X-Virus-Scanned: clean according to Sophos on Logan.com From: "Bill Bradburry" Received: from vms173023pub.verizon.net ([206.46.173.23] verified) by logan.com (CommuniGate Pro SMTP 6.1.8) with ESMTPS id 8355587 for flyrotary@lancaironline.net; Mon, 25 Jan 2016 20:41:19 -0500 Received-SPF: pass receiver=logan.com; client-ip=206.46.173.23; envelope-from=bbradburry@verizon.net Received: from Desktop ([173.71.14.135]) by vms173023.mailsrvcs.net (Oracle Communications Messaging Server 7.0.5.32.0 64bit (built Jul 16 2014)) with ESMTPA id <0O1J002QKE0F6E80@vms173023.mailsrvcs.net> for flyrotary@lancaironline.net; Mon, 25 Jan 2016 19:41:03 -0600 (CST) X-CMAE-Score: 0 X-CMAE-Analysis: v=2.1 cv=MtGvkDue c=1 sm=1 tr=0 a=YsSROtz1JO3+GnD2bqMDlQ==:117 a=7aQ_Q-yQQ-AA:10 a=r77TgQKjGQsHNAKrUKIA:9 a=Ia-xEzejAAAA:8 a=7qB8e_M51yy-slxFtUYA:9 a=rDKQsOxAr0nmJn60:21 a=i43Y8F1e-h8IXF_h:21 a=CjuIK1q_8ugA:10 a=SSmOFEACAAAA:8 a=K1O35iUo8ONgEJA_xYAA:9 a=g22XYU-GFgrwybQY:21 a=gKO2Hq4RSVkA:10 a=UiCQ7L4-1S4A:10 a=hTZeC7Yk6K0A:10 a=frz4AuCg-hUA:10 To: "'Rotary motors in aircraft'" References: In-reply-to: Subject: RE: [FlyRotary] Re: parts upgrade; was: What do you think may be happening? Date: Mon, 25 Jan 2016 19:41:13 -0600 Message-id: <06B6EDE3427E46C3B430936E64DE23EF@Desktop> MIME-version: 1.0 Content-type: multipart/alternative; boundary="----=_NextPart_000_004F_01D157A8.5957BEE0" X-Mailer: Microsoft Office Outlook 11 Thread-index: AdFXvUlCmrPDWJlfQ3GvID9OYmglcwAGzFQQ X-MIMEOLE: Produced By Microsoft MimeOLE V6.0.6002.18463 This is a multi-part message in MIME format. ------=_NextPart_000_004F_01D157A8.5957BEE0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Steve, That would be a wonderful idea! I am still thinking about the pictures of your deck with 3 feet of snow on it from last year! During your takeoff run will the P51 scoop up snow?? I guess I was not clear previously. Turning off the secondary brings the mixture from about 14.7 to about 13.0. From what you say, this should not happen. There should be no change. From idle with both disable switches on. Normal operation. If I then turn on the cold start, the mixture goes to about 10 from a previous about 14.7 I may be confused from what you are asking below but, I have never had both disable switches on at the same time. Only one at a time. Usually nowadays, the secondary first, slight increase in mixture shows up on the O2 sensor, them secondary back off, then the primary on, engine tries to die, turn it back off rapidly to recover. I have yet to try to recover the engine die condition by turning on the cold start switch. I only now turn the primary switch back off to cause the engine to recover. I plan to try the cold start switch next time. Come on down! :>) Bill _____ From: Rotary motors in aircraft [mailto:flyrotary@lancaironline.net] Sent: Monday, January 25, 2016 4:11 PM To: Rotary motors in aircraft Subject: [FlyRotary] Re: parts upgrade; was: What do you think may be happening? Bill, I agree that once a logic level ground is applied to EC2 pin 30, it shouldn't matter where that connection comes from or how many there are. It would be good to verify that I am understanding correctly the series of events described below: "With the engine at idle, mixture at 14.7, disabling the secondary brings the mixture to about 13.0. If I turn both disables on, and then turn cold start on, the mixture goes really rich around 10." The first sentence seems straightforward but troubling as stated previously. In the second sentence, are you saying that beginning with the engine running normally with the injector disable switches both off (normal operating position), you then turn both injector disable switches on? At this point does the engine begin to die? If it does, this is normal. If you then turn on the cold start switch before the engine stops, does the engine recover and run very rich? If it does, then this is not normal and the cold start switch is somehow supplying bus power to the injectors instead of supplying a logic ground to the EC2 pin 30. This seems like quite a remote possibility, so I am probably not understanding your description correctly. I now have 8 minutes of flight time on my P51 type cooling scoop and revised exhaust system. Maybe a test flight to Texas is now in order? Steve Boese _____ From: Rotary motors in aircraft on behalf of Bill Bradburry Sent: Monday, January 25, 2016 2:07 PM To: Rotary motors in aircraft Subject: [FlyRotary] Re: parts upgrade; was: What do you think may be happening? Steve, Ok, when you turn on the disable switches, they ground the pin 30 input on the EC-2 to the case of the EC-2. When you turn on cold start, you ground the pin 30 to the case. How the heck does the EC-2 know the difference so that it can act differently??? Bill ------=_NextPart_000_004F_01D157A8.5957BEE0 Content-Type: text/html; charset="us-ascii" Content-Transfer-Encoding: quoted-printable

Steve,

 

That would be a wonderful = idea!  I am still thinking about the pictures of your deck with 3 feet of snow on it = from last year!  During your takeoff run will the P51 scoop up = snow??

 

I guess I was not clear = previously.  Turning off the secondary brings the mixture from about 14.7 to about = 13.0.  From what you say, this should not happen.  There should be no = change.

 

From idle with both disable = switches on.  Normal operation.  If I then turn on the cold start, the = mixture goes to about 10 from a previous about 14.7

 

I may be confused from what you are = asking below but, I have never had both disable switches on at the same = time.  Only one at a time.  Usually nowadays, the secondary first, slight = increase in mixture shows up on the O2 sensor, them secondary back off, then the primary on, = engine tries to die, turn it back off rapidly to = recover.

 

I have yet to try to recover the = engine die condition by turning on the cold start switch.  I only now turn = the primary switch back off to cause the engine to recover.  I plan to = try the cold start switch next time.

 

Come on down! =   :>)

 

 

Bill

From: = Rotary motors in aircraft [mailto:flyrotary@lancaironline.net]
Sent: Monday, January 25, = 2016 4:11 PM
To: Rotary motors in aircraft
Subject: [FlyRotary] Re: = parts upgrade; was: What do you think may be = happening?

 

Bill,

 

I agree that = once a logic level ground is applied to EC2 pin 30, it shouldn't matter = where that connection comes from or how many there = are.

 

It would be = good to verify that I am understanding correctly the series of events described = below:

 

"With the engine at idle, = mixture at 14.7, disabling the secondary brings the mixture to about 13.0.  If = I turn both disables on, and then turn cold start on, the mixture goes really = rich around 10."

 

The first = sentence seems straightforward but troubling as stated = previously.

 

In the second sentence, are you saying that beginning with the engine running normally = with the injector disable switches both off (normal operating position), you = then turn both injector disable switches on?  At this point does the engine begin to die?  If it does, this is normal.  If you = then turn on the cold start switch before the engine stops, does the engine = recover and run very rich?  If it does, then this is not normal and the = cold start switch is somehow supplying bus power to the injectors instead of supplying a logic ground to the EC2 pin = 30.

 

This seems = like quite a remote possibility, so I am probably not understanding your = description correctly.

 

I now have 8 = minutes of flight time on my P51 type cooling scoop and revised exhaust = system.  Maybe a test flight to Texas is now in order?

 

Steve = Boese

  &n= bsp;

From: = Rotary motors in aircraft <flyrotary@lancaironline.net> on behalf of Bill Bradburry <flyrotary@lancaironline.net>
Sent: Monday, January 25, = 2016 2:07 PM
To: Rotary motors in aircraft
Subject: [FlyRotary] Re: = parts upgrade; was: What do you think may be happening?

 

Steve,

 

Ok, when you = turn on the disable switches, they ground the pin 30 input on the EC-2 to the case = of the EC-2.  When you turn on cold start, you ground the pin 30 to the case.  How the heck does the EC-2 know the difference so that it = can act differently???

 

Bill =

 

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