X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from [216.254.141.172] (HELO mail-05.primus.ca) by logan.com (CommuniGate Pro SMTP 5.1.12) with ESMTP id 2306001 for flyrotary@lancaironline.net; Sun, 02 Sep 2007 01:18:23 -0400 Received-SPF: none receiver=logan.com; client-ip=216.254.141.172; envelope-from=cbeazley@innovista.net Received: from cpe006067657509-cm001947577aea.cpe.net.cable.rogers.com ([74.104.230.84] helo=[192.168.0.101]) by mail-05.primus.ca with esmtpa (Exim 4.63) (envelope-from ) id 1IRhpx-0008HY-0d for flyrotary@lancaironline.net; Sun, 02 Sep 2007 01:17:29 -0400 Message-ID: <46DA48BD.1020006@innovista.net> Date: Sun, 02 Sep 2007 01:23:09 -0400 From: cbeazley User-Agent: Thunderbird 2.0.0.6 (Windows/20070728) MIME-Version: 1.0 To: Rotary motors in aircraft Subject: RE: Which type resistors for the EC2. Trouble narrowed down. Content-Type: multipart/alternative; boundary="------------020205070904080101080104" X-Authenticated: cbeazley - cpe006067657509-cm001947577aea.cpe.net.cable.rogers.com ([192.168.0.101]) [74.104.230.84] This is a multi-part message in MIME format. --------------020205070904080101080104 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit > > I now have to definitely recommend the installation of injector > disable switches. In my recent flights I have come upon periods of > extreme mixture variations and rough running engine. Because of the > injector disable switches, I have been able to trace the problem to > the secondary injectors (somewhere in that circuit). Of course, the > fact that I recently installed the disable switches remains as a > possible cause of my problems, but that is irrelevant. > > To further narrow the hunt, I would like to simply install a > different pair of secondary injectors, which I happen to have lying > around. trouble is, they are peak-and-hold type and require resistors > per Tracys instructions. I thought I would just run out to radioshack > this morning and pick some up. But I see that it is not that easy. > Tracy calls for 5 ohm 25 watt resistors. Radio shack does not sell > anything like that. Digikey has 2 types with that rating, thick film > and wire wound. For those of you who hear electronic speak and it > does not sound like "blah blah voltage blah blah", does it matter > which type I order? The wire wound are about half the price, but that > matters not. I just want to keep the magic smoke inside the box and > the propeller going round and round. > > Suggestions? > > -- > David Leonard > > Turbo Rotary RV-6 N4VY > http://N4VY.RotaryRoster.net > http://RotaryRoster.net Hi David; These type are recommended for Megasquirt ECUs: http://www.digikey.com/scripts/DkSearch/dksus.dll?Detail?name=825F5R0-ND Spec sheet: http://www.megamanual.com/v22manual/ohmite89.pdf Cheers Cary --------------020205070904080101080104 Content-Type: text/html; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit

I now have to definitely recommend the installation of injector disable switches. In my recent flights I have come upon periods of extreme mixture variations and rough running engine. Because of the injector disable switches, I have been able to trace the problem to the secondary injectors (somewhere in that circuit). Of course, the fact that I recently installed the disable switches remains as a possible cause of my problems, but that is irrelevant.

To further narrow the hunt, I would like to simply install a different pair of secondary injectors, which I happen to have lying around. trouble is, they are peak-and-hold type and require resistors per Tracys instructions. I thought I would just run out to radioshack this morning and pick some up. But I see that it is not that easy. Tracy calls for 5 ohm 25 watt resistors. Radio shack does not sell anything like that. Digikey has 2 types with that rating, thick film and wire wound. For those of you who hear electronic speak and it does not sound like "blah blah voltage blah blah", does it matter which type I order? The wire wound are about half the price, but that matters not. I just want to keep the magic smoke inside the box and the propeller going round and round.

Suggestions?

--
David Leonard

Turbo Rotary RV-6 N4VY
http://N4VY.RotaryRoster.net
http://RotaryRoster.net

Hi David;

These type are recommended for Megasquirt ECUs:
http://www.digikey.com/scripts/DkSearch/dksus.dll?Detail?name=825F5R0-ND
Spec sheet:
http://www.megamanual.com/v22manual/ohmite89.pdf

Cheers
Cary

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