X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from cdptpa-omtalb.mail.rr.com ([75.180.132.120] verified) by logan.com (CommuniGate Pro SMTP 5.2.2) with ESMTP id 2879057 for flyrotary@lancaironline.net; Wed, 30 Apr 2008 17:39:54 -0400 Received-SPF: pass receiver=logan.com; client-ip=75.180.132.120; envelope-from=eanderson@carolina.rr.com Received: from edward2 ([75.191.186.236]) by cdptpa-omta04.mail.rr.com with SMTP id <20080430213915.JIKC2106.cdptpa-omta04.mail.rr.com@edward2> for ; Wed, 30 Apr 2008 21:39:15 +0000 Message-ID: <001001c8ab0a$a6c1cac0$2402a8c0@edward2> From: "Ed Anderson" To: "Rotary motors in aircraft" References: Subject: Re: [FlyRotary] Dual plugs Date: Wed, 30 Apr 2008 17:39:21 -0400 MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_000D_01C8AAE9.1F748150" X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 6.00.2900.3138 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.3198 This is a multi-part message in MIME format. ------=_NextPart_000_000D_01C8AAE9.1F748150 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable It continues to run just fine, Pat - that is if the ignition has been = reset so that both leading and trailing plugs far at nearly the same = time. In the automobile the leading and trailing plugs fire at = different degrees of rotation (I forget the exact difference). In the = case of the automobile a significant amount of power is lost if the = leading ignition system fails because the trailing one is set to fire at = a lest than optimum angle for power (mostly there for emissions = control). I have heard figures from 25-40% of power lost when just the = trailing are firing in the auto ignition set up.. OK, for aircraft usage (for example) Tracy Crooks EC2 changes the = standard Rx-7 ignition scheme such that both the trailing and leading = fire close to optimum. I have switched between the trailing and leading = while in flight and there is insignificant (if any) difference in rpm or = power. Hope this helps. Ed Ed Anderson Rv-6A N494BW Rotary Powered Matthews, NC eanderson@carolina.rr.com http://www.andersonee.com http://members.cox.net/rogersda/rotary/configs.htm#N494BW http://www.dmack.net/mazda/index.html=20 ----- Original Message -----=20 From: Patrick Panzera=20 To: Rotary motors in aircraft=20 Sent: Wednesday, April 30, 2008 5:13 PM Subject: [FlyRotary] Dual plugs How well does a rotary engine run if either the leading or trailing = plug goes bye-bye? =20 Thanks! =20 Pat ------=_NextPart_000_000D_01C8AAE9.1F748150 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable
It continues to run just fine, Pat - = that is if=20 the ignition has been reset so that both leading and trailing plugs far = at=20 nearly the same time.  In the automobile the leading and trailing = plugs=20 fire at different degrees of rotation (I forget the exact = difference).  In=20 the case of the automobile a significant amount of power is lost if the = leading=20 ignition system fails because the trailing one is set to fire at a lest = than=20 optimum angle for power (mostly there for emissions control).  I = have heard=20 figures from 25-40% of power lost when just the trailing are firing in = the auto=20 ignition set up..
 
OK, for aircraft usage (for example) = Tracy Crooks=20 EC2 changes the standard Rx-7 ignition scheme such that both the = trailing and=20 leading fire close to optimum.  I have switched between the = trailing and=20 leading while in flight and there is insignificant (if any) difference = in rpm or=20 power.
 
Hope this helps.
 
Ed
 
Ed Anderson
Rv-6A N494BW Rotary=20 Powered
Matthews, NC
eanderson@carolina.rr.comhttp://www.andersonee.com
http:/= /members.cox.net/rogersda/rotary/configs.htm#N494BW
http://www.dmack.net/mazda= /index.html 
----- Original Message -----
From:=20 Patrick Panzera =
Sent: Wednesday, April 30, 2008 = 5:13=20 PM
Subject: [FlyRotary] Dual = plugs

How well = does a=20 rotary engine run if either the leading or trailing plug goes=20 bye-bye?

 

Thanks!

 

Pat

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