X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from mail.stonebender.com ([72.29.103.126] verified) by logan.com (CommuniGate Pro SMTP 5.1c.2) with ESMTP id 1311834 for flyrotary@lancaironline.net; Mon, 07 Aug 2006 10:28:02 -0400 Received-SPF: neutral receiver=logan.com; client-ip=72.29.103.126; envelope-from=atlasyts@bellsouth.net Received: from [192.168.0.100] by mail.stonebender.com (MDaemon PRO v9.0.5) with ESMTP id md50011389922.msg for ; Mon, 07 Aug 2006 09:26:08 -0500 Mime-Version: 1.0 (Apple Message framework v752.2) In-Reply-To: References: Content-Type: text/plain; charset=US-ASCII; delsp=yes; format=flowed Message-Id: <0EBA222E-7524-4319-9C41-92858D8502B2@bellsouth.net> Content-Transfer-Encoding: 7bit From: atlasyts@bellsouth.net Subject: Re: [FlyRotary] Re: PROPELLERS AND COOLING THE ROTARY Date: Mon, 7 Aug 2006 10:25:10 -0400 To: "Rotary motors in aircraft" X-Mailer: Apple Mail (2.752.2) X-Authenticated-Sender: ba@fraserzyachts.com X-Spam-Processed: mail.stonebender.com, Mon, 07 Aug 2006 09:26:08 -0500 (not processed: message from trusted or authenticated source) X-MDRemoteIP: 67.191.46.28 X-Return-Path: atlasyts@bellsouth.net X-Envelope-From: atlasyts@bellsouth.net X-MDaemon-Deliver-To: flyrotary@lancaironline.net X-MDAV-Processed: mail.stonebender.com, Mon, 07 Aug 2006 09:26:10 -0500 I'm using Mac with Firefox browser. get it for free at: http:// www.mozilla.com Buly On Aug 7, 2006, at 10:12 AM, Yvon Cournoyer wrote: > Thanks Buly, I will study this reference some more, but the > Hoverhawk calculator does not work on my Windows XP PC. Which > browser are you using?. Yvon. > > ----- Original Message ----- From: "Bulent Aliev" > > To: "Rotary motors in aircraft" > Sent: Monday, August 07, 2006 6:36 AM > Subject: [FlyRotary] Re: PROPELLERS AND COOLING THE ROTARY > > >> Hi Yvon, >> Looks like you are over propped. here is a quote from a prop speed >> web page:http://www.hoverhawk.com/propspd.html >> " To produce maximum thrust from your propeller at full power >> your tip speed should fall between .88 and .92 mach. To move >> between .88 and .92 mach usually takes a change of about 110 to >> 120 RPM depending upon the diameter of your prop. This of course >> varies depending on your particular propeller and the >> temperature. Try different temperatures then you will see just >> how much the speed of sound can vary. You would ultimately want >> your propeller to reach its redline (. 88 to .92 mach) at the same >> time your engine reaches its maximum rpm limit, its redline. " >> You should be turning the engine 6500-7000 rpm on takeoff (not >> static) for best thrust. >> >> >> Bulent "Buly" Aliev >> FXE Ft lauderdale, FL >> http://tinyurl.com/s5xw8 >> >> >> >> >> >> >> On Aug 6, 2006, at 4:56 PM, Yvon Cournoyer wrote: >> >>> I have replaced my old wood 2 blades 74'' propeller with a new 3 >>> blades 72'' Warp Drive, ground adjustable. >>> I have set the pitch to obtain about 4800 engine static rpm, >>> which is what I began flying with my old wood prop, some years ago. >>> No other changes, yet in spite of abnormally hot and humid >>> weather, I find that both oil and coolant cool better and will >>> allow longer full power static runups. >>> I have not flown the new prop yet, but I am eager to verify its >>> performance at altitude. >>> Yvon. >>> >>> >>> -- >>> Homepage: http://www.flyrotary.com/ >>> Archive and UnSub: http://mail.lancaironline.net/lists/flyrotary/ >> >> >> -- >> Homepage: http://www.flyrotary.com/ >> Archive and UnSub: http://mail.lancaironline.net/lists/flyrotary/ > > > > -- > Homepage: http://www.flyrotary.com/ > Archive and UnSub: http://mail.lancaironline.net/lists/flyrotary/ Buly http://tinyurl.com/dcy36