NEW DELHI: Budget airline SpiceJet on Wednesday said it has tied-up with 'WheelTugPlc' for reserving 400 production slots for aircraft electric taxi system. Accordingly, the airline plans to induct 'WheelTug' into its B737 operations SpiceJet is the largest Boeing 737 operator in India. The move is expected to enable the airline to save fuel, reducing CO2 emissions as well as noise levels, optimise its fleet utilisation thereby improving the bottom line. Notably, the 'WheelTug' system places high-torque motors in the nose wheels of the aircraft. Pilots control the aircraft themselves, performing ground operations without requiring tugs for maneuvers. (IANS)