X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from fed1rmmtao08.cox.net ([68.230.241.31] verified) by logan.com (CommuniGate Pro SMTP 5.1c.3) with ESMTP id 1358990 for flyrotary@lancaironline.net; Thu, 31 Aug 2006 23:22:13 -0400 Received-SPF: none receiver=logan.com; client-ip=68.230.241.31; envelope-from=alventures@cox.net Received: from fed1rmimpo01.cox.net ([70.169.32.71]) by fed1rmmtao08.cox.net (InterMail vM.6.01.06.01 201-2131-130-101-20060113) with ESMTP id <20060901032131.GUGW27846.fed1rmmtao08.cox.net@fed1rmimpo01.cox.net> for ; Thu, 31 Aug 2006 23:21:31 -0400 Received: from BigAl ([72.192.132.90]) by fed1rmimpo01.cox.net with bizsmtp id GrMT1V0081xAn3c0000000 Thu, 31 Aug 2006 23:21:27 -0400 From: "Al Gietzen" To: "'Rotary motors in aircraft'" Subject: RE: [FlyRotary] Re: EC2 Current Requirements Date: Thu, 31 Aug 2006 20:21:40 -0700 Message-ID: <000d01c6cd75$bde8b4d0$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 Importance: Normal In-Reply-To: X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.2962 Good point , Joe. I put in the normal fast acting blade type from the = auto parts store. It's on my list to get slow blow for the ignition = circuits. Al -----Original Message----- From: Rotary motors in aircraft [mailto:flyrotary@lancaironline.net] On Behalf Of Joe Ewen Sent: Thursday, August 31, 2006 4:35 PM To: Rotary motors in aircraft Subject: [FlyRotary] Re: EC2 Current Requirements Al, What type of 15A fuse did you blow? Not all fuses are created equal. = There are different trip characteristics for use in different applications. = The=20 first letter in the fuse number defines the trip characteristic for 6.am = fuses. A=3DFast Blow -Normally used on resistive loads that do = not=20 have inrush currents. i.e. heaters, illumination. G=3DUltra Fast Blow -Normally used on sensitive electronics. M=3DTime delay -Normally used on inductive loads to = handle=20 starting or inrush loads. i.e. transformers, motors. IMO time delay fuses should be used on the ignition coil circuits, they = will better tolerate the inrush current as they are inductive loads. = Breakers=20 are often available with different trip characteristic as well, = depending on the breaker family. I would not be suppressed in an application like you described if a = AGC15=20 would trip, but a MDA15 would hold. Joe ----- Original Message -----=20 From: "Al Gietzen" To: "Rotary motors in aircraft" Sent: Thursday, August 31, 2006 12:49 PM Subject: [FlyRotary] Re: EC2 Current Requirements I've designed in quite a bit of electrical dependancy, so the alternator-out running time has me concerned. With all injectors and coils on seperate switches, it should be possible to extend the range by switching off a set of injectors and the trailing coils, and accepting reduced power. Does that sound viable? ------------- I guess you meant "electrical redundancy". On my 20B install, a 15A fuse blew running 3 LS1 coils. 20A seems to be = OK. Does pulsing two injectors take more current than pulsing one injector = twice as long? Al -- Homepage: http://www.flyrotary.com/ Archive and UnSub: http://mail.lancaironline.net/lists/flyrotary/ -- Homepage: http://www.flyrotary.com/ Archive and UnSub: http://mail.lancaironline.net/lists/flyrotary/