Return-Path: Received: from smtp01.wlv.untd.com ([209.247.163.57] verified) by logan.com (CommuniGate Pro SMTP 4.1b8) with SMTP id 2435582 for flyrotary@lancaironline.net; Thu, 19 Jun 2003 09:19:35 -0400 Received: (qmail 2723 invoked from network); 19 Jun 2003 13:19:31 -0000 Received: from dialup-67.31.211.110.dial1.tampa1.level3.net (HELO netzero.net) (67.31.211.110) by smtp01.wlv.untd.com with SMTP; 19 Jun 2003 13:19:31 -0000 Message-ID: <3EF1B851.5020503@netzero.net> Date: Thu, 19 Jun 2003 09:19:13 -0400 From: Finn Lassen User-Agent: Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.0.1) Gecko/20020823 Netscape/7.0 (nscd2) X-Accept-Language: en-us, en MIME-Version: 1.0 To: Rotary motors in aircraft Subject: Re: [FlyRotary] Re: Straight pipes References: Content-Type: multipart/alternative; boundary="------------030405050308020307090200" --------------030405050308020307090200 Content-Type: text/plain; charset=us-ascii; format=flowed Content-Transfer-Encoding: 7bit Wow, there's some magic at work here! Maybe a 10 mph tailwind :) Seriously, a linear extrapolation would put the speed at 196 mph not 206 mph with an RPM increase from 5350 (180 mph) to 5820. Or put another way, would expect at least 6100 RPM for 206 mph. Finn Bill Eslick wrote: > > > What was the difference in engine rpm at top speed Bill? > > Tracy > > ================================================== > > Here is all the info: > > With muffler, WOT at 3000 msl gives about 5350 rpm, 180 mph true. > (156 knots) > > Without, WOT at 3000 msl gives about 5820 rpm, 206 mph true. (179 knots) > > OAT was 30 C. > > Tracy, the 120 mph climb rpm was 4800 with the muffler, 4880 without it. > > Bill > > > > > ____________________________________________________ > IncrediMail - > Email has finally evolved - Click Here > --------------030405050308020307090200 Content-Type: multipart/related; boundary="------------000001060500000302070007" --------------000001060500000302070007 Content-Type: text/html; charset=us-ascii Content-Transfer-Encoding: 7bit Wow, there's some magic at work here! Maybe a 10 mph tailwind :)
Seriously, a linear extrapolation would put the speed at 196 mph not 206 mph with an RPM increase from 5350 (180 mph) to 5820. Or put another way, would expect at least 6100 RPM for 206 mph.

Finn

Bill Eslick wrote:

What was the difference in engine rpm at top speed Bill?

Tracy

==================================================

Here is all the info:

With muffler, WOT at 3000 msl gives about 5350 rpm, 180 mph true. (156 knots)

Without, WOT at 3000 msl gives about 5820 rpm, 206 mph true. (179 knots)

OAT was 30 C.

Tracy, the 120 mph climb rpm was 4800 with the muffler, 4880 without it.

Bill

____________________________________________________
IncrediMail - Email has finally evolved - Click Here

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