because climate matters
Jet airliner’s engines slow evolution towards fuel efficiency
1. Early jet engines
Above formula shows thrust depending on the mass of air passing through the engine and on the (excess) speed at which this air leaves the engine’s nozzle. Early jet airliners used engines which ejected all air with a very high velocity thought their nozzles. These engines were most effective at speeds close to the speed of sound, e.g. Mach (M) 0,85. Continue reading “The Jet-Engine”
Low prices for fuel and CO2 emissions make airlines focus on fuel-thirsty speeds
1. Airlines always get what they want
Aircrafts are designed around an airline’s business plan. Designers optimise an aircraft’s fuselage, it’s wings and engines to fly with a specific speed to gain an airline the highest profits. The higher it’s speed, the more fuel an aircraft consumes, but the lower are it’s other costs. Continue reading “The price for kerosene defines the airliners that are built”