X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Sender: To: lml@lancaironline.net Date: Thu, 05 Jun 2008 21:35:42 -0400 Message-ID: X-Original-Return-Path: Received: from wind.imbris.com ([216.18.130.7] verified) by logan.com (CommuniGate Pro SMTP 5.2.3) with ESMTPS id 2954807 for lml@lancaironline.net; Thu, 05 Jun 2008 11:36:17 -0400 Received-SPF: none receiver=logan.com; client-ip=216.18.130.7; envelope-from=brent@regandesigns.com Received: from [192.168.1.144] (cbl-238-80.conceptcable.com [207.170.238.80] (may be forged)) (authenticated bits=0) by wind.imbris.com (8.14.2/8.12.11.S) with ESMTP id m55FZaqT073911 for ; Thu, 5 Jun 2008 08:35:36 -0700 (PDT) (envelope-from brent@regandesigns.com) X-Original-Message-ID: <484807C1.2040905@regandesigns.com> X-Original-Date: Thu, 05 Jun 2008 08:35:29 -0700 From: Brent Regan User-Agent: Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.7.2) Gecko/20040804 Netscape/7.2 (ax) X-Accept-Language: en-us, en MIME-Version: 1.0 X-Original-To: Lancair Mailing List Subject: Re: Selecting an EFIS Content-Type: multipart/alternative; boundary="------------040603080308050906010403" This is a multi-part message in MIME format. --------------040603080308050906010403 Content-Type: text/plain; charset=us-ascii; format=flowed Content-Transfer-Encoding: 7bit Chuck writes: <<>> Exactly my point, Chuck. When would you fly in circles for a long time? In a holding pattern, of course. A holding pattern is a standard rate turn for half the time which averages to a half standard rate turn continuously. The two minute frequency is well within the integration period of the gravity aiding. When would you fly a holding pattern? In actual IMC. Accelerating climbing turns during departure are also deadly to most low end AHRS. If you plan to fly actual IMC, the Chelton ADAHRS is a good choice. If you are a VFR only pilot who only flies in the clear and are looking to have glass bragging rights then buy whatever EFIS system you can afford and looks pretty in the hanger. If you plan to survive flying actual IMC then you need to leave the toys on the ramp and get some serious tested and qualified hardware. Regards Brent Regan --------------040603080308050906010403 Content-Type: text/html; charset=us-ascii Content-Transfer-Encoding: 7bit Chuck writes:

<<<If I ever decide to fly in circles for a long time, I will be sure to buy a Chelton.>>>

Exactly my point, Chuck. When would you fly in circles for a long time? In a holding pattern, of course. A holding pattern is a standard rate turn for half the time which averages to a half standard rate turn continuously. The two minute frequency is well within the integration period of the gravity aiding.

When would you fly a holding pattern? In actual IMC. Accelerating climbing turns during departure are also deadly to most low end AHRS.

If you plan to fly actual IMC, the Chelton ADAHRS is a good choice.

If you are a VFR only pilot who only flies in the clear and are looking to have glass bragging rights then buy whatever EFIS system you can afford and looks pretty in the hanger. If you plan to survive flying actual IMC then you need to leave the toys on the ramp and get some serious tested and qualified hardware.

Regards
Brent Regan
--------------040603080308050906010403--