Return-Path: Received: from mail.viclink.com ([66.129.220.6] verified) by logan.com (CommuniGate Pro SMTP 4.2.5) with ESMTP id 565363 for flyrotary@lancaironline.net; Mon, 13 Dec 2004 09:32:41 -0500 Received-SPF: none receiver=logan.com; client-ip=66.129.220.6; envelope-from=pjmick@viclink.com Received: from viclink.com (p017.AS1.viclink.com [66.129.192.17]) by mail.viclink.com (8.11.7/8.11.7) with ESMTP id iBDEVd260976 for ; Mon, 13 Dec 2004 06:31:39 -0800 (PST) Message-ID: <41BDA75A.1090206@viclink.com> Date: Mon, 13 Dec 2004 06:29:46 -0800 From: Perry Mick User-Agent: Mozilla/5.0 (Windows; U; Win98; en-US; rv:1.0.1) Gecko/20020823 Netscape/7.0 X-Accept-Language: en-us, en MIME-Version: 1.0 To: Rotary motors in aircraft Subject: Re: [FlyRotary] Re: Glide distances References: Content-Type: multipart/alternative; boundary="------------030208070209060606040102" --------------030208070209060606040102 Content-Type: text/plain; charset=us-ascii; format=flowed Content-Transfer-Encoding: 7bit That's true, if you are flying cross country, and are halfway between two airports, you would want to pick the one that's downwind, not necessarily the closest field. I figure with 1nm per 1000' of altitude, just orbiting the field on a test flight, there is plenty of margin built in since I can supposedly glide about 1.65 nm / 1000' with no wind. Tom wrote: >Perry, >There always something. Gotta remember winds. Being downwind of the airport >at the distance limit would be a problem. > >By the way, when flying skydivers I figured out a very easy way to determine >winds aloft with a GPS. Fly a circle keeping your airspeed constant. Your GPS >groundspeed will be highest when heading downwind and lowest when heading >upwind. Do the simple math on speeds to determine how much. I'm not >suggesting you do this during engine-out, just when you're curious and have a >desire to fly in circles. > >Tom > >--- Perry Mick wrote: > > >>I've never tested engine out glide, but I also plan with 1000 ft/min. >>And if you assume a 10:1 glide ratio, you can glide 10,000 fpm, or 1.65 >>nm or 1.9 sm per 1000 ft. of altitude. When I do test flights, I try to >>stay within 1 nm of the airport for each 1000 ft of AGL. For example, >>5000 ft AGL, stay within a 5 nm radius. Easy with GPS. >> >> >> > > > > >__________________________________ >Do you Yahoo!? >The all-new My Yahoo! - What will yours do? >http://my.yahoo.com > > > >>> Homepage: http://www.flyrotary.com/ >>> Archive: http://lancaironline.net/lists/flyrotary/List.html >>> >>> > > > > --------------030208070209060606040102 Content-Type: text/html; charset=us-ascii Content-Transfer-Encoding: 7bit That's true, if you are flying cross country, and are halfway between two airports, you would want to pick the one that's downwind, not necessarily the closest field.
I figure with 1nm per 1000' of altitude, just orbiting the field on a test flight, there is plenty of margin built in since I can supposedly glide about 1.65 nm / 1000' with no wind.

Tom wrote:

Perry,
There always something.  Gotta remember winds.  Being downwind of the airport
at the distance limit would be a problem.

By the way, when flying skydivers I figured out a very easy way to determine
winds aloft with a GPS.  Fly a circle keeping your airspeed constant.  Your GPS
groundspeed will be highest when heading downwind and lowest when heading
upwind.  Do the simple math on speeds to determine how much.  I'm not
suggesting you do this during engine-out, just when you're curious and have a
desire to fly in circles. 

Tom

--- Perry Mick <pjmick@viclink.com> wrote:

I've never tested engine out glide, but I also plan with 1000 ft/min. 
And if you assume a 10:1 glide ratio, you can glide 10,000 fpm, or 1.65 
nm or 1.9 sm per 1000 ft. of altitude. When I do test flights, I try to 
stay within 1 nm of the airport for each 1000 ft of AGL. For example, 
5000 ft AGL, stay within a 5 nm radius. Easy with GPS.




		
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