X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Sender: To: lml@lancaironline.net Date: Wed, 20 Feb 2008 15:20:13 -0500 Message-ID: X-Original-Return-Path: Received: from smtp123.sbc.mail.sp1.yahoo.com ([69.147.64.96] verified) by logan.com (CommuniGate Pro SMTP 5.2.0) with SMTP id 2739975 for lml@lancaironline.net; Wed, 20 Feb 2008 14:12:23 -0500 Received: (qmail 90518 invoked from network); 20 Feb 2008 19:12:22 -0000 DomainKey-Signature: a=rsa-sha1; q=dns; c=nofws; s=s1024; d=sbcglobal.net; h=Received:X-YMail-OSG:X-Yahoo-Newman-Property:Message-ID:From:To:Subject:Date:MIME-Version:Content-Type:X-Priority:X-MSMail-Priority:X-Mailer:X-MimeOLE; b=chAmp+ZbM1CEWzQur5ZU1sKT9m5H+SUr8glBMX0t1eblUKaoB8c1ZGOz4qvJYDvynro6+6pcdBQeV3QcKsuP4vzh00qoFUM+GPuhFy58b+7c8Zh5avjZspqFC/Gol5f831eLgtUUlnwY7NbeJZ4AYYARskTUEJjbvcpraOhGEco= ; Received: from unknown (HELO Computerroom) (elippse@sbcglobal.net@75.15.143.73 with login) by smtp123.sbc.mail.sp1.yahoo.com with SMTP; 20 Feb 2008 19:12:22 -0000 X-YMail-OSG: OBFj3rQVM1nQbi0BlOzH4P_F4TSq3bhE9BFFQnEoo1JAZ60zrvN.aWVfa_W1b_tLgYt.y5DmVw-- X-Yahoo-Newman-Property: ymail-3 X-Original-Message-ID: <000901c873f4$85366c50$498f0f4b@Computerroom> From: "Paul Lipps" X-Original-To: "Marv Kaye" Subject: Exhaust thrust X-Original-Date: Wed, 20 Feb 2008 11:12:20 -0800 MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_0006_01C873B1.75B4D4D0" X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 6.00.2900.3138 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.3198 This is a multi-part message in MIME format. ------=_NextPart_000_0006_01C873B1.75B4D4D0 Content-Type: text/plain; charset="Windows-1252" Content-Transfer-Encoding: quoted-printable Kent Paser in his book "Speed With Economy" outlines the various mods he = did to substantially increase the speed of his Mustang, including = exhaust nozzles from which he saw some thrust. Unfortunately, he makes = the same mistake so many make when quoting their performance changes; he = only tells how many mph increase he saw. This is only meaningful if you = give the before and after speeds. Speed changes are not additive! = Percentage increases multiply together to give you the increase that = mods, on a certain airframe, can give. So if you get 2%, 1.02 from one = mod and 3%, 1.03 from another and 5% from a third, 1.05, then someone = with an identical plane should be able to see 1.02 X 1.03 X 1.05 =3D = 10.3%, 1.103, more speed when performing the same mods! ------=_NextPart_000_0006_01C873B1.75B4D4D0 Content-Type: text/html; charset="Windows-1252" Content-Transfer-Encoding: quoted-printable
Kent Paser in his book "Speed With Economy" = outlines the=20 various mods he did to substantially increase the speed of his Mustang,=20 including exhaust nozzles from which he saw some thrust. Unfortunately, = he makes=20 the same mistake so many make when quoting their performance = changes; he=20 only tells how many mph increase he saw. This is only meaningful if you = give the=20 before and after speeds. Speed changes are not additive!=20 Percentage increases multiply together to give you the increase = that mods,=20 on a certain airframe, can give. So if you get 2%, 1.02 from one mod and = 3%,=20 1.03 from another and 5% from a third, 1.05,  then someone with an=20 identical plane should be able to see 1.02 X 1.03 X 1.05 =3D = 10.3%, 1.103,=20 more speed when performing the same mods!
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