Return-Path: Sender: (Marvin Kaye) To: lml Date: Mon, 24 Mar 2003 08:23:30 -0500 Message-ID: X-Original-Return-Path: Received: from smtp01.mrf.mail.rcn.net ([207.172.4.60] verified) by logan.com (CommuniGate Pro SMTP 4.1b1) with ESMTP id 2084649 for lml@lancaironline.net; Mon, 24 Mar 2003 08:22:05 -0500 Received: from 208-59-158-209.s209.tnt2.frdb.va.dialup.rcn.com ([208.59.158.209] helo=OFFICE) by smtp01.mrf.mail.rcn.net with smtp (Exim 3.35 #4) id 18xRtr-0003TL-00; Mon, 24 Mar 2003 08:22:04 -0500 X-Original-Message-ID: <05c601c2f208$7dd3fc20$57eca4d8@OFFICE> From: "Bill & Sue" X-Original-To: "Lancair Mailing List" X-Original-Cc: "Scott Krueger" References: Subject: Re: [LML] Tip Speed Query X-Original-Date: Mon, 24 Mar 2003 08:22:59 -0500 MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_05C3_01C2F1DE.94714480" X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 6.00.2720.3000 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2600.0000 This is a multi-part message in MIME format. ------=_NextPart_000_05C3_01C2F1DE.94714480 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable 51250 x 60 =3D 3,075,000 feet per hour or 582 mph. Aren't we getting close to Mach 1? Scott, Yes, you're getting close. Mach 1 is around 600 knots (690 mph) = depending on temperature. Your calculation of 582 mph would put you = around M.84. The warmer it is, the faster mach 1 so for the same TAS of = the blade tip, a cooler day would give you a slightly higher mach = number, a warmer day a slightly lower mach number. Bill harrelson@erols.com N5ZQ LNC2 O-320 VA42 Fredericksburg, VA ------=_NextPart_000_05C3_01C2F1DE.94714480 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable
 

51250 x 60 =3D 3,075,000 feet per hour or 582 = mph.

Aren't we=20 getting close to Mach 1?
 
 
Scott,
 
Yes, you're getting close. Mach 1 is around 600 knots (690 mph) = depending=20 on temperature. Your calculation of 582 mph would put you around M.84. = The=20 warmer it is, the faster mach 1 so for the same TAS of the blade tip, = a cooler=20 day would give you a slightly higher mach number, a warmer day a = slightly=20 lower mach number.
 
Bill
N5ZQ  LNC2  O-320  VA42  Fredericksburg,=20 VA
 ------=_NextPart_000_05C3_01C2F1DE.94714480--