X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Sender: To: lml@lancaironline.net Date: Fri, 31 Aug 2007 13:28:03 -0400 Message-ID: X-Original-Return-Path: Received: from ironport5.liveoakmail.com ([216.110.12.21] verified) by logan.com (CommuniGate Pro SMTP 5.1.12) with ESMTP id 2302638 for lml@lancaironline.net; Fri, 31 Aug 2007 09:29:35 -0400 Received-SPF: none receiver=logan.com; client-ip=216.110.12.21; envelope-from=walter@advancedpilot.com X-IronPort-Anti-Spam-Filtered: true X-IronPort-Anti-Spam-Result: Ao8CAAO010ZAMf4V/2dsb2JhbACCbw X-IronPort-AV: E=Sophos;i="4.19,331,1183352400"; d="scan'208,217";a="26707296" Received: from rs5.liveoakhosting.com (HELO secure5.liveoakhosting.com) ([64.49.254.21]) by ironport5.liveoakmail.com with ESMTP; 31 Aug 2007 08:28:56 -0500 Received: (qmail 24667 invoked from network); 31 Aug 2007 08:28:56 -0500 Received: from ip12-197-248-25.networkusa.com (HELO ?10.0.1.2?) (12.197.248.25) by rs5.liveoakhosting.com with (AES128-SHA encrypted) SMTP; 31 Aug 2007 08:28:56 -0500 Mime-Version: 1.0 (Apple Message framework v752.3) In-Reply-To: References: Content-Type: multipart/alternative; boundary=Apple-Mail-1--193662807 X-Original-Message-Id: From: Walter Atkinson Subject: Re: [LML] FW: Engine efficiency X-Original-Date: Fri, 31 Aug 2007 08:28:54 -0500 X-Original-To: "Lancair Mailing List" X-Mailer: Apple Mail (2.752.3) --Apple-Mail-1--193662807 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset=WINDOWS-1252; delsp=yes; format=flowed Fred: I *think* the number is 15.6, not 16.6. That would certainly make a =20 lot more sense. Walter On Aug 31, 2007, at 6:19 AM, John Barrett wrote: From: Fred Moreno [mailto:fredmoreno@optusnet.com.au] Sent: Thursday, August 30, 2007 6:58 PM To: John Barrett Subject: FW: Engine efficiency Hi John: Please forward the note below to LML as it is rejecting my emails =20 again after a brief run of acceptance. Cheers, Fred ___________________________________________________________________ =93The Continental engine manual doesn't seem relevant with the high =20 compression. On the other hand, I did get data from APS/GAMI on operation LOP. =20 For 10:1 compression the HP =3D 16.6 x FF(gph). That is a significant jump =20 from the 14.9 factor for the stock 8.5:1 compression.=94 I have difficulty believing 16.6 hr hour per gallon. Assuming 5.85 =20 pounds per gallon (a GAMI figure)I calculate that this is equivalent =20 to a specific fuel consumption of 0.352 pounds per horsepower hour =20 which is into diesel territory. I plotted some SFC data published by manufacturers including liquid =20 cooled IOL-200 used on Voyager which had a compression ratio of =20 11.4. It suggested that the correct figure for a compression ratio =20 of 10 is closer to 15 hp hr/gallon. The figure of 14.9 sounds too =20 high for 8.5:1 compression as well. I would expect it to be about 6% =20= lower efficiency based on charts of efficiency vs compression ratio, =20 or about 14.1 HP hr/gallon at 8.5:1. As usual, carefully collected data collected with calibrated =20 instruments should tell the tale. Fred Moreno No virus found in this incoming message. Checked by AVG Free Edition. Version: 7.5.484 / Virus Database: 269.12.12/979 - Release Date: =20 8/29/2007 8:21 PM No virus found in this outgoing message. Checked by AVG Free Edition. Version: 7.5.484 / Virus Database: 269.12.12/979 - Release Date: =20 8/29/2007 8:21 PM --Apple-Mail-1--193662807 Content-Transfer-Encoding: quoted-printable Content-Type: text/html; charset=WINDOWS-1252 Fred:

I *think* the number is = 15.6, not 16.6.=A0 That would certainly make a lot more = sense.

Walter

On Aug 31, = 2007, at 6:19 AM, John Barrett wrote:

=A0

=A0

Fred Moreno [mailto:fredmoreno@optusnet.com.= au]
Sent: Thursday, August 30, 2007 6:58 PM
To: John Barrett
FW: Engine = efficiency

=A0

Hi John:

Please forward the note = below to LML as it is rejecting my emails again after a brief run of = acceptance.

=A0

=A0

=A0=A0

=93The=A0 Continental engine = manual doesn't seem relevant with the high = compression.

=A0 On the other hand, I did get data from APS/GAMI = on operation LOP. For 10:1=A0 compression the HP =3D= 16.6 x FF(gph). That is a significant jump from the

=A0 14.9 factor for the = stock 8.5:1 compression.=94=A0

I have difficulty = believing 16.6 hr hour per gallon.=A0 Assuming 5.85 pounds per gallon (a = GAMI figure)I calculate that this is equivalent to a specific fuel = consumption of 0.352 pounds per horsepower hour which is into diesel = territory.=A0

=A0I plotted some SFC data = published by manufacturers including liquid cooled IOL-200 used on = Voyager which had a compression ratio of 11.4.=A0 It suggested that the = correct figure for a compression ratio of 10 is closer to 15 hp = hr/gallon.=A0=A0=A0 The figure of 14.9 sounds too high for 8.5:1 = compression as well. =A0I would expect it to be about 6% lower = efficiency based on charts of efficiency vs compression ratio, or about = 14.1 HP hr/gallon at 8.5:1.=A0

As usual, carefully = collected data collected with calibrated instruments should tell the = tale.

=A0Fred = Moreno

=A0

No virus found in this incoming = message.
Checked by AVG Free = Edition.
Version: 7.5.484 / Virus = Database: 269.12.12/979 - Release Date: 8/29/2007 8:21 = PM

No virus found = in this outgoing message.
Checked by AVG = Free Edition.
Version: 7.5.484 / Virus Database: = 269.12.12/979 - Release Date: 8/29/2007 8:21 PM

= --Apple-Mail-1--193662807--