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Strategies & Market Trends : 2026 TeoTwawKi ... 2032 Darkest Interregnum

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Dec 30 4:00 PM EST

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To: Metacomet who wrote (51000)	6/6/2009 10:24:01 PM
From: acementhead	1 Recommendation Read Replies (1) of 218847

Sort of startling that they would rely on the relatively crude pitot, a transducer, when GPS speed readings are obviously available and probably more reliable. GPS does only what it does, which is determine position. The GROUND SPEED is then determined, from consecutive positions,(usually at one second intervals) by the inbuilt computer in the GPS. Groundspeed tells one nothing about INDICATED AIRSPEED and MACH NUMBER, both of which are of vital importance for FLYING the aircraft(groundspeed is of use for navigation only). Each aircraft operating manual has a section on "Flight with unreliable airspeed" in which, inter alia, there are charts of speed for various power setting, weight, altitude. The charts also show the resultant attitude. For any given weight and altitude performance depends on power plus attitude. The imperative hierarchy of behaviour that a pilot follows. Aviate Navigate Communicate GPS is useful only for the navigating not the "aviating"(flying the aeroplane).

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