Berevoff wrote:I think we've seen time and time again the weight overshadows any savings.
I think designing airports with downhill taxiways to be a better option.
Berevoff wrote:I think designing airports with downhill taxiways to be a better option.
jetmatt777 wrote:Until the wind shifts and you are going uphill
mxaxai wrote:If you used in-wheel solutions during landing, or the engines whenever they are at idle during descent and landing, to charge a small battery, you could achieve (nearly) zero-emissions.
Okie wrote:APU running would also call additional fuel to produce an additional load to the alternators base load.
WIederling wrote:Extra take off when the APU or engine is running anyway is rather cheap. Most turbo machinery is notoriously inefficient below nominal power.
mxaxai wrote:If you used in-wheel solutions during landing, or the engines whenever they are at idle during descent and landing, to charge a small battery, you could achieve (nearly) zero-emissions. Additionally, the APU would be running anyway to provide hydraulics & air conditioning. They also have the benefit of very low noise, and are more independent than external tugs that have to meet the aircraft.
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