USA TODAY US Edition

Do pilots get as upset over delays as travelers?

- John Cox John Cox is a retired airline captain with US Airways and runs his own aviation safety consulting company.

Q: How are flight times establishe­d? I’ve noticed that the actual times are often much less than predicted, sometimes close to half as long as scheduled. Also, when does the clock start: boarding, push back or wheels up?

— Jim Pivirotto, Myrtle Beach, S.C.

A: Airlines create flight times based on the previous history of the flight. As an example, every airline flying into New York on a Friday afternoon knows that there will be delays, so additional time is added to the schedule. This added time is not needed for an 11 p.m. arrival on a Sunday.

If an average flight time includes additional planning time and the flight does not experience the anticipate­d delays, you can arrive well ahead of schedule.

Airlines use four times for operationa­l purposes:

Out — When the door is closed for departure and push back starts.

Off — When the airplane becomes airborne.

On — When the airplane touches down.

In — When the airplane opens the door at the gate.

Flight time is Off to On. Block time is Out to In.

Q: How long does it take a commercial jet to take off ?

— Alan Taylor Chemainus, Vancouver Island

A: A normal takeoff run is around 35 seconds. Some airplanes, such as a very heavily loaded four-engine model, may have a much longer ground run, around 50 seconds. Takeoffs are not calculated based on time, but on airspeed after calculatin­g the performanc­e variables.

Q: Do the pilots get just as mad as passengers when left on tarmac for hours?

— James, Cincinnati

A: Pilots can be just as frustrated as passengers during delays.

 ?? MANUEL BALCE CENETA, AP ?? A jet takes off from Reagan Washington National Airport.
MANUEL BALCE CENETA, AP A jet takes off from Reagan Washington National Airport.

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