Return-Path: Sender: (Marvin Kaye) To: flyrotary Date: Thu, 22 May 2003 09:54:28 -0400 Message-ID: X-Original-Return-Path: Received: from [65.54.169.188] (HELO hotmail.com) by logan.com (CommuniGate Pro SMTP 4.1b6) with ESMTP id 2358556 for flyrotary@lancaironline.net; Thu, 22 May 2003 00:17:09 -0400 Received: from mail pickup service by hotmail.com with Microsoft SMTPSVC; Wed, 21 May 2003 21:17:08 -0700 Received: from 67.243.12.96 by bay3-dav158.bay3.hotmail.com with DAV; Thu, 22 May 2003 04:17:08 +0000 X-Originating-IP: [67.243.12.96] X-Originating-Email: [lors01@msn.com] Reply-To: "Tracy Crook" From: "Tracy Crook" X-Original-To: "Rotary motors in aircraft" References: Subject: Re: [FlyRotary] Re: Tuned induction X-Original-Date: Thu, 22 May 2003 00:17:51 -0400 Organization: Real World Solutions Inc. MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_0202_01C31FF7.9564CBE0" X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 6.00.2800.1158 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1165 X-Original-Message-ID: X-OriginalArrivalTime: 22 May 2003 04:17:08.0352 (UTC) FILETIME=[026DB000:01C32019] This is a multi-part message in MIME format. ------=_NextPart_000_0202_01C31FF7.9564CBE0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable So, I don t know. We need some data. Tracy is guessing that his = engine puts out 180hp. Could be; but I m guessing we don t know what it = is, and it could just as likely be 165. Al Al, meant to ask you earlier if you had any fuel flow data during the = dyno pulls. Assuming we know approx. BSFC, we can make a guess on HP = based on fuel flow. Sure hope I'm making more than 165 because if = that's all it is, my BSFC works out to .73, which would be incredibly = lousy. At best power mixture and WOT the rotary is said to be around = .65 which works out to 185 HP at 20 GPH. I ran well below best power = mixture in the Sun 100 race (16.5 GPH) and stayed ahead of half the 180 = HP RVs. They all looked pretty clean aerodynamically compared to my = ship. Here's another possible indicator. When I was running an untuned = carburetor manifold, maximum fuel burn was 16 GPH at best power mixture. = With my tuned EFI manifold that number went up to 20. Not as good as a = dyno number but definitely indicates that the engine is pumping more air = through it. Tracy ------=_NextPart_000_0202_01C31FF7.9564CBE0 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable

So, I don t know. We need some data. Tracy is = guessing that=20 his engine puts out 180hp. Could be; but I m guessing we don t know = what it=20 is, and it could just as likely be 165.

Al

Al,

meant to ask you earlier if you = had any=20 fuel flow data during the dyno pulls. Assuming we know approx. = BSFC, we=20 can make a guess on HP based on fuel flow. Sure hope I'm making = more=20 than 165 because if that's all it is, my BSFC works out to = .73,=20 which would be incredibly lousy. At best power mixture and WOT = the=20 rotary is said to be around .65 which works out to 185 HP at 20=20 GPH. I ran well below best power mixture in the Sun = 100 race=20 (16.5 GPH) and stayed ahead of half the 180 HP RVs. They all = looked=20 pretty clean aerodynamically compared to my ship.

Here's another possible = indicator. When I=20 was running an untuned carburetor manifold, maximum fuel burn was 16 = GPH at=20 best power mixture. With my tuned EFI manifold that number went = up to=20 20. Not as good as a dyno number but definitely indicates that = the=20 engine is pumping more air through it.

Tracy

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