X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from mail-ey0-f180.google.com ([209.85.215.180] verified) by logan.com (CommuniGate Pro SMTP 5.3.11) with ESMTPS id 4664691 for flyrotary@lancaironline.net; Wed, 05 Jan 2011 09:33:34 -0500 Received-SPF: pass receiver=logan.com; client-ip=209.85.215.180; envelope-from=msteitle@gmail.com Received: by eyf18 with SMTP id 18so6594114eyf.25 for ; Wed, 05 Jan 2011 06:32:59 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=gamma; h=domainkey-signature:mime-version:received:received:in-reply-to :references:date:message-id:subject:from:to:content-type; bh=uIetD9a+uCsgpaq8Lp1L+/a+YHbN8MZu3HZEIo1uXtA=; b=MKoQ6DQZ1JIKyhN4KI8L+IFutGiY70TeSy461ja6uiDhpyjprmq7F2FXot1VW88o7H CZW9R2J3FBd8q1PH2taBX+zpnX8uHuGemZbTASV7Fz4qtME9SqxVjx2JfUnYxNFJTfMu PVMUfDeTH3qvVzs1HQ4Neh5qsfBz4piy1v0ME= DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=mime-version:in-reply-to:references:date:message-id:subject:from:to :content-type; b=KJsOPweNNqQbdZ7NmmGuuk3tBaqVROSekSEuQWpGJFO5FMXCtlXPN2yuuf+YAWOYFk 9EB9U8nOWudgzGVRuCGeYA/snoNyGzC+u3tDUpIPXaeN7rwEhFRjOCTXw3xOX8Z1Cejc TwEx+u2X+jRxLmtEQrJBYRH5UePimsSePMfMI= MIME-Version: 1.0 Received: by 10.213.27.68 with SMTP id h4mr17507999ebc.10.1294237979411; Wed, 05 Jan 2011 06:32:59 -0800 (PST) Received: by 10.213.33.206 with HTTP; Wed, 5 Jan 2011 06:32:59 -0800 (PST) In-Reply-To: References: Date: Wed, 5 Jan 2011 08:32:59 -0600 Message-ID: Subject: Re: [FlyRotary] Re: GM Coil Comparison From: Mark Steitle To: Rotary motors in aircraft Content-Type: multipart/alternative; boundary=0015174c0d9404849704991a4378 --0015174c0d9404849704991a4378 Content-Type: text/plain; charset=windows-1252 Content-Transfer-Encoding: quoted-printable OK Al, I'll tell you my reason for upgrading. My engine has always had an occasional intermittent misfire, usually on climbout but occasionally in cruise. It happens infrequently just to one compression cycle and then it clears up. Obviously, this does not instill confidence with pax, or myself either. I've tried various solutions, but the problem persists. I'm hopin= g the hotter spark from the 585 coils will cure this annoying problem. I'll report back after installing the new coils and test flying. Mark S. On Wed, Jan 5, 2011 at 12:13 AM, Al Gietzen wrote: > So I=92m still waiting for an answer to the question I posed a few day= s > back. Do we have any real evidence that the higher current spark is neede= d > in our application; or is going to result in any better performance? > > > > Perhaps it=92s obvious to someone, but I=92m wondering whether it compara= ble to > watts/channel on a stereo. 50 per channel into good speakers is enough to > drive you out of your home; but the salesperson will try to convince you > that 1000 watts must be 10 times better. The D580 certainly makes a very > good spark, which ignites the mixture just fine. Once the arc is made an= d > the fuel molecules are burning, does 120 ma spark give you anything that = a > 60 ma spark doesn=92t if the voltage is the same? Presumably it is just = a > matter of spark duration. > > > > Save me the need to do some researchJ > > > > Al > --0015174c0d9404849704991a4378 Content-Type: text/html; charset=windows-1252 Content-Transfer-Encoding: quoted-printable
OK Al, I'll tell you my reason for upgrading.=A0 My engine has alw= ays had an occasional intermittent misfire, usually on climbout but occasio= nally in cruise.=A0 It happens infrequently just to one compression cycle a= nd then it clears up.=A0=A0Obviously, this does not instill confidence with= pax, or myself either.=A0 I've tried various solutions, but the proble= m persists.=A0 I'm hoping the hotter spark from the 585 coils will cure= this annoying problem.=A0 I'll report back after installing the new co= ils=A0and test flying.
=A0
Mark S.

On Wed, Jan 5, 2011 at 12:13 AM, Al Gietzen <ALVentures@cox.net<= /a>> wrote:

So I=92m st= ill waiting for an answer to the question I posed a few days back. Do we ha= ve any real evidence that the higher current spark is needed in our applica= tion; or is going to result in any better performance?

=A0<= /font>

Perhaps it= =92s obvious to someone, but I=92m wondering whether it comparable to watts= /channel on a stereo. 50 per channel into good speakers is enough to drive = you out of your home; but the salesperson will try to convince you that 100= 0 watts must be 10 times better. =A0The D580 certainly makes a very good sp= ark, which ignites the mixture just fine. =A0Once the arc is made and the f= uel molecules are burning, does 120 ma spark give you anything that a 60 ma= spark doesn=92t if the voltage is the sam=A0<= /font>

Save me the= need to do some researchJ

=A0<= /font>

Al


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