edit: Jeff Alton beat me to this one 
Quote:
Originally Posted by cashflyer
But try this... Given a plane with a 30mph takeoff speed, and an runway with a 30mph tailwind, will the plane fly? If so, what will the takeoff speed be?
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30mph tailwind means essentially a -30mph indicated wind speed at standstill on the runway.
If the plane moves down the runway at 30mph ground speed, the tailwind is essentially negated since the air moving over the wing is moving at 0mph.
Increasing ground speed by another 30mph to 60mph ground speed will also increase wind speed by an additional 30mph, meaning at 60mph ground speed the air moving the wings will hit 30mph and allow the plane to take off.
Right?
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Grant
In the stable: 1938 Buick Special model 41, 1963 Solex 2200, 1973 Vespa Primavera 125, 1974 Vespa Rally 200, 1986 VW Vanagon Syncro Westfalia, 1989 VW Doka Tristar, 1995 Toyota Land Cruiser, 2011 Pursuit 315 OS, 2022 Tesla Y
Gone but not forgotten: 1973 VW Beetle, 1989 Porsche 944, 2008 R56 Mini Cooper S
Last edited by Tishabet; 01-31-2008 at 03:20 PM..
Reason: Jeff Alton
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