WheelTug Simulation, showing the advantages at a single gate turn operation.
Overall benefits can be seen in the "Introduction to WheelTug link.
WheelTug is a powerful new system capable of allowing aircraft to taxi both backwards and forwards without the use of tugs or engines.
Using two small proprietary in-wheel electric motors, pilots can turn off their engines and realize the following benefits: Substantial fuel savings, Increased safety and flexibility of operations, Faster turnaround times, Reduced engine wear and repair costs, Reduced emissions and noise pollution
See http://www.wheeltug.gi for more information. Email firstname.lastname@example.org