on the 737 you don't have to do anything special,just close the start lever.It takes about 1 sec....fuel usage around 5-6 kg /min.
For 2 min- 10-12 kg save. For one flight 20-24 kg savings. If I do 15 flights /month result 300-360kg. For 10months (as we have 2 months vacation
) result 3000-3600kg.
And if we are,let's say 50 cpt's then on one year is about 150T to 180T.
What do you think now about the 2 min single engine taxi?
For climb,would it be more economical to fly max rate?