Thread: Braking
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singpilot singpilot is offline
I'm off the hook.....
 
Join Date: Oct 2001
Location: 22 miles south, then 11 miles west of LAS
Posts: 2,895
Yes I did. Was there the night before. My reference to decellerating THRU the hydroplane speed? Touchdown, right into anti-skid in standing water. Above hydroplane speed, no prob. Decel into hydroplane speed, wheels stop turning, ABS senses skid, releases brakes, waiting for wheels to spool up again. Of course, they are floating on water. Aint gonna happen until you slow below the hydroplane speed.

Once hydroplaning, and until that slowing below point, you pray that there is no crosswind that you have not compensated for (with aerodynamics), you'll quickly increase the reverse thrust (if you already are not maxxed out), and try to not slip off of the crown of the runway. In the old days, you'd pray for a deep puddle. Modern runways no longer have those.

The big rat hydroplaned right off of the end of that water covered runway in Bangkok. They reduced reverse thrust on the initial landing roll because they got sideways (crosswind, asymetric reverse, or slipped off of the crown, or a combo of all three), and wanted to get straightened out before resuming reverse thrust.

Oops. First accident in the history of the airline. Sad deal.

There is an old saying... Given only two choices, I'd rather take the grass at the side of the runway at 90 knots than the fence at the end of the runway at 40 knots.

We've got a lot of guys out there that have forgotten that saying.
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No, I don't sing. Based there for too long.
Old 01-23-2006, 08:55 PM
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