Return-Path: Sender: (Marvin Kaye) To: flyrotary@lancaironline.net Date: Fri, 27 Feb 2004 15:40:04 -0500 Message-ID: X-Original-Return-Path: Received: from fed1mtao08.cox.net ([68.6.19.123] verified) by logan.com (CommuniGate Pro SMTP 4.1.8) with ESMTP id 3048312 for flyrotary@lancaironline.net; Fri, 27 Feb 2004 14:14:17 -0500 Received: from smtp.west.cox.net ([172.18.180.51]) by fed1mtao08.cox.net (InterMail vM.5.01.06.08 201-253-122-130-108-20031117) with SMTP id <20040227191415.VHZN5081.fed1mtao08.cox.net@smtp.west.cox.net> for ; Fri, 27 Feb 2004 14:14:15 -0500 From: Dale Rogers X-Original-To: "Rotary motors in aircraft" Subject: Re: [FlyRotary] Re: EC2 - No spark problem X-Original-Date: Fri, 27 Feb 2004 14:14:15 -0500 MIME-Version: 1.0 Content-Type: multipart/mixed; boundary="----=____1077909255147_sy(PDmnWhE" X-Original-Message-Id: <20040227191415.VHZN5081.fed1mtao08.cox.net@smtp.west.cox.net> This is a multi-part message in MIME format. ------=____1077909255147_sy(PDmnWhE Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit John, You wrote: > 4. And the winner......12v supply to lead coils suspect. It tested as 12V, > but the plugs wouldn't spark. When I cross wired to the trailing coil supply > the plugs sparked. I thought volts were volts. Apparantly not. Volts ARE volts, but the work gets done by the Amperes. Check to make certain that the wire size to each coil is large enough to carry the maximum current the coils can draw. Check for high-resistance joints (e.g. cold solder, too small crimp surface, too little crimping force) in each coil's supply. Dale R. COZY MkIV-R #1254 ------=____1077909255147_sy(PDmnWhE Content-Type: text/html; name="reply" Content-Disposition: inline; filename="reply" Message
Thanks for all the input.
After a few calls to Tracy and a little help from Buly I tracked down the problem(s) and last night.
She went BrrrraaaaPPP for the first time at 9pm. What a beautiful sound! Not just because I wanted to hear it, but also because it truely IS a beautiful sound. Somewhere between a deep growl and race car whine it spoke of power and precision. I'm looking forward to hearing it again today - this time I'll turn the fuel pump on so I get more than 6 seconds worth. :)
 
The problems were -
1. Crank Angle Sensors too far away from trigger wheel - added a thin washer
2. CAS wiring reversed - pulse should be positive as you approach quickly with steel.
3. Cranking voltage/speed too low
4. And the winner......12v supply to lead coils suspect. It tested as 12V, but the plugs wouldn't spark. When I cross wired to the trailing coil supply the plugs sparked. I thought volts were volts. Apparantly not.
 
Many thanks to Tracy for his instant availability, patience and encouragement.
John (this is where I get my own back on the spam cans doing run ups outside my hangar door)
 
 
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