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 5.2.14) with ESMTPS id 3757030 for flyrotary@lancaironline.net; Tue, 14 Jul 2009 09:55:36 -0400 Received-SPF: none receiver=logan.com; client-ip=129.72.10.32; envelope-from=SBoese@uwyo.edu Received: from ponyexpress-ht2.uwyo.edu (ponyexpress-ht2.uwyo.edu [10.84.60.209]) by aspensprings.uwyo.edu (8.14.2/8.14.2) with ESMTP id n6EDsdVU017026 (version=TLSv1/SSLv3 cipher=AES128-SHA bits=128 verify=FAIL) for ; Tue, 14 Jul 2009 07:54:52 -0600 (MDT) (envelope-from SBoese@uwyo.edu) Received: from Boesexps (172.26.4.5) by uwmail.uwyo.edu (10.84.60.199) with Microsoft SMTP Server id 8.1.375.2; Tue, 14 Jul 2009 07:54:44 -0600 From: sboese To: "'Rotary motors in aircraft'" Subject: RE: [FlyRotary] Re: cold switch and injector backup mode Date: Tue, 14 Jul 2009 07:54:22 -0600 Message-ID: MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_0008_01CA0458.4CB0D190" X-Priority: 3 (Normal) X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook, Build 10.0.6626 In-Reply-To: Importance: Normal X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.5579 ------=_NextPart_000_0008_01CA0458.4CB0D190 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: quoted-printable Bill, =20 Comments embedded below: =20 I should emphasize that the observations I make are for only my EC2 = which is set up for the 13B engine. A controller set up for a piston engine with individual injectors for each cylinder would be a different animal and probably incorporate a doubling of the pulse width with the cold = function and not have an injector backup mode. This is just a guess on my part, though. =20 =20 Steve Boese =20 -----Original Message----- From: Rotary motors in aircraft [mailto:flyrotary@lancaironline.net] On Behalf Of Bill Bradburry Sent: Tuesday, July 14, 2009 7:03 AM To: Rotary motors in aircraft Subject: [FlyRotary] Re: cold switch and injector backup mode =20 Hi Steve, I assume you are getting your information from your data logger which = means that you know what is really happening as opposed to what someone thinks will happen. So tell me this. If I am flying in cruise at say, 8000 ft and 24" of MAP, and I turn off = the secondaries.What will happen?. I was above the staging point and all = four injectors were on. I turned two of them off. Will the primaries = continue to run at the same duty cycle, or will they attempt to double their duty cycle up to the max of 100%? Above the staging point, if you have the = system wired with the double pole switch so turning off the secondaries also engages the cold function, the engine will run with the primaries having doubled their duty cycle (up to the maximum limit) In other words, = will the engine continue to produce the same or nearly the same power as = before I turned the secondaries off?? Yes=20 Bill B=20 =20 =20 ------=_NextPart_000_0008_01CA0458.4CB0D190 Content-Type: text/html; charset="us-ascii" Content-Transfer-Encoding: quoted-printable

Bill,

Comments embedded = below:

I should emphasize that the = observations I make are for only my EC2 which is set up for the 13B engine. A = controller set up for a piston engine with individual injectors for each cylinder = would be a different animal and probably incorporate a doubling of the pulse = width with the cold function and not have an injector backup mode. This is = just a guess on my part, though.

Steve Boese

-----Original = Message-----
From: Rotary motors in = aircraft [mailto:flyrotary@lancaironline.net] On Behalf Of Bill Bradburry
Sent: Tuesday, July 14, = 2009 7:03 AM
To: Rotary motors in = aircraft
Subject: [FlyRotary] Re: = cold switch and injector backup mode

Hi Steve,

I assume you are getting your information = from your data logger which means that you know what is really happening as = opposed to what someone thinks will happen. So tell me = this.

If I am flying in cruise at say, 8000 ft and = 24” of MAP, and I turn off the secondaries…What will = happen?. I was above the staging point and all = four injectors were on. I turned two of them off. Will the = primaries continue to run at the same duty cycle, or will they attempt to double = their duty cycle up to the max of 100%? Above the = staging point, if you have the system wired with the double pole switch so turning off the = secondaries also engages the cold function, the engine will run with the primaries = having doubled their duty cycle (up to the maximum limit) = In other words, will the engine continue to produce the same or nearly the = same power as before I turned the secondaries off?? Yes=

Bill B

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