X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Sender: To: lml@lancaironline.net Date: Wed, 10 Sep 2008 21:29:55 -0400 Message-ID: X-Original-Return-Path: Received: from smtp108.sbc.mail.re2.yahoo.com ([68.142.229.97] verified) by logan.com (CommuniGate Pro SMTP 5.2.7) with SMTP id 3122721 for lml@lancaironline.net; Wed, 10 Sep 2008 11:18:12 -0400 Received: (qmail 56397 invoked from network); 10 Sep 2008 15:18:11 -0000 DomainKey-Signature: a=rsa-sha1; q=dns; c=nofws; s=s1024; d=swbell.net; h=Received:X-YMail-OSG:X-Yahoo-Newman-Property:Message-ID:From:To:References:Subject:Date:MIME-Version:Content-Type:X-Priority:X-MSMail-Priority:X-Mailer:X-MimeOLE; b=rd/IkZ6He9r93jcA0TXtdbmSQRKxx91Q3BJujC0vRwBkPZo50AahgfthGljrVg79STSj6tVHEm2ZwuFIl0WNSxu3Y8eAjzn82s6DnlLuSKuvOXwP77IGvYiPG7XwAs9w/y4SVhUWooVr5KV9elOLNs4oBMHGn04dD4/7v44jqNs= ; Received: from unknown (HELO eaglenest61) (gbfitz@swbell.net@99.144.115.237 with login) by smtp108.sbc.mail.re2.yahoo.com with SMTP; 10 Sep 2008 15:18:10 -0000 X-YMail-OSG: XOGn9kkVM1n8ygqx8gJB8rMEAdJVRgdD77kAVmwYhvHIP_is5Ot3BBVUHu455WibWkZDp6omx2S5pUgYMAJpdO4OI9yz0NSm56HkcBMOROwQsucw9gH1LpfffoZKfY0- X-Yahoo-Newman-Property: ymail-3 X-Original-Message-ID: <003f01c91357$d616f100$4001a8c0@eaglenest61> From: "Gary Fitzgerald" X-Original-To: "Lancair Mailing List" References: Subject: [LML] Re: Part 23 vs Guaranteed Safety X-Original-Date: Wed, 10 Sep 2008 10:13:52 -0500 MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_003C_01C9132D.ECBF0ED0" X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 6.00.2800.1807 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1896 This is a multi-part message in MIME format. ------=_NextPart_000_003C_01C9132D.ECBF0ED0 Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable Mark, Actually, the computer-controlled ignition and fuel injection systems = WERE originally developed to meet a "certification process", but not one = based on safety or reliability (directly). They were developed = primarily to meet emissions and mileage certifications. Once the auto = makers got the basics down (like keeping the engines running at 14.7:1 = air to fuel ratio in cruise to ensure maximum burn and operation of the = catalytic converter), and CPU speeds increased and better sensors were = developed, the engine control system developers realized they could give = their engines different "personalities" at each end of the performance = spectrum, hence innovations like staged injectors and other cool stuff. The "reliability" factor has only been directly addressed for about the = last 10 years, with these same controllers (or, more accurately, their = 32-bit decendents) performing on-board diagnostic functions. Gary Fitzgerald LNC2 extra-slow build ~70% engine: TBD St. Charles, MO ----- Original Message -----=20 From: marknlisa@hometel.com=20 To: lml@lancaironline.net=20 Sent: Tuesday, September 09, 2008 6:40 PM Subject: [LML] Re: Part 23 vs Guaranteed Safety I believe if those managing the FAA were truly concerned about safety = and reliability, General Aviation aircraft would long ago have exited = the production line with engines sporting safe and reliable (compared to = magnetos) computer-controlled ignition systems, as well as = computer-controlled fuel injection systems. ... 21st century of internal combustion engine technology -- a place = automobile manufacturers not saddled with a "certification process" have = lived for nearly three decades. Which begs the question, do you think = Lycoming waited this long to join the likes of Chevrolet and Honda in = the spirit of safety and reliability? Mark ------=_NextPart_000_003C_01C9132D.ECBF0ED0 Content-Type: text/html; charset="UTF-8" Content-Transfer-Encoding: quoted-printable =EF=BB=BF
Mark,
 
Actually, the computer-controlled = ignition and fuel=20 injection systems WERE originally developed to meet a = "certification=20 process", but not one based on safety or reliability (directly).  = They were=20 developed primarily to meet emissions and mileage certifications.  = Once the=20 auto makers got the basics down (like keeping the engines running at = 14.7:1 air=20 to fuel ratio in cruise to ensure maximum burn and operation of the = catalytic=20 converter), and CPU speeds increased and better sensors were developed, = the=20 engine control system developers realized they could give their engines=20 different "personalities" at each end of the performance spectrum, hence = innovations like staged injectors and other cool = stuff.
 
The "reliability" factor has only been = directly=20 addressed for about the last 10 years, with these same controllers (or, = more=20 accurately, their 32-bit decendents) performing on-board diagnostic=20 functions.
 
Gary Fitzgerald
LNC2 extra-slow = build=20 ~70%
engine: TBD
St. Charles, MO
 
----- Original Message -----
From:=20 marknlisa@hometel.com
Sent: Tuesday, September 09, = 2008 6:40=20 PM
Subject: [LML] Re: Part 23 vs = Guaranteed=20 Safety

 
I believe if those managing the FAA were truly = concerned=20 about safety and reliability, General Aviation aircraft would long=20 ago have exited the production line with engines sporting = safe and=20 reliable (compared to magnetos) computer-controlled ignition systems, = as well=20 as computer-controlled fuel injection systems. ...
 
21st century of internal combustion engine = technology -- a=20 place automobile manufacturers not saddled with a "certification = process" have=20 lived for nearly three decades. Which begs the question, do you think Lycoming waited this long to join = the likes=20 of Chevrolet and Honda in the spirit of safety and = reliability?
 
Mark 
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