X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Sender: To: lml@lancaironline.net Date: Mon, 11 Sep 2006 00:37:48 -0400 Message-ID: X-Original-Return-Path: Received: from smtp107.sbc.mail.mud.yahoo.com ([68.142.198.206] verified) by logan.com (CommuniGate Pro SMTP 5.1c.3) with SMTP id 1372891 for lml@lancaironline.net; Sun, 10 Sep 2006 15:16:11 -0400 Received-SPF: none receiver=logan.com; client-ip=68.142.198.206; envelope-from=elippse@sbcglobal.net Received: (qmail 1915 invoked from network); 10 Sep 2006 19:15:31 -0000 DomainKey-Signature: a=rsa-sha1; q=dns; c=nofws; s=s1024; d=sbcglobal.net; h=Received:Message-ID:From:To:Subject:Date:MIME-Version:Content-Type:X-Priority:X-MSMail-Priority:X-Mailer:X-MimeOLE; b=sO7zctqOwZXYzNraakHbZDasVT0nW6HvHr8alpadalcJmFxgi/CTAyh0CNeUPx1iwaAfVSpva1RdCK7x0nqtJ95u3dUDF3zTLQODdgybotptcLAU8LETdZO2udKBlhy5mnR8G0KcQXAQbdOL1o4tC+MiqML4keNKT3urp3bnpLg= ; Received: from unknown (HELO Computerroom) (elippse@sbcglobal.net@75.15.148.27 with login) by smtp107.sbc.mail.mud.yahoo.com with SMTP; 10 Sep 2006 19:15:31 -0000 X-Original-Message-ID: <002001c6d50d$7d6ec3a0$1b940f4b@Computerroom> From: "Paul Lipps" X-Original-To: "Marv Kaye" Subject: LNC2 O-320 speeds X-Original-Date: Sun, 10 Sep 2006 12:15:33 -0700 MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_001D_01C6D4D2.D06DB830" X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 6.00.2900.2869 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.2962 This is a multi-part message in MIME format. ------=_NextPart_000_001D_01C6D4D2.D06DB830 Content-Type: text/plain; charset="Windows-1252" Content-Transfer-Encoding: quoted-printable Scotty! Here's some GPS-based test data I acquired a few years ago on Oscar = Grassle's 235 with a stock 320, N80G, with a two-blade, fixed-pitch = ELIPPSE prop and one PLASMA I ignition at 10,000' d-alt, leaned for max = power/rpm. 174k/200 mph, 2680 rpm, 89hp/54% 182k/210 mph, 2800 rpm, 100 hp/60% 191k/220 mph, 2920 rpm, 113 hp/68% 200k/230 mph, 3040 rpm, 130hp/78% 202k/233 mph, 3090 rpm, 137 hp/83%=20 The average effective prop pitch, based on TAS mph X 1056 / rpm, was = 79.4" The hp numbers should be pretty close even though I didn't take = into account the increased intake density due to dynamic pressure. Doing = this with the last numbers at 202k, which would have had the greatest = effect, only changed it to 138hp/86%. The hp was also based on a linear = hp vs rpm estimate. 'Course, all of this is predicated on his O-320 = putting out 160 hp at rated map and rpm. I have reasonable doubt about = that; I would put it more at about 150 hp based on some other test data. = The rpm was corrected for known tachometer error. D-alt had stagnation = temperature rise accounted for in the OAT. ------=_NextPart_000_001D_01C6D4D2.D06DB830 Content-Type: text/html; charset="Windows-1252" Content-Transfer-Encoding: quoted-printable

Scotty!

Here's some GPS-based = test data I=20 acquired a few years ago on Oscar Grassle's 235 with a stock 320, = N80G,=20 with a two-blade, fixed-pitch ELIPPSE prop and one PLASMA I ignition at = 10,000'=20 d-alt, leaned for max power/rpm.

174k/200 mph, 2680 rpm, 89hp/54%

182k/210 mph, 2800 rpm, 100 hp/60%

191k/220 mph, 2920 rpm, 113 hp/68%

200k/230 mph, 3040 rpm, 130hp/78%

202k/233 mph, 3090 rpm, 137 = hp/83%

The average = effective prop pitch,=20 based on TAS mph X 1056 / rpm, was 79.4" The hp numbers should be pretty = close=20 even though I didn't take into account the increased intake density due = to=20 dynamic pressure. Doing this with the last numbers at 202k, which would = have had=20 the greatest effect, only changed it to 138hp/86%. The hp was = also based on=20 a linear hp vs rpm estimate. 'Course, all of this is predicated on = his=20 O-320 putting out 160 hp at rated map and rpm. I have reasonable doubt = about=20 that; I would put it more at about 150 hp based on some other test data. = The rpm=20 was corrected for known tachometer error. D-alt had stagnation = temperature rise=20 accounted for in the OAT.

------=_NextPart_000_001D_01C6D4D2.D06DB830--