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The Rocky Mtn umonitor also does true airspeed, and Mach number for those of your with very fast airplanes. I have one that I used a while. It is really a flight data computer of sorts!
Marc Wiese
From: "Marvin Kaye" <marv@lancaironline.net>
Date: 2005/01/04 Tue PM 04:05:03 GMT
To: "Rotary motors in aircraft" <flyrotary@lancaironline.net>
Subject: [FlyRotary] Re: IAS and Vne! Whoa!
"Ed Anderson" <eanderson@carolina.rr.com> wrote:
"""
The bottom line is that at the higher altitudes your indicated airspeed gauge
can be showing you safely below the Red Vne mark but, your True Airspeed may
be exceeding Vne by a considerably margin putting your airframe in a
potentially danger zone of flutter.
"""
The Lancair IVPs, being designed for turbocharged flight, spend most of their cruise time in the flight levels. Vne for that aircraft is mach .52... the Cheltons (and other glass cockpits, I imagine) have the ability to monitor that speed directly, and Vne is adjusted and displayed based on altitude, OAT, etc (ie, TAS). The Vne parameter is entered as a mach number in the Chelton's setup mode. Pretty amazing stuff.
<Marv>
>> Homepage: http://www.flyrotary.com/
>> Archive: http://lancaironline.net/lists/flyrotary/List.html
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