X-Virus-Scanned: clean according to Sophos on Logan.com X-SpamCatcher-Score: 2 [X] Return-Path: Received: from ms-smtp-01.southeast.rr.com ([24.25.9.100] verified) by logan.com (CommuniGate Pro SMTP 5.1.7) with ESMTP id 1910354 for flyrotary@lancaironline.net; Thu, 08 Mar 2007 20:38:04 -0500 Received-SPF: pass receiver=logan.com; client-ip=24.25.9.100; 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-01.southeast.rr.com (8.13.6/8.13.6) with SMTP id l291avGr009026 for ; Thu, 8 Mar 2007 20:36:57 -0500 (EST) Message-ID: <001401c761eb$6d6605c0$2402a8c0@edward2> From: "Ed Anderson" To: "Rotary motors in aircraft" References: Subject: Re: [FlyRotary] Re: The truth??? / Injector flow rate mystery solved Date: Thu, 8 Mar 2007 20:36:57 -0500 MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_0011_01C761C1.8443B280" 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 This is a multi-part message in MIME format. ------=_NextPart_000_0011_01C761C1.8443B280 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable MessageTracy and I have been discussing this injector flow rate anomaly = for years - it really bothered me to do the math for my algorithms based = on their stated flow-rate specs and then to have to put a "fudge" factor = in the equation to make it "correct". I don't mind a fudge factor if I = know why its required - but, putting one in and not knowing why bugs me = a bit. Fortunately, once Tracy reveals his secret (may cost me a dinner and = some hauling help {:>)) I can develop the correct constants for the = equation. Nope, I learned my lesson - firmware is to software like = analog designs are to hardware - you have to rebuild even for a small = change {:>) Hey the HKS is a good little engine in my opinion - not as good as a = light weight rotary (which we don't have yet - Richard! get a move on = {:>)), but it'll get you flying again. Ed ----- Original Message -----=20 From: Russell Duffy=20 To: Rotary motors in aircraft=20 Sent: Thursday, March 08, 2007 7:39 PM Subject: [FlyRotary] Re: The truth??? / Injector flow rate mystery = solved The only thing I could ever come up with was that Mazda rated the = injectors at 85% flow and we were flowing them closer to 100% - but, = that rational never really convinced me. =20 I always thought that was part of it, plus the fact that Mazda runs = their fuel pressure lower than the "standard" of 3 bar, or about 43.5 = psi. =20 Don't worry Ed, I'm sure Tracy will tell you what he found right after = you finish your final firmware version :-) Rusty (maybe an HKS to start with on the Dominator) ------=_NextPart_000_0011_01C761C1.8443B280 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Message
Tracy and I have been discussing this = injector flow=20 rate anomaly for years - it really bothered me to do the math for my = algorithms=20 based on their stated flow-rate specs and then to have to put a "fudge" = factor=20 in the equation to make it "correct".  I don't mind a fudge factor = if I=20 know why its required - but, putting one in and not knowing why bugs me = a=20 bit.
 
Fortunately, once Tracy reveals his = secret (may=20 cost me a dinner and some hauling help {:>)) I can develop the = correct=20 constants for the equation.  Nope, I learned my lesson = -  =20 firmware is to software  like analog designs are to =  hardware -=20 you have to rebuild even for a small change {:>)
 
Hey the HKS is a good little engine in = my opinion -=20 not as good as a light weight rotary (which we don't have yet - Richard! = get a=20 move on {:>)), but it'll get you  flying again.
 
Ed
----- Original Message -----
From:=20 Russell=20 Duffy
Sent: Thursday, March 08, 2007 = 7:39=20 PM
Subject: [FlyRotary] Re: The = truth??? /=20 Injector flow rate mystery solved

The only thing I could ever = come up=20 with  was that Mazda rated the injectors at 85% flow and we were = flowing=20 them closer to 100% - but, that rational never really convinced=20 me.   
 
I always thought that was part of it, plus the = fact that=20 Mazda runs their fuel pressure lower than the "standard" of 3 bar, or = about=20 43.5 psi.  
 
Don't worry Ed, I'm sure Tracy will tell = you what he=20 found right after you finish your final firmware version=20 :-)
 
Rusty (maybe an HKS to start with on the=20 Dominator)
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