Return-Path: Received: from smtp01.wlv.untd.com ([209.247.163.57] verified) by logan.com (CommuniGate Pro SMTP 4.1b8) with SMTP id 2435772 for flyrotary@lancaironline.net; Thu, 19 Jun 2003 11:53:54 -0400 Received: (qmail 18822 invoked from network); 19 Jun 2003 15:53:36 -0000 Received: from dialup-67.31.211.79.dial1.tampa1.level3.net (HELO netzero.net) (67.31.211.79) by smtp01.wlv.untd.com with SMTP; 19 Jun 2003 15:53:36 -0000 Message-ID: <3EF1DC6C.5080104@netzero.net> Date: Thu, 19 Jun 2003 11:53:16 -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="------------010009090307060601050709" --------------010009090307060601050709 Content-Type: text/plain; charset=us-ascii; format=flowed Content-Transfer-Encoding: 7bit That's what you get for making us envious :) Finn Bill Eslick wrote: > Finn, > > You guys really know how to take the wind out of my sails :-) > > I am only reporting what I saw on ONE run (Its all I could stand, > noise-wise). At any rate, I know it let the engine wind up more, and > my indicated increased by over 20 mph. (17.3795 knots for you knot guys) > > Another note. I was definitely temperature limited at that OAT. The > only way to get the speed is with the cowl flap closed, and after a > couple of minutes at that speed, the temp limits were hit on my engine > monitor. Opening the cowl flap increases drag and costs me 10-15 > mph. I also have a self-imposed max speed of 170 with the cowl flap > open, after an incident early on in the testing where it tore itself > off the hinges in a run at Vne. Supporting structure has since been > beefed up, but still I stick to the limit. > > Bill > > -------Original Message------- > > > 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 > >> > > > > > ____________________________________________________ > IncrediMail - > Email has finally evolved - Click Here > --------------010009090307060601050709 Content-Type: multipart/related; boundary="------------090606040105050308070905" --------------090606040105050308070905 Content-Type: text/html; charset=us-ascii Content-Transfer-Encoding: 7bit That's what you get for making us envious :)

Finn

Bill Eslick wrote:

Finn,

You guys really know how to take the wind out of my sails :-)

I am only reporting what I saw on ONE run (Its all I could stand, noise-wise). At any rate, I know it let the engine wind up more, and my indicated increased by over 20 mph. (17.3795 knots for you knot guys)

Another note. I was definitely temperature limited at that OAT. The only way to get the speed is with the cowl flap closed, and after a couple of minutes at that speed, the temp limits were hit on my engine monitor. Opening the cowl flap increases drag and costs me 10-15 mph. I also have a self-imposed max speed of 170 with the cowl flap open, after an incident early on in the testing where it tore itself off the hinges in a run at Vne. Supporting structure has since been beefed up, but still I stick to the limit.

Bill

-------Original Message-------

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

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IncrediMail - Email has finally evolved - Click Here

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