X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from mtiwmhc11.worldnet.att.net ([204.127.131.115] verified) by logan.com (CommuniGate Pro SMTP 5.0.7f) with ESMTP id 950397 for flyrotary@lancaironline.net; Mon, 23 Jan 2006 10:54:33 -0500 Received-SPF: none receiver=logan.com; client-ip=204.127.131.115; envelope-from=keltro@att.net Received: from 204.127.135.75 ([204.127.135.75]) by worldnet.att.net (mtiwmhc11) with SMTP id <2006012315534711100nau5me>; Mon, 23 Jan 2006 15:53:47 +0000 Received: from [64.136.27.229] by 204.127.135.75; Mon, 23 Jan 2006 15:53:46 +0000 From: keltro@att.net (Kelly Troyer) To: "Rotary motors in aircraft" Subject: Re: Injector pulseing ? Tracy ? Date: Mon, 23 Jan 2006 15:53:46 +0000 Message-Id: <012320061553.17416.43D4FC0800012101000044082160466648019D9B040A05@att.net> X-Mailer: AT&T Message Center Version 1 (Nov 10 2005) X-Authenticated-Sender: a2VsdHJvQGF0dC5uZXQ= MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="NextPart_Webmail_9m3u9jl4l_17416_1138031626_0" --NextPart_Webmail_9m3u9jl4l_17416_1138031626_0 Content-Type: text/plain Content-Transfer-Encoding: 8bit Tracy, Sorry to beat this to death but I am a little dense......If injectors fire on the intake cycle of their respective rotor and are not batch fired and the intake cycles of the rotors are phased 180 degrees of the eccentric shaft apart how do you avoid pulseing the injectors every 180 degrees (twice per eccentric shaft rotation) ?? -- Kelly Troyer Dyke Delta/13B/RD1C/EC2 -------------- Original message from "Tracy Crook" : -------------- Yes, Ed has it correct. I would add that the injection is not batch fired but is port, i.e., the injection pulse is timed to coincide with the intake stroke of the rotor it is feeding. Tracy ----- Original Message ----- From: Ed Anderson To: Rotary motors in aircraft Sent: Sunday, January 22, 2006 11:46 PM Subject: [FlyRotary] Re: Injector pulseing ? Tracy ? Dean, Here's my take on it. For all six faces to go through their cycle requires 1080 deg of e shaft rotation. So if you have six faces (3 x 2 rotors) then each face requires 1080/6 = 180 degrees of e shaft rotation to complete its cycle. So two faces (one on each rotor) would complete their cycle (intake, compression, combustion, exhaust) in 360 deg of the e shaft rotation. I believe the EC2 fires all four injectors (assuming it has staged) once during that 360 deg rotation of the e eshaft providing sufficient fuel for the two faces (approx 2 x 40 cid = 80 cid) of ingested air/fuel mixture. But, Tracy is obviously the one who really knows {:>) Ed A --NextPart_Webmail_9m3u9jl4l_17416_1138031626_0 Content-Type: text/html Content-Transfer-Encoding: 8bit
Tracy,
 Sorry to beat this to death but I am a little dense......If  injectors fire on the intake cycle
of their respective rotor and are not batch fired and the intake cycles of the rotors are
phased 180 degrees of the eccentric shaft apart how do you avoid pulseing the injectors
every 180 degrees (twice per eccentric shaft rotation) ??
--
Kelly Troyer
Dyke Delta/13B/RD1C/EC2




-------------- Original message from "Tracy Crook" <lors01@msn.com>: --------------

Yes, Ed has it correct.  I would add that the injection is not batch fired but is port,  i.e., the injection pulse is timed to coincide with the intake stroke of the rotor it is feeding.
 
Tracy
----- Original Message -----
Sent: Sunday, January 22, 2006 11:46 PM
Subject: [FlyRotary] Re: Injector pulseing ? Tracy ?


Dean,

Here's my take on it.   For all six faces to go through their cycle requires
1080 deg of e shaft rotation.  So if you have six faces (3 x 2 rotors) then
each face requires 1080/6 = 180 degrees of e shaft rotation to complete its
cycle.  So two faces (one on each rotor) would complete their cycle (intake,
compression, combustion, exhaust) in 360 deg of the e shaft rotation.

I believe the EC2 fires all four injectors (assuming it has staged) once
during that 360 deg rotation of the e eshaft providing sufficient fuel for
the two faces (approx 2 x 40 cid = 80 cid) of ingested air/fuel mixture.

But, Tracy is obviously the one who really knows {:>)

Ed A

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