Taxi on electrical power
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Taxi on electrical power
Just saw on flightglobal.com. Quite promising, isn't it?
VIDEO: L-3 and Lufthansa get moving with e-taxi demonstrator
VIDEO: L-3 and Lufthansa get moving with e-taxi demonstrator
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Isn't it more efficient to use ground based systems like jetTRACS?
Attaching electrical motors to the MLG increases ac weight.
This is reducing efficiency during flight.
Furthermore, visibility for pilot is limited when going backwards, even
when using a camera systems.
Attaching electrical motors to the MLG increases ac weight.
This is reducing efficiency during flight.
Furthermore, visibility for pilot is limited when going backwards, even
when using a camera systems.
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Attaching electrical motors to the MLG increases ac weight. This is reducing efficiency during flight.
Furthermore, visibility for pilot is limited when going backwards, even when using a camera systems.
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True - but if sufficient fuel is saved during the taxy out then you wouldn't have to load that fuel load to begin with.
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Extra fuel is gone after taxi and before going airborne, but motor is still there.
You'll consume extra fuel at about 4% of the weight of the motors per hour of flight. The maths shouldn't be too difficult.
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So you have to stop somewhere approximately 2 minutes taxi time from the runway to start your engines. Then when one doesn't start eco taxi back to the ramp to get maintenance to have a look before having another go. Meanwhile everyone else in the queue is fighting over when to stop and start engines.
For some overcrowded hubs at rush hour this may be ok but can you imagine being in the 40 minute taxi queue at JFK only to have to taxi back in with a problem?
For all the other times when your taxi is less than 10 minutes this just will never pay for itself. A ground based solution is a much better idea as it adds no extra weight.
But when you're driven by a tech company trying to sell stuff and confused by illogical "green" arguments I guess you'll give anything a go.
For some overcrowded hubs at rush hour this may be ok but can you imagine being in the 40 minute taxi queue at JFK only to have to taxi back in with a problem?
For all the other times when your taxi is less than 10 minutes this just will never pay for itself. A ground based solution is a much better idea as it adds no extra weight.
But when you're driven by a tech company trying to sell stuff and confused by illogical "green" arguments I guess you'll give anything a go.
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When I was at school, energy could not be created or destroyed, merely converted from one form to another, and undesirable losses normally occurred during the conversion processes.
I am not a physicist, but surely the conversion chain from chemical to electrical then to kinetic is a longer and more wasteful one than chemical to kinetic. Then as mentioned above, the carriage of motors, cabling and coolant would be very wasteful over time.
The green argument is looking a little thin.
I am not a physicist, but surely the conversion chain from chemical to electrical then to kinetic is a longer and more wasteful one than chemical to kinetic. Then as mentioned above, the carriage of motors, cabling and coolant would be very wasteful over time.
The green argument is looking a little thin.
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It is only an experiment in a early phase. Keep cool....
And as far as i know, they replace 2 of the 4 brakes by an motor which can also be used as a eddy current brake (in the future).
And as far as i know, they replace 2 of the 4 brakes by an motor which can also be used as a eddy current brake (in the future).
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How is that relevant?
