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Old 6th Sep 2010, 01:45
  #564 (permalink)  
PEI_3721
 
Join Date: Mar 2006
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IGh, thanks for the extracts (# 516); we often underestimate the risks of tailwind landings.

DownIn3Green, 411A. Knowledge is important, but more so, knowing when and how to use that knowledge.
Knowledge of a tailwind approach might include a higher rate of descent (theory), but do pilots look at the approach vertical speed and associate it with a requirement to change the flare time/distance, i.e. knowing when and how to change ‘gear’ for the flare (practice).
If the HUD ‘FD’ flare path is similar to autoland, how many pilots know this, and if known who adds more flare distance to the advisory landing distance calculations.
Automation / technology per se have little to do with this, the problem is with the humans who use these facilities – how crews think about them.

Murexway, et al, – it’s another of those captivating illusions which plague human performance.
Considering a practical aspect, if most training simulators use tilt to create the illusion of acceleration, then they probably cannot create the sudden change of acceleration necessary for an actual illusion of ‘acceleration’ felt on slippery runways, i.e. an illusion cannot create an illusion.
Then how can pilots gain experience of very slippery runways other than by experiencing the real conditions? (Or as with some ‘extreme’ hazards in aviation, you don’t need to have experience of the condition if it can be avoided with reasonable certainty.)

The real illusion of ‘acceleration’ is often encountered when cancelling thrust reverse when using autobrake on a slippery runway; particularly where autobraking is not very effective due to a low setting. This illustrates a problem of routinely using autobrake (depending on it), which removes opportunities for the pilot to acquire a personal calibration of brake pedal foot-force with the achieved deceleration, for a given runway condition.
This lack of calibration (experience) also contributes to the potential for erroneous reports of runway braking action.

AirRabbit, #525. Perhaps it’s the difference between having or not having the relevant experience?
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