X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from fmailhost06.isp.att.net ([207.115.11.56] verified) by logan.com (CommuniGate Pro SMTP 5.2.16) with ESMTP id 3859036 for flyrotary@lancaironline.net; Fri, 18 Sep 2009 19:01:45 -0400 Received-SPF: none receiver=logan.com; client-ip=207.115.11.56; envelope-from=bbradburry@bellsouth.net Received: from desktop (adsl-157-63-231.mco.bellsouth.net[68.157.63.231]) by isp.att.net (frfwmhc06) with SMTP id <20090918230108H0600nsr62e>; Fri, 18 Sep 2009 23:01:09 +0000 X-Originating-IP: [68.157.63.231] From: "Bill Bradburry" To: "'Rotary motors in aircraft'" References: In-Reply-To: Subject: RE: [FlyRotary] Mixture condition Date: Fri, 18 Sep 2009 19:01:10 -0400 Message-ID: MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_0006_01CA3892.62DEF500" X-Mailer: Microsoft Office Outlook 11 Thread-Index: Aco4lE1/BdXlo3e3S4OiJyTSec36DgAHvy6A X-MimeOLE: Produced By Microsoft MimeOLE V6.0.6001.18049 This is a multi-part message in MIME format. ------=_NextPart_000_0006_01CA3892.62DEF500 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit John, How do you shut off the fuel flow to the two systems when you are using the other one? It seems to me that you must have some fuel flowing to the carb when you are trying to run on the injectors. Does this system cause you to be susceptible to carb ice even when you are on the injectors? I looked back and found your pics from 9/17 last year. Do you have any more? Bill B _____ From: Rotary motors in aircraft [mailto:flyrotary@lancaironline.net] On Behalf Of John Sent: Friday, September 18, 2009 3:14 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 ------=_NextPart_000_0006_01CA3892.62DEF500 Content-Type: text/html; charset="us-ascii" Content-Transfer-Encoding: quoted-printable

John,

How do you shut off the fuel flow to the two systems when you = are using the other one?  It seems to me that you must have some fuel flowing = to the carb when you are trying to run on the injectors.  Does this system = cause you to be susceptible to carb ice even when you are on the = injectors?  I looked back and found your pics from 9/17 last year.  Do you have any = more?

Bill B 

 

From: Rotary motors in aircraft [mailto:flyrotary@lancaironline.net] On Behalf Of John
Sent: Friday, September = 18, 2009 3:14 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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