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radar altimeter

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VE3LVO(at)rac.ca
Guest

Posted: Thu Apr 26, 2007 5:34 pm Post subject: radar altimeter

John

Why are you using a radar altimeter? Is it for landing, because I'm using a 

a common auto backup meter with an extra stage to give a sliding audio tone 

in the earphones for heights from 5 feet down to 5 inches on touchdown. [The 

Europa Classic needs tailwheel on ground first, account loss of rudder 

authority at stall]

Ferg Kyle

Europa A064 914 Classic

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rv9jim(at)Juno.com
Guest

Posted: Thu Apr 26, 2007 6:32 pm Post subject: radar altimeter

Ferg,

        The Europa has plenty of rudder authority at a stall.  My mono

wheel was fine with rudder.  The wing would stall well before the rudder

would stop being a control.  Plus, the steerable tail wheel is the factor

after touch down.  Just be quick on corrections.  i really enjoyed my

bird.



Jim Nelson

A058

Sold it two years ago for a bigger bird.

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john_rv10(at)yahoo.com
Guest

Posted: Thu Apr 26, 2007 11:31 pm Post subject: radar altimeter

Ferg,



What a great idea. I'd be interested to see more detail on that.



The reason for the Rad Alt is because we live in an area that is on a thin

strip of land between the mountains and the sea. Cloud often sits on the

mountain and we have a hilly approach to the field from both ends. We have

available an NDB approach which often doesn't penetrate the cloud base on a

wet winter's day, and the current GPS approach is only marginally better.

Our daughter also lives on a high plateau some 3 hours flight time away and

they are also prone to low cloud. 



CASA (Aussie FAA equiv) is working on a ground based system to enable low

level GPS IFR approaches. They have recently given some aircraft a low level

IFR approach with the appropriate GPS and a Rad Alt, hence the interest in

the Rad Alt. 



Since posting here I have found that you can purchase a 12 to 24 volt

converter and I am doing some homework on that at the moment.



Thanks for your input,

John



--

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Eric M. Jones

Joined: 10 Jan 2006
Posts: 565
Location: Massachusetts

Posted: Sat Apr 28, 2007 3:39 pm Post subject: Re: radar altimeter

I've been looking at a "short range radar altimeter" too. 



But along the way I ran into the Mattel Hotwheels Radar Gun. $25 or so. I kid you not. This thing is a functional doppler radar gun (not detector!) that will measure the speed of Hotwheels, or real objects like dogs and bicycles. Amazing piece of technology see:  http://www.edparadis.com/radar/



A little work might make a nifty radar altimeter.

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_________________
Eric M. Jones
www.PerihelionDesign.com
113 Brentwood Drive
Southbridge, MA 01550
(508) 764-2072
emjones(at)charter.net

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