Here’s The Situation:
You are flying an aircraft to a destination that is far beyond the capabilities of the aircraft with full fuel and no PAX or Cargo.
Does powering off half, 1/3, and/or 1/4 of the engines reduce fuel usage, letting you be able to get to the destination?
Flying non-stop from KBWI to PHNL in a Southwest 737-800. The Southwest -800 (and all -800s) has 8-9 hours of fuel and the flight is 10-11 hours at Mach 0.76-0.80 (cruising speed in the 737-800). Does shutting off one of the engines allow you to maintain your speed at a lower altitude, and reduce fuel usage?