X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Sender: To: lml@lancaironline.net Date: Thu, 17 Mar 2011 16:36:21 -0400 Message-ID: X-Original-Return-Path: Received: from QMTA11.westchester.pa.mail.comcast.net ([76.96.59.211] verified) by logan.com (CommuniGate Pro SMTP 5.4c2) with ESMTP id 4909902 for lml@lancaironline.net; Thu, 17 Mar 2011 12:16:16 -0400 Received-SPF: pass receiver=logan.com; client-ip=76.96.59.211; envelope-from=j.hafen@comcast.net Received: from omta20.westchester.pa.mail.comcast.net ([76.96.62.71]) by QMTA11.westchester.pa.mail.comcast.net with comcast id LG5t1g0081YDfWL5BGFhmr; Thu, 17 Mar 2011 16:15:41 +0000 Received: from [10.0.1.5] ([24.17.111.171]) by omta20.westchester.pa.mail.comcast.net with comcast id LGFV1g01X3hvfg83gGFYSN; Thu, 17 Mar 2011 16:15:33 +0000 From: John Hafen Mime-Version: 1.0 (Apple Message framework v1082) Content-Type: multipart/alternative; boundary=Apple-Mail-46--51219342 Subject: Re: [LML] Re: Chelton updates X-Original-Date: Thu, 17 Mar 2011 09:15:27 -0700 In-Reply-To: X-Original-To: "Lancair Mailing List" References: X-Original-Message-Id: <526F2269-7EA1-40EE-B8FC-D711E3CF449C@comcast.net> X-Mailer: Apple Mail (2.1082) --Apple-Mail-46--51219342 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset=us-ascii I'm sure it's as obvious to everyone else as it was not obvious to me, = you have to update each Chelton screen independently. I download the = data onto two Smart Media cards and put one in each of my Cheltons and = update them simultaneously. John Hafen Getting a few clues about how to do stuff after 300 hours of flying IVP = 413AJ, thanks to the generosity of everyone on this list. Thank you! On Mar 17, 2011, at 9:05 AM, Dennis Johnson wrote: Hi Duane, =20 I'm sure you know this, but just in case, I should clarify that the = Chelton systems have three separate databases: =20 1. Navigation data, such as airport info and instrument approaches. =20 2. Obstacle data, such as towers and antennas. =20 3. Terrain data, such as mountains and valleys. It does not include = obstacles like towers or buildings. =20 Most Chelton users I know regularly update the navigation and obstacle = databases only, which come out every 28 days. Since basic terrain = doesn't change much, unless you're flying very close to Mt. St. Helens, = even an old terrain database is probably adequate, since the earth = doesn't move that much in a decade or two. Since the terrain database = is too large to fit on a memory card, I'm still flying with the original = one that came with my Cheltons over five years ago. =20 Dennis Legacy, approaching 400 hours tach time=20 =20 --Apple-Mail-46--51219342 Content-Transfer-Encoding: quoted-printable Content-Type: text/html; charset=us-ascii I'm sure it's as obvious to everyone else as it was = not obvious to me, you have to update each Chelton screen independently. =  I download the data onto two Smart Media cards and put one in each = of my Cheltons and update them simultaneously.

John = Hafen
Getting a few clues about how to do stuff after 300 = hours of flying IVP 413AJ, thanks to the generosity of everyone on this = list.  Thank you!


On Mar 17, = 2011, at 9:05 AM, Dennis Johnson wrote:

Hi Duane,
 
I'm sure = you know this, but just in case, I should clarify that the Chelton = systems have three separate = databases:
 
1.  Navigation data, such as = airport info and instrument = approaches.
 
2.  Obstacle data, such as = towers and antennas.
 
3.  Terrain data, = such as mountains and valleys.  It does not include obstacles like = towers or buildings.
 
Most Chelton users I = know regularly update the navigation and obstacle databases only, which = come out every 28 days.  Since basic terrain doesn't change much, = unless you're flying very close to Mt. St. Helens, even an old terrain = database is probably adequate, since the earth doesn't move that much in = a decade or two.  Since the terrain database is too large to = fit on a memory card, I'm still flying with the original one that came = with my Cheltons over five years = ago.
 
Dennis
Legacy, approaching 400 = hours tach time