X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from mail-bw0-f226.google.com ([209.85.218.226] verified) by logan.com (CommuniGate Pro SMTP 5.3c2) with ESMTP id 3984975 for flyrotary@lancaironline.net; Sat, 21 Nov 2009 17:25:33 -0500 Received-SPF: pass receiver=logan.com; client-ip=209.85.218.226; envelope-from=msteitle@gmail.com Received: by bwz26 with SMTP id 26so4401483bwz.27 for ; Sat, 21 Nov 2009 14:24:57 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=gamma; h=domainkey-signature:mime-version:received:in-reply-to:references :date:message-id:subject:from:to:content-type; bh=j8ufnZ5LLKFIed68n28wJyE9ViTO6JzrB1IWHFz9GO8=; b=Rfx51vThi0INGkxZs3NzJaNnJ00cMtLfMbvGbiAWNEji5V6SyFBOzpDOsskQR9noM/ rephzYSCChpt9eXtt2zpY5WFpmSk4yaPBFbFG5Mm4s+TXcXpCUuLHyiffyG6quZSJTQn cCYtrCBu8U6EgtiFRNjx6yOoQoyFvgsRilysc= 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=JvkjLElDYYS+fYcxlVYEWlWNqKzaMFxst3jlAOn5b1nhwldEAoHnc83MJ9qCUf9oDq W+nNuDqzE5dBcBtnqd6xYtc95b0Tr8X/iPOJLtqvGre+2FIGq4FClzzS1wt0gVPMKWa6 RLCgSoUffv1pgWvLUyxvVQjfzSl1AIfnNx+dg= MIME-Version: 1.0 Received: by 10.204.26.152 with SMTP id e24mr3033422bkc.119.1258842296397; Sat, 21 Nov 2009 14:24:56 -0800 (PST) In-Reply-To: References: Date: Sat, 21 Nov 2009 16:24:56 -0600 Message-ID: <5cf132c0911211424u61bc324ana0f469079daa7b78@mail.gmail.com> Subject: Re: [FlyRotary] Re: No start From: Mark Steitle To: Rotary motors in aircraft Content-Type: multipart/alternative; boundary=000325559896e7b0440478e90f3a --000325559896e7b0440478e90f3a Content-Type: text/plain; charset=ISO-8859-1 Steve, Early on with my project, I was beginning to start/run the engine. I quickly discovered that sometimes it would start, and sometimes it wouldn't. If the battery voltage dropped to some unknown voltage the engine would not start, even though it would continue to crank (although slower than normal). I didn't have a working charging system at the time, so the battery would get weaker and weaker as I continued down this road. At the time I was using a 12v Panasonic emergency backup supply battery. It didn't have the CCA to do more than one or two cranks before the voltage dropped too low to possibly start the engine. I must have damaged the battery in the process as a new battery solved the problem. You stated that you installed a new battery, but you didn't state if you charged it up before trying to start your engine. I suggest you 1) charge the new battery to 100%, 2) hook up the starter to a spare battery for cranking. Personally, I think this makes a good case for going with a 24v system. Mark S. On Sat, Nov 21, 2009 at 12:40 PM, Steven W. Boese wrote: > Steve, > > I was able to produce symptoms similar to what you describe by inserting a > 1.5 V flashlight battery into the CAS return wire such that the CAS end of > the wire was 1.5 V more negative than the CAS return wire going to the EC2: > CAS ----- battery ++++ EC2 > > The opposite polarity didn't cause problems. With the battery installed, > there are one or two sparks when starting to turn the CAS and then no more > sparks until the CAS sensor is turning significantly faster than would be > the case when turning the engine with the starter. > > It seems that you may have the CAS return grounded in addition to the > connection to the EC2. If this is the case, then the voltage drop from the > starter current may shift the CAS return voltage similar to what I did with > the test setup. If I disconnect the CAS from the EC2 at the EC2 connector, > all the CAS wires show infinite resistance to ground. It might be useful to > see if your wiring is similar. > > Steve Boese > > > > -- > Homepage: http://www.flyrotary.com/ > Archive and UnSub: > http://mail.lancaironline.net:81/lists/flyrotary/List.html > --000325559896e7b0440478e90f3a Content-Type: text/html; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable
Steve,
=A0
Early on=A0with my project, I was beginning to start/run the engine.= =A0 I quickly discovered that sometimes it would start, and sometimes it wo= uldn't.=A0 If the battery voltage dropped to some unknown voltage the e= ngine would not start, even though it would continue to crank (although slo= wer than normal).=A0 I didn't have=A0a working charging system at the t= ime, so the battery would get weaker and weaker as I continued down this ro= ad.=A0=A0At the time I was using a 12v Panasonic emergency backup supply ba= ttery.=A0 It didn't have the CCA to do more than one or two cranks befo= re the voltage dropped too low to possibly start the engine.=A0 I must have= damaged the battery in the process as=A0a new battery solved the problem.= =A0 You stated that you installed a new battery, but you didn't state i= f you charged it up before trying to start your engine.=A0
=A0
I suggest you 1) charge the new battery to 100%, 2) hook up the starte= r to a spare battery for cranking.=A0
=A0
Personally, I think this makes a good case for going with a 24v system= .=A0
=A0
Mark S.
=A0


=A0
On Sat, Nov 21, 2009 at 12:40 PM, Steven W. Boes= e <SBoese@uwyo.edu<= /a>> wrote:
Steve,

I was able to prod= uce symptoms similar to what you describe by inserting a 1.5 V flashlight b= attery into the CAS return wire such that the CAS end of the wire was 1.5 V= more negative than the CAS return wire going to the EC2:
CAS ----- battery ++++ EC2

The opposite polarity didn't cause pr= oblems. =A0With the battery installed, there are one or two sparks when sta= rting to turn the CAS and then no more sparks until the CAS sensor is turni= ng significantly faster than would be the case when turning the engine with= the starter.

It seems that you may have the CAS return grounded in addition to the c= onnection to the EC2. =A0If this is the case, then the voltage drop from th= e starter current may shift the CAS return voltage similar to what I did wi= th the test setup. =A0If I disconnect the CAS from the EC2 at the EC2 conne= ctor, all the CAS wires show infinite resistance to ground. =A0It might be = useful to see if your wiring is similar.

Steve Boese

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