X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from fed1rmmtao103.cox.net ([68.230.241.43] verified) by logan.com (CommuniGate Pro SMTP 5.1.9) with ESMTP id 2083986 for flyrotary@lancaironline.net; Mon, 04 Jun 2007 18:11:30 -0400 Received-SPF: none receiver=logan.com; client-ip=68.230.241.43; envelope-from=alventures@cox.net Received: from fed1rmimpo01.cox.net ([70.169.32.71]) by fed1rmmtao103.cox.net (InterMail vM.7.05.02.00 201-2174-114-20060621) with ESMTP id <20070604221052.PSTX14072.fed1rmmtao103.cox.net@fed1rmimpo01.cox.net> for ; Mon, 4 Jun 2007 18:10:52 -0400 Received: from BigAl ([72.192.132.90]) by fed1rmimpo01.cox.net with bizsmtp id 7aAr1X00e1xAn3c0000000; Mon, 04 Jun 2007 18:10:52 -0400 From: "Al Gietzen" To: "'Rotary motors in aircraft'" Subject: RE: [FlyRotary] Re: Houston, we have a problem... Date: Mon, 4 Jun 2007 15:11:53 -0800 Message-ID: <000701c7a6fd$bd18e310$6400a8c0@BigAl> MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: quoted-printable X-Priority: 3 (Normal) X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook, Build 10.0.6626 In-Reply-To: Importance: Normal X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.3028 Tracy does some magic stuff with that EC2. With a V8 there are always two injector firing at once. As best I can understand it, the fuel is squirted in sort of whenever and the engine sucks it in when it needs it. So for a 20B, he uses 3 signals for the injectors and one for the staging relay which applies power to the secondaries. Bob W. Unfortunately, taking that approach on the 20B version lead to a = back-door circuit to the secondary through the primary, allowing about 1/2 voltage pulses to the injectors that are turned off. It's going to take some = diodes in the injector circuit to cut that off. Haven't installed those yet. Al