Can someone explain what this means? Regarding on reduction of aircraft weight to save fuel.?

Question

Additional fuel requirement: approx2.6 % of OWE

weight increase x hours flown

– e.g. extra weight = 500 kg

– flight time = 1.5 hours~~ 500 nm.

– extra fuel burn = 30 - 50 kg

– extra CO2 = 100 -160 kg

Assuming 3,000 hours/year

• extra fuel burn = 60 000 – 100 000 kg

• extra CO2 = 190 000-315 000 kg

• extra cost = $ 41 000 – 69 000 $US / years / aircraft

(@ 2.10$US /Gallon)

- and that’s just the extra-cost due to fuel, per

aircraft!

Taken from: http://www.icao.int/icao/en/env/WorkshopFuelEmissions/Presentations/Viscotchi.pdf

Answer 1

This formula means that for every extra 500kg at 1.5 hours of flight x annualflight hours of 3000hrs it costs $41-$69K extra.

Simply is means that is takes more power to make a brick fly than a feather.

or

More engine power is required to make heavier things fly = more $.