Return-Path: Received: from fed1rmmtao12.cox.net ([68.230.241.27] verified) by logan.com (CommuniGate Pro SMTP 4.2) with ESMTP id 382247 for flyrotary@lancaironline.net; Sat, 28 Aug 2004 11:21:22 -0400 Received-SPF: none receiver=logan.com; client-ip=68.230.241.27; envelope-from=ALVentures@cox.net Received: from BigAl ([68.107.116.221]) by fed1rmmtao12.cox.net (InterMail vM.6.01.03.02.01 201-2131-111-104-103-20040709) with ESMTP id <20040828152050.CYXL23684.fed1rmmtao12.cox.net@BigAl> for ; Sat, 28 Aug 2004 11:20:50 -0400 From: "Al Gietzen" To: "'Rotary motors in aircraft'" Subject: RE: [FlyRotary] Re: Engine run Date: Sat, 28 Aug 2004 08:21:00 -0700 Message-ID: <000001c48d12$a01190d0$6400a8c0@BigAl> MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_0001_01C48CD7.F3B2B8D0" 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 V6.00.2900.2180 This is a multi-part message in MIME format. ------=_NextPart_000_0001_01C48CD7.F3B2B8D0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: quoted-printable Subject: [FlyRotary] Re: Engine run I had similar symptoms that about drove me batty. The engine simply = acted as if it were too rich at low rpms and the secondaries were on below the point they should have been. If I leaned it out enough to cure this = problem, the high end would be too lean. =20 This WILL happen IF the pressure sensor is not seeing manifold = pressure. In my case, I though I had pushed the manifold hoses on the barbs of the sensors but in reality had apparently shoved them between some board components. Ed; =20 I had verified early on that the connections are securely in place. The = MAP readout on the EM2 is coming from the data feed from the EC2, so if the = EM2 says 13" then 'presumably' the EC2 is using 13". =20 I have not asked but presume you have tried the "B" controller. In my = case, it made no difference because neither pressure sensor were sensing = manifold pressure. But, if one is connected then switch controllers should make = a difference (if this is the problem). =20 I have not yet tried controller B. I believe it is still all set to = default settings. During the relatively brief runs so far I have stayed with controller A because I made changes in timing, injector flow rates, = mixture balance between rotors, and the mixture correction table, during the = dyno runs. I don't want to abandon that as it was one of the main features = of that test program - get all that stuff out of the way before I got it on = the airplane. =20 As Rusty suggested; "however painful", I'm going to have to first do = more calibration work on the EM2 so I can believe what I'm reading. And, I = may have to go back to 'default' on all the injector parameters, and start = over. I have to have a reliable O2 sensor readout, and I may try 'pneumatic filter' on the MAP input. =20 Al =20 =20 Ed =20 Ed Anderson RV-6A N494BW Rotary Powered Matthews, NC ----- Original Message -----=20 From: Al Gietzen =20 To: Rotary motors in aircraft=20 Sent: Saturday, August 28, 2004 1:47 AM Subject: [FlyRotary] Re: Engine run =20 I guess I didn't realize that the secondaries would turn on below the staging point, but the thing that puzzles me is that turning off the secondaries reduced the rpm and made it rougher. So apparently they = were on even thought the MAP reading was 13.1. Something fishy.=20 That is fishy alright. Might be a good time to go through the injector = and switch wiring again. =20 Good luck, Yeah, but these are the same wiring harnesses, connected the same way as = on the dyno - and it worked fine there. OK; its worth some further = checking. It is always something you least expect. Al ------=_NextPart_000_0001_01C48CD7.F3B2B8D0 Content-Type: text/html; charset="us-ascii" Content-Transfer-Encoding: quoted-printable Message

Subject: [FlyRotary] Re: Engine run

I had similar symptoms that = about drove me batty.  The engine simply acted as if it were too rich at = low rpms and the secondaries were on below the point they should have = been. If I leaned it out enough to cure this problem, the high end would be too = lean.

 

 This WILL happen IF = the pressure sensor is not seeing manifold pressure.  In my case, I = though I had pushed the manifold hoses on the barbs of the sensors but in reality = had apparently shoved them between some board components.

Ed;

 

I had verified early on that the = connections are securely in place.  The MAP readout on the EM2 is coming from = the data feed from the EC2, so if the EM2 says 13” then = ‘presumably’ the EC2 is using 13”.

 

I have not asked but = presume you have tried the "B" controller.  In my case, it made no = difference because neither pressure sensor were sensing manifold pressure.  = But, if one is  connected then switch controllers should make a difference = (if this is the problem).

 

I have not yet tried controller = B.  I believe it is still all set to default settings.  During the = relatively brief runs so far I have stayed with controller A because I made changes = in timing, injector flow rates, mixture balance between rotors, and the = mixture correction table, during the dyno runs.  I don’t want to = abandon that as it was one of the main features of that test program – get all = that stuff out of the way before I got it on the airplane.

 

As Rusty suggested; = “however painful”, I’m going to have to first do more calibration = work on the EM2 so I can believe what I’m reading.  And, I may have = to go back to ‘default’ on all the injector parameters, and start = over.  I have to have a reliable O2 sensor readout, and I may try = ‘pneumatic filter’ on the MAP input.

 

Al

 

 

Ed

 

Ed Anderson
RV-6A N494BW Rotary Powered
Matthews, NC

=

----- Original Message = -----

From: Al = Gietzen

Sent: Saturday, August 28, 2004 1:47 AM

Subject: [FlyRotary] Re: Engine run

 

I guess I = didn’t realize that the secondaries would turn on below the staging point, but = the thing that puzzles me is that turning off the secondaries reduced the = rpm and made it rougher.  So apparently they were on even thought the MAP = reading was 13.1.  Something fishy. 

That is fishy alright.  Might be a good time to go through the injector and = switch wiring again.  

Good = luck,

Yeah, but these = are the same wiring harnesses, connected the same way as on the dyno – and = it worked fine there.  OK; its worth some further checking.  It = is always something you least expect.

Al

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