X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from alnrmhc11.comcast.net ([206.18.177.51] verified) by logan.com (CommuniGate Pro SMTP 5.1.0) with ESMTP id 1489419 for flyrotary@lancaironline.net; Fri, 20 Oct 2006 14:35:50 -0400 Received-SPF: none receiver=logan.com; client-ip=206.18.177.51; envelope-from=wschertz@comcast.net Received: from 7n7z201 (c-24-7-194-231.hsd1.il.comcast.net[24.7.194.231]) by comcast.net (alnrmhc11) with SMTP id <20061020183528b11008efnve>; Fri, 20 Oct 2006 18:35:28 +0000 Message-ID: <027501c6f476$7f565380$e7c20718@7n7z201> From: "Bill Schertz" To: "Rotary motors in aircraft" References: Subject: Re: [FlyRotary] Re: Injector Switches !!! was Re: Powering fuel injectors Date: Fri, 20 Oct 2006 13:35:20 -0500 MIME-Version: 1.0 Content-Type: text/plain; format=flowed; charset="iso-8859-1"; reply-type=original Content-Transfer-Encoding: 7bit X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 6.00.2900.2869 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.2962 I believe that the wire from the battery to behind the panel is 'protected' by the use of a contactor that will break the circuit when you throw the switch. The 'six inch' recommendation is for a wire that is not removable from the circuit by either the contactor or a fuse/breaker. Bill Schertz KIS Cruiser # 4045 ----- Original Message ----- From: "John Downing" To: "Rotary motors in aircraft" Sent: Friday, October 20, 2006 12:24 PM Subject: [FlyRotary] Re: Injector Switches !!! was Re: Powering fuel injectors > Greg; If the CB's are to only be 6" to 1' from the battery, there are > alot > of old Pipers flying with the battery behind the seats and the CB;s on the > panel, which have a condition. My Tri-Pacer is 45 years old and it does > not > know the difference. JohnD > ----- Original Message ----- > From: "Greg" > To: "Rotary motors in aircraft" > Sent: Friday, October 20, 2006 9:55 AM > Subject: [FlyRotary] Re: Injector Switches !!! was Re: Powering fuel > injectors > > >> Thanks for that Ed, I am using the EC2 but I hadn't gone through the >> install of it thoroughly yet and wasn't aware of that mode. I'll make > sure >> that it's done now. >> >> I follow what you're saying about breakers instead of fuses and I have to >> agree, but following the Bob Nuckolls school of wiring means that the >> fuses/breakers should be no more than 6" to a foot from the power source >> (battery) and the batteries are behind the rear baggage area and no where >> near the panel. The argument for the fuses to be near the source of >> electric power is also valid considering the fuses are there to protect > the >> wiring. >> >> Greg >> >> >> > Hi Greg, >> > >> > Looks like a good electrical system over all. However, I would not >> > feel comfortable with fuses in my critical system power line. But, I > see >> > that you are routing two power sources to each switch of your critical >> > system which means if one fuse blows due to a transit spike, the other >> > one, hopefully, will not. Again, this is my own personal bias against >> > fuses in critical systems - there are arguments to the contrary for > sure. >> > >> > One thing I did notice, is looking at your injector power switches, I >> > am >> > not certain if these are meant to be the same as Tracy Crook's Injector >> > disable switches. If they are (and they may not be), I do not see the >> > connection that automatically grounds the "cold Start" mode in the EC2 >> > when either injector pair are disabled (turned off). >> > >> > This may be a detail just not shown on the drawing - but it is > crucially >> > important. If the injector power switch does not have the "cold start" >> > grounding provision, then if you ever switch off one of the injector >> > pairs, your fuel flow will drop approx by 1/2 half. The reason is that >> > (with Tracy's recommended switch set up) when you turn off one pair of >> > injectors , that automatically grounds the "cold start" pin which > causes >> > the EC2 to double the duration of the PW (Pulse Width) signal to the >> > remaining injector pair. This in turn doubles the amount of fuel from > the >> > active pair of injectors. If the "cold start" is not activated (by >> > automatic grounding of the cold start pin through a DPDT switch) when >> > an >> > injector pair is switched off, then the PW signal does NOT double and > the >> > fuel flow through the one injector pair will only be 1/2 of what the >> > engine needs. >> > >> > >> > Ed >> > >> > Ed Anderson >> > Rv-6A N494BW Rotary Powered >> > Matthews, NC >> > eanderson@carolina.rr.com >> > http://members.cox.net/rogersda/rotary/configs.htm#N494BW >> > http://www.dmack.net/mazda/index.html >> > >> > ----- Original Message ----- >> > From: "Greg@itmack" >> > To: "Rotary motors in aircraft" >> > Sent: Friday, October 20, 2006 3:33 AM >> > Subject: [FlyRotary] Re: Powering fuel injectors >> > >> > >> >> I'm trying to keep the number of switched down as well, I attached a > pdf >> >> with my schematic which is a work in progress for your review. >> >> >> >> I have noted that a lot of builders reduce a lot of this complexity by >> >> just >> >> hanging everything off 1 or 2 fuses which is fine until a fuse blows > and >> >> then everything stops. >> >> >> >> Greg RV8 down under >> >> >> >> >> >> >> >>>I am using Z-19 from the Aeroelectric Connection as a guide for wiring >> >>> my plane. I would like to power the injectors from the battery buss. >> >>> Looking at Z-19, do I need to install a complete switch and diode > system >> >>> for the injectors like is done for the fuel pump and ECU, or can I >> >>> tie >> >>> on to the fuel pump OR the ECU system after either the switch (add a >> >>> separate diode) or after one of the diodes? >> >>> There will be the two DPDT switches to disable the primary and > secondary >> >>> injectors after this connection. >> >>> My panel is becoming somewhat switch festooned and I would like to > keep >> >>> more switches to a minimum. >> >>> How have you guys accomplished this? >> >>> >> >>> Thanks. >> >>> Bill B >> >>> >> >>> >> >>> -- >> >>> 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/ >> >> >> > >> > >> > >> > -- >> > 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/ > > > -- > Homepage: http://www.flyrotary.com/ > Archive and UnSub: http://mail.lancaironline.net/lists/flyrotary/