X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Sender: To: lml@lancaironline.net Date: Sun, 14 Sep 2008 22:56:03 -0400 Message-ID: X-Original-Return-Path: Received: from smtp124.sbc.mail.re3.yahoo.com ([66.196.96.97] verified) by logan.com (CommuniGate Pro SMTP 5.2.8) with SMTP id 3131968 for lml@lancaironline.net; Sun, 14 Sep 2008 19:56:27 -0400 Received: (qmail 45798 invoked from network); 14 Sep 2008 23:56:28 -0000 Received: from unknown (HELO ?192.168.1.64?) (lorn@ameritech.net@69.209.142.83 with plain) by smtp124.sbc.mail.re3.yahoo.com with SMTP; 14 Sep 2008 23:56:27 -0000 X-Yahoo-Newman-Property: ymail-3 X-Original-Message-Id: <186C51F4-78BD-48A9-8485-DA14050887E6@dynacomm.us> From: Lorn H Olsen X-Original-To: Lancair List Content-Type: multipart/alternative; boundary=Apple-Mail-2-463734237 Mime-Version: 1.0 (Apple Message framework v929.2) Subject: Motion of the North Pole X-Original-Date: Sun, 14 Sep 2008 19:56:26 -0400 X-Mailer: Apple Mail (2.929.2) --Apple-Mail-2-463734237 Content-Type: text/plain; charset=ISO-8859-1; format=flowed; delsp=yes Content-Transfer-Encoding: quoted-printable As per Wikipedia, the North Pole (NP) has moved about 231 miles in the =20= last 4 years. i.e. 82.7 - 81.3 =3D 1.4 and 114.4 - 110.8 =3D 3.6. Now = 1.4=B0 =20 * 60 =3D 84 nm and 3.6=B0 =3D 216 nm. The sqrt( 84 * 84 + 216 * 216 ) =3D = 231 =20 nm. Since I started flying in 1972 (36 years ago), that would mean that =20 the NP has moved 36/4*231 =3D 2,080 miles. When I started flying Phliy =20= had a 6=B0 offset from true to magnetic north and Detroit had a 0=B0 =20 offset. Today Phily is 12=B0 and Detroit is 6=B0. Now if we take a look at the circumference of the Earth at the NP, we =20= get, again according to Wikipedia, sin( 90=B0 - 82.7=B0 ) =3D .127. .127 = * =20 21,600 nm =3D 2,743 nm. In other words the NP has done more than 2/3 of =20= a complete circle at its' latitude. In other words, Detroit should be =20= back to a 0=B0 offset in about another 10 years. If there are any questions or problems, feel free to call or eMail. -- Lorn H. 'Feathers' Olsen, MAA, ASMEL, ASES, Comm, Inst DynaComm, Corp., 248-345-0500, mailto:lorn@dynacomm.us LNC2, FB90/92, O-320-D1F, 1,470 hrs, N31161, Y47, SE Michigan --Apple-Mail-2-463734237 Content-Type: text/html; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable

As per Wikipedia, = the North Pole (NP) has moved about 231 miles in the last 4 years. i.e. = 82.7 - 81.3 =3D 1.4 and 114.4 - 110.8 =3D 3.6. Now 1.4=B0 * 60 =3D 84 nm = and 3.6=B0 =3D 216 nm. The sqrt( 84 * 84 + 216 * 216 ) =3D 231 = nm.

Since I started flying in 1972 (36 years ago), that would = mean that the NP has moved 36/4*231 =3D 2,080 miles. When I started = flying Phliy had a 6=B0 offset from true to magnetic north and Detroit = had a 0=B0 offset. Today Phily is 12=B0 and Detroit is = 6=B0.

Now if we take a look at the = circumference of the Earth at the NP, we get, again according to = Wikipedia, sin( 90=B0 - 82.7=B0 ) =3D .127. .127 * 21,600 nm =3D 2,743 = nm. In other words the NP has done more than 2/3 of a complete circle at = its' latitude. In other words, Detroit should be back to a 0=B0 offset = in about another 10 years.

If there are any = questions or problems, feel free to call or = eMail.

Lorn H. = 'Feathers' Olsen, MAA, ASMEL, ASES, Comm, Inst

DynaComm, = Corp., 248-345-0500, mailto:lorn@dynacomm.us

LNC2, FB90/92, O-320-D1F, 1,470 = hrs, N31161, Y47, SE Michigan

= --Apple-Mail-2-463734237--