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From: mmallory@netcom.com (Mark Mallory)
Subject: Re: Behind the Power Curve
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Date: Wed, 24 Mar 1999 02:01:35 GMT
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Andrew Sarangan (sarangan@unm.edu) wrote:
: Anytime you lower the nose, regardless of whether you are behind or ahead of
: the power curve you will lose some altitude before picking up speed. For a
: given increase in airspeed you will lose more altitude when you are 
: behind the power curve than when you are ahead of the power curve.

Actually, it's just the opposite: the faster you are going, the *greater* 
the Kinetic Energy increase required for a given speed increase.  Since 
the increase in KE equals the loss in PE (altitude), more altitude is 
lost for a given ktas airspeed increase at higher speeds than at lower 
speeds.  Approximately *twice* as much altitude is lost accelerating from 
60 to 65 kts, as is lost accelerating from 120 to 125 kts.  

This is part of the reason that Windshear is a more serious hazard for 
Airliners than for light aircraft.


