X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Sender: To: lml@lancaironline.net Date: Mon, 27 Mar 2006 00:39:24 -0500 Message-ID: X-Original-Return-Path: Received: from mxsf42.cluster1.charter.net ([209.225.28.174] verified) by logan.com (CommuniGate Pro SMTP 5.0.8) with ESMTP id 1047226 for lml@lancaironline.net; Sun, 26 Mar 2006 10:15:07 -0500 Received-SPF: pass receiver=logan.com; client-ip=209.225.28.174; envelope-from=troneill@charter.net Received: from mxip16a.cluster1.charter.net (mxip16a.cluster1.charter.net [209.225.28.146]) by mxsf42.cluster1.charter.net (8.12.11/8.12.11) with ESMTP id k2QFEJ3f030588 for ; Sun, 26 Mar 2006 10:14:19 -0500 Received: from 68-184-228-238.dhcp.stls.mo.charter.com (HELO axs) ([68.184.228.238]) by mxip16a.cluster1.charter.net with SMTP; 26 Mar 2006 10:14:19 -0500 X-IronPort-AV: i="4.03,130,1141621200"; d="scan'208,217"; a="133665756:sNHT51456536" X-Original-Message-ID: <001801c650e7$f4753fb0$6401a8c0@axs> From: "terrence o'neill" X-Original-To: "Lancair Mailing List" References: Subject: Re: [LML] Re: Prop Overspeed X-Original-Date: Sun, 26 Mar 2006 09:14:19 -0600 MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_0015_01C650B5.A992F140" X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 6.00.2900.2180 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.2180 This is a multi-part message in MIME format. ------=_NextPart_000_0015_01C650B5.A992F140 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable So? Why not the same? Our engines are antiques ... anything over 50 = years old? I have Lycoming engine blueprints of todays engines, from = 1946. Improving engine reliability is just engineering of structures... = unfortunately controlled by myopic 'bottom -line' non-entrepreneurs. =20 There's a lesson lurking in running your watercooled Corvette at = 1600-rpm, though it has a 6000+ max RPM capability. Aircraft engine = manufacturers could have their designers modify their existing engine = designs to live at 6000+ RPMs for short periodes of time ... I suspect = with very little geometry change ... and thus be bulletproof at 2800... = don't you agree? Instead, i think, they have the cart before the horse, if they complain = that they have to have individual cylinders that are replaceable because = only a few thousand are made each year. The reverse is true. My peers remember 1966, a year when GenAv sold tens of thousands of = planes ... before the FAA became so bloated and nit-pickey, and the = courts were less precedent-enslaved, entertaining frivilous lawsuits and = giving technical decisions to common-sense-challenged juries... fining = Beech millions because a drun k flew into something. Maybe manufacturers now only make a few thousand engines a year because = their engines have fragile cases and flexible individual loose-fitting = pistons in cold-to-hot dimension-changing cylinder assemblies. That's why I mentioned DeltaAir and TAE liquid-cooled diesels. Liquid = cooled engines don't use ANY oil, and are longer-lived because they can = be built to much closer tolerances. Like big diesel engines with very = rigid blocks. And blown diesels don't need all those articulated poppet = valves. Does that sound reasonable? Terrence How does anyone else feel about this? Fine. Let's see, over rev the engine so that the valve springs can't get the = valves out of the way and, uh, something might crunch. We utilize unique engines where individual cylinder assemblies are = replaceable rather than the whole engine of which only a few thousand = are made each year. We run our engines in excess of 75% power hour-after-hour. At 75 MPH = my water cooled Corvette engine idles along at 1600 RPM with a 6000+ max = RPM capability that is only reached occasionally for short periods of = time. Just ain't the same..... Grayhawk ------=_NextPart_000_0015_01C650B5.A992F140 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable
So?  Why not the = same?  Our=20 engines are antiques ... anything over 50 years old?  I have = Lycoming=20 engine blueprints of todays engines, from 1946.
 
Improving engine reliability = is =20 just engineering of structures... unfortunately controlled = by myopic=20 'bottom -line' non-entrepreneurs. 
 
There's a lesson lurking in=20 running your watercooled Corvette at 1600-rpm, though it has a = 6000+=20 max RPM capability. Aircraft engine manufacturers could have their=20 designers modify their existing engine designs to live at 6000+ RPMs for = short=20 periodes of time ... I suspect with very little geometry change ... = and=20 thus be bulletproof at 2800... don't you agree?
 
Instead, i think, they = have the=20 cart before the horse, if they complain that they have to = have individual=20 cylinders that are replaceable because only a few thousand are made each = year.=20 The reverse is true.
My peers remember 1966, a = year when=20 GenAv sold tens of thousands of planes ... before the FAA became so = bloated and=20 nit-pickey, and the courts were less precedent-enslaved, entertaining = frivilous=20 lawsuits and giving technical decisions to common-sense-challenged = juries...=20 fining Beech millions because a drun k flew into something.
Maybe manufacturers now = only make=20 a few thousand engines a year because their engines = have=20 fragile cases and flexible individual loose-fitting pistons in = cold-to-hot=20 dimension-changing cylinder assemblies.
 
That's why I mentioned = DeltaAir=20 and TAE liquid-cooled diesels.  Liquid cooled engines don't use ANY = oil,=20 and are longer-lived because they can be built to much closer = tolerances. =20 Like big diesel engines with very rigid blocks.  And blown diesels = don't=20 need all those articulated poppet valves. Does that sound=20 reasonable?
 
Terrence
How does anyone else feel about this?

 
Fine.
 
Let's see, over rev the engine so that the valve springs can't = get the=20 valves out of the way and, uh, something might crunch.
 
We utilize unique engines where individual cylinder = assemblies are=20 replaceable rather than the whole engine of which only a few thousand = are made=20 each year.
 
We run our engines in excess of 75% power hour-after-hour.  = At 75=20 MPH my water cooled Corvette engine idles along at 1600 RPM = with a=20 6000+ max RPM capability that is only reached occasionally for short = periods=20 of time.
 
Just ain't the same.....
 
Grayhawk
------=_NextPart_000_0015_01C650B5.A992F140--