PPRuNe Forums - View Single Post - Thrust on during flare...Q for AIRBUS test pilots...
Old 31st Mar 2014, 00:55
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737Jock
 
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What do you think the windshear or turbulence does to the energy state of the aircraft? Exactly it increases or decreases the energystate!

Is this really a discussion point?

Air that moves has energy. When air moves an object it transfers this energy to the object! Think windmills that convert wind into electricity. The wind loses some of its energy when it moves the blades which happen to be aerofoils.

If you hit a downdraft you need more energy to counter it. If you hit an updraft you need to reduce energy to counter it.

Therefore it's no surprise that the thrust manages excess/lack of energy most efficiently. That's exactly what I have been saying. If you encounter an updraft reduce thrust immediately. If you encounter positive windshear reduce thrust immediately.
There is no need to wait for a huge speed excursion that it the result of your efforts to maintain on a 3 degree path and mass inertia.


Have a look at your vertical speed when you next encounter gusty winds and turbulence.

BTW under flaring or flaring too late is a pilot error it's not an energy management problem. It has very little to do with external disturbances that I described that need to be managed with energy.

Last edited by 737Jock; 31st Mar 2014 at 01:26.
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