X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from [206.46.252.48] (HELO vms048pub.verizon.net) by logan.com (CommuniGate Pro SMTP 4.3c5) with ESMTP id 913771 for flyrotary@lancaironline.net; Mon, 25 Apr 2005 09:57:43 -0400 Received: from verizon.net ([71.99.145.121]) by vms048.mailsrvcs.net (Sun Java System Messaging Server 6.2 HotFix 0.04 (built Dec 24 2004)) with ESMTPA id <0IFI003CR9G5FWR8@vms048.mailsrvcs.net> for flyrotary@lancaironline.net; Mon, 25 Apr 2005 08:57:41 -0500 (CDT) Date: Mon, 25 Apr 2005 09:57:37 -0400 From: Finn Lassen Subject: Re: [FlyRotary] Re: Apex Slot Wear/ Grinding for 3mm Seals In-reply-to: To: Rotary motors in aircraft Message-id: <426CF751.4070204@verizon.net> MIME-version: 1.0 Content-type: multipart/alternative; boundary=------------000608000404030102010107 X-Accept-Language: en-us, en References: User-Agent: Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.4) Gecko/20030624 Netscape/7.1 (ax; PROMO) This is a multi-part message in MIME format. --------------000608000404030102010107 Content-Type: text/plain; charset=us-ascii; format=flowed Content-Transfer-Encoding: 7bit Thanks Lynn! One final question (I hope). How may hours per season? I guess you have no answer to this question: How many hours per rotor before it's worn to the limit? You mentioned that you've seen 5 to 6 worn rotors in 30 years, but I suppose that's not necessarily rotors from engines you raced. Finn Lehanover@aol.com wrote: >In a message dated 04/24/2005 02:53 Central Daylight Time, >finn.lassen@verizon.net writes: > ><< Ok, so grooves don't wear in your application (car racing) with proper > lubrication and air filtering. > > What HP range would you estimate your engines spend 90% of their time in? > > Finn > >> > > >We record and review each session on a video camera that watches a special >set of gages. I show the driver where he has dropped off of the power and he >complains about having to shift up here or down there and so on. We may then >change rear end ratios to get him out of a shift in a fast turn or such. > >He is attempting to stay above 8,000 RPM. Max power is at 9,400 RPM and >shifts are at 9,600 RPM. > >HP at 8,000 is 223 to 225. Max power is 244 to 245 HP at 9,400 RPM. > >Lynn E. Hanover > > > >>> Homepage: http://www.flyrotary.com/ >>> Archive: http://lancaironline.net/lists/flyrotary/List.html >>> >>> > > > --------------000608000404030102010107 Content-Type: text/html; charset=us-ascii Content-Transfer-Encoding: 7bit Thanks Lynn!

One final question (I hope). How may hours per season?

I guess you have no answer to this question:
How many hours per rotor before it's worn to the limit?
You mentioned that you've seen 5 to 6 worn rotors in 30 years, but I suppose that's not necessarily rotors from engines you raced.

Finn

Lehanover@aol.com wrote:
In a message dated 04/24/2005 02:53 Central Daylight Time, 
finn.lassen@verizon.net writes:

<< Ok, so grooves don't wear in your application (car racing) with proper 
 lubrication and air filtering.
 
 What HP range would you estimate your engines spend 90% of their time in?
 
 Finn
  >>


We record and review each session on a video camera that watches a special 
set of gages. I show the driver where he has dropped off of the power and he 
complains about having to shift up here or down there and so on. We may then 
change rear end ratios to get him out of a shift in a fast turn or such. 

He is attempting to stay above 8,000 RPM. Max power is at 9,400 RPM and 
shifts are at 9,600 RPM. 

HP at 8,000 is 223 to 225. Max power is 244 to 245 HP at 9,400 RPM.

Lynn E. Hanover

  
 Homepage:  http://www.flyrotary.com/
 Archive:   http://lancaironline.net/lists/flyrotary/List.html
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