No Engine Bleed Takeoff B737
Hi!
My company operates all takeoffs as No Engine Bleed takeoffs to save the engines (B737 Classic + NG).
There has been no documentation put forward to help explain to us how much we actually save by doing this in terms of EGT/saved maintenance costs. Considering the extra fuel burn to the APU and the associated higher maintenance costs - is this really cost effective?
With max derate and assumed temperature of 60 - how much is then saved by using this procedure?