they do that if it crashes or doesn't make a proper landing and if it catches fire there is no fuel to burn and there is a lot less chances of it blowing up
Airplanes sometimes will vent their fuel if they are expecting a dangerous landing. This prevents the fuel from catching fire and burning the plane and its occupants if a crash does occur.
Wings, slats, flaps, fuel tanks, rudder, elevator, landing gear, cockpit, fuselage, tail fin
A contrail is not caused by dumping fuel from a plane before landing, it occurs as a result of a visible condensation of moisture in the wake of an aircraft, missle, or rocket.
Frank Neuman has written: 'Investigation of a digital automatic aircraft landing system in turbulence' -- subject(s): Airplanes, Automatic pilot (Airplanes), Control systems, Landing 'Analysis of fuel-conservative curved decelerating approach trajectories for powered-lift and CTOL jet aircraft' -- subject(s): Airplanes, Energy conservation, Fuel, Jet planes, Landing 'Performance of several convolutional and block codes with threshold decoding' -- subject(s): Error-correcting codes (Information theory) 'Minimum-fuel, three-dimensional flightpath guidance of transport jets' -- subject(s): Fuel, Jet planes, Transport planes
Airplanes use a fuel called kerosene.
In general: no, not on a normal flight. Any fuel "left over" in the tanks will be used for the next flight. Airliners only dump fuel when they are too heavy to make a safe landing - and this situation only occurs when the landing happens much earlier than planned, such as a diversion or an emergency landing. Not all commercial airliners can dump fuel, some have no option but flying around for a while to "burn off" fuel before being light enough to make the above-mentioned early landing.
Here's a list of the things airplanes didn't have then they have now: wheel brakes. Supplement oxygen. Closed cockpits. External fuel tanks. Metal construction. Jet engines. Retractable landing gear. Missiles. Air brakes. Flaps. Armor.
Airplanes run on special fuel that is designed for them. It is called Jet fuel. It is also called white Petrol.
Aviation turbine fuel.
Depends on the amount of fuel. Every plane has a different maximum landing weight. Fuel is very heavy stuff - usually almost half a jet's weight on takeoff. Commercial flights are calculated so that by the time the jet gets to its destination, its weight has been reduced by the burning of this fuel, and it is perfectly safe to land. In an emergency, though, if an incident happens just after takeoff, a plane may have to make a fast return to its departure airport. However, it is still full of the fuel for its planned flight, and therefore over its max landing weight. If the plane is still flyable, the pilot will perform multiple spiralling descending circles, burning as much fuel as possible until it is safe to land. The pilot can also physically open the fuel tanks and dump his fuel out the back.
Fuel burning is the burning of fuel. In an automobile engine it is called combustion. The gasoline mixed with oxygen and ignited by the spark plugs explodes.
Aerobatic airplanes usually have a stronger structural frame, stiffer landing gear, and higher performance powerplants. Aerobatic airplanes are also usually equipped with engines and fuel systems which are specially designed for zero or negative G flight whereas normal aircraft will usually starve the engine of fuel (or worse, oil) during extended low or negative G flight.