X-Virus-Scanned: clean according to Sophos on Logan.com X-SpamCatcher-Score: 1 [X] Return-Path: Received: from ms-smtp-04.southeast.rr.com ([24.25.9.103] verified) by logan.com (CommuniGate Pro SMTP 5.1.6) with ESMTP id 1830866 for flyrotary@lancaironline.net; Sun, 11 Feb 2007 17:41:52 -0500 Received-SPF: pass receiver=logan.com; client-ip=24.25.9.103; envelope-from=eanderson@carolina.rr.com Received: from edward2 (cpe-024-074-103-061.carolina.res.rr.com [24.74.103.61]) by ms-smtp-04.southeast.rr.com (8.13.6/8.13.6) with SMTP id l1BMeuVm028539 for ; Sun, 11 Feb 2007 17:40:56 -0500 (EST) Message-ID: <000801c74e2d$6ebbba40$2402a8c0@edward2> From: "Ed Anderson" To: "Rotary motors in aircraft" References: Subject: Re: [FlyRotary] Re: Fuel Totalizer Date: Sun, 11 Feb 2007 17:39:03 -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 6.00.2900.3028 X-MIMEOLE: Produced By Microsoft MimeOLE V6.00.2900.3028 X-Virus-Scanned: Symantec AntiVirus Scan Engine Neat little gadget, Bob. Yes, it does require an input from your odometer to do its calculations otherwise all you will get is fuel flow - somewhat difficult to hook up to the aircraft's odometer {:>). But , yes, believe it could be possibly adapted for aircraft use - just rig up a circuit to connect to your GPS for the mileage data. Ed ----- Original Message ----- From: "Bob White" To: "Rotary motors in aircraft" Sent: Sunday, February 11, 2007 4:02 PM Subject: [FlyRotary] Re: Fuel Totalizer > That's how the trip computer works on my BMW motorcycle. I think they > run a counter when the injector is getting a pulse. At some > predetermined count, they reset the counter and increment the fuel > usage by 0.1. That little unit could probably be adapted to our > engines also, but the user interface really sucks. All the functions > are accessed with two push buttons. http://www.fuelplus.com/ $229 > > I did learn that the speedometer on the bike is electronic. It counts > a pulse from somewhere on the drive train for the odometer and > speedometer functions. > > Bob W. > > > On Sun, 11 Feb 2007 14:19:16 -0500 > "Ed Anderson" wrote: > >> MessageI'm not out of retirement yet! These things may just be a money >> hole {:>). >> >> The simple one uses the pulse duty cycle technique - it doesn't know (or >> care about staging). So the fuel flow at idle (before staging) will be >> double (assuming your are using 2 injectors before staging and 4 after >> staging) that when all injectors are staged. However, at idle, there is >> not a whole lot of interest in fuel flow and while it will be double the >> actual, it will change to reflect changes in A/F. You could divided it >> by 2 - provided you remembered to bring your calculator. {:>) >> >> The simply one does not have a fuel totalizer - just not possible with >> this approach. Well, I guess you could put in a circuit to integrate the >> instantaneous flow rate over some time period - but then the simple one >> starts not to be so simple anymore {:>) >> >> >> On the more advanced Monitor , I was working on a circuit to detect when >> there were no pulses on the secondary injectors indicating that staging >> had not yet occurred and to divide the fuel flow rate in half. >> >> However, the EC2 puts out a staging flag for the EM2 that I can more >> easily use to do the same thing. >> >> Either one would work on a Subaru set up as long as it uses electronic >> fuel injection. >> >> Ed >> >> >> >> ----- Original Message ----- >> From: Russell Duffy >> To: Rotary motors in aircraft >> Sent: Sunday, February 11, 2007 11:53 AM >> Subject: [FlyRotary] Re: Fuel Totalizer >> >> >> Simple/Inexpensive >> >> One is a simply Fuel Flow and Air/Fuel ratio (LED) indicator in a >> package small enough to fit in the 2 1/4" instrument hole. But, that is >> all the information it will provide - Fuel Flow and Air/Fuel Ratio. This >> will be the cheaper version. This will have a 10 segment LED bargraph >> for the Air/Fuel Ratio and a 3.5 digit LCD readout for the Fuel Flow. >> >> Hi Ed, >> >> Good to see you're giving up retirement. This will give you something >> more productive to do that cleaning up goose crap at the airport :-) >> >> I would imagine you will be able to sell quite a few of these simple >> versions to the Subaru folks that are using fuel injection. With that in >> mind, I'd suggest allowing for single injector (rather than staged >> injector) operation. At least I don't think the Subaru guys run staged >> injectors. >> >> Speaking of Subaru's, I have to admit that they sure run well in the >> gyro world. The Subaru is running on nearly all the two place gyros, and >> they just don't seem to be having any problems, even though they run high >> power virtually all the time. The gyro I'm training in has 1400 hours on >> it's engine! I'm not about to convert, but I can't help but be >> impressed. >> >> Cheers, >> Rusty >> > > > -- > N93BD - Rotary Powered BD-4 - http://www.bob-white.com > First Flight: 11/23/2006 7:50AM - 2.4 Hours Total Time > Cables for your rotary installation - http://www.roblinphoto.com/shop/ > > -- > Homepage: http://www.flyrotary.com/ > Archive and UnSub: http://mail.lancaironline.net/lists/flyrotary/