Content-Type: text/html; charset="US-ASCII" Content-Transfer-Encoding: quoted-printable

The numbers

jump around on the EM-2 from 19 to28. I just took down the ones = that

seem to be displayed the most. Hummm? Engine running = smooth. This

jumping around has been like this from the beginning. I have lines =

running to ports on the front of the manifold and rear and have them =

teed together and then to the EC-2. Yes, the lines are tight on the =

EC-2. My mechanical gauge is smooth. I doubt the pressure is =

fluxuating. I think the signal is being distorted somewhere.

Don;

It may be = that the mechanical gauge is damping the effect of pulses; whereas the EM2 is = taking instantaneous readings. The biggest effect is at idle. If you = engine idles well there may be some other issue with the EM2 readings. Some of = us have added damping in the system by adding volume and an orifice. =

Additionally, When I switch off one of the Injector banks, the RPM

display on the EM-2 goes to 0. Not NOP. This happen with both the =

Primary and secondary injectors banks.

This is peculiar. The RPM readout = should not be affected by the injector disable switches. NOP should only appear = on the EM2 when there is no power to the EC2. This suggests a wiring = problem, which may also explain lack of full power and the decreased EGT on rotor = 2 with all injectors on.

I have always had a problem with Controlled B. It does not seem to =

copy from A.

Also suggests = possible wiring problem. Tracy may be = able to suggest specific pins to check, but it may be worth double checking all the = connections.

<= /font>

Best of = luck,

<= /font>

Al

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