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Estimates have also been made of the cost to airlines of their disrupted business. British Airways had to cancel 1280 flights, at a cost of £40 million. [50] Ryanair are suing the UK government for the £3.3 million the cancellations cost them. [51] Easyjet had to cancel 469 flights, at a cost of about £4 million. [52]
At constant prices, world airlines RASK fell by 51% from US¢17.5 in 1960 to 8.6 cents in 2015, while CASK went 54% down from 17.5 to 8.1. [5] For the world airline industry between 2003 and 2017, CASK excluding fuel was around US¢6, fuel CASK was between US¢1 and US¢3.5, and RASK was between US¢7 and US¢10. [6]
Fuel dumping of an Airbus A340-600 above the Atlantic Ocean near Nova Scotia Fuel dump nozzle of an Airbus A340-300. Fuel dumping (or a fuel jettison) is a procedure used by aircraft in certain emergency situations before a return to the airport shortly after takeoff, or before landing short of the intended destination (emergency landing) to reduce the aircraft's weight.
Piston-engined aircraft use leaded gasoline and those with diesel engines may use jet fuel (kerosene). [1] By 2012, all aircraft operated by the U.S. Air Force had been certified to use a 50–50 blend of kerosene and synthetic fuel derived from coal or natural gas as a way of stabilizing the cost of fuel. [2]
The propellant mass fraction is the ratio of just the propellant to the entire mass of the vehicle at takeoff (propellant plus dry mass). In the cases of a single-stage-to-orbit (SSTO) vehicle or suborbital vehicle, the mass fraction equals the propellant mass fraction, which is simply the fuel mass divided by the mass of the full spaceship.
During the 2009-2010 period, the studies for the airline industry have shown the average hedging ratio to be 64%. [citation needed] Especially during the peak stress periods, the ratio tends to increase. Southwest Airlines has tended to hedge a greater portion of its fuel needs as compared to other major U.S. domestic carriers. [3]
Volume percent is the concentration of a certain solute, measured by volume, in a solution.It has as a denominator the volume of the mixture itself, as usual for expressions of concentration, [2] rather than the total of all the individual components’ volumes prior to mixing:
The first federal gasoline tax in the United States was created on June 6, 1932, with the enactment of the Revenue Act of 1932, which taxed 1¢/gal (0.3¢/L). Since 1993, the US federal gasoline tax has been unchanged (and not adjusted for inflation of nearly 113 percent through 2023) at 18.4¢/gal (4.86¢/L).