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What is the difference between takeoff weight and landing weight of aircrafts and how it calculated?
Is ramp weigt less trip fuel
Do space shuttles use fuel?
Space shuttles use fuel when taking off and for control while in orbit, deorbiting, and landing. The main takeoff engines use liquid hydrogen and liquid oxygen, and there are two solid-fuel rocket boosters. In orbit, the shuttle uses thrusters that burn hydrazine and nitrogen tetroxide.
Why airplanes burning off fuel before landing?
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
Do aircraft dump fuel before landing?
Not normally. This is an emergency procedure sometimes done because the maximum takeoff weight is usually larger than the maximum landing weight on aircraft carrying large passenger or freight loads. The dumping of fuel is one action that can be used in an inflight emergency; however, I can guarantee that the takeoff weight of ANY aircraft (unless refueled in flight) is ALWAYS greater than said aircraft's landing weight. Fuel used enroute will always reduce the gross landing weight. Aircraft are generally serviced with enough fuel to make its primary destination and an alternate runway (due of emergency). The landing weight can be adjusted by dumping fuel (normally) in case of damage to the aircraft or destination runway conditions (snow/ice, rain) requiring a lighter aircraft gross landing weight. Naval aircraft operating from Carriers routinely dump fuel to adjust for landing conditions (wet deck, reduced landing area, slower ship speed into the wind, etc...).
How is the fuel consumption of Boeing 767-300er?
The exact fuel consumption is variable as certain periods such as takeoff and early cruise will burn more fuel. That being said, at cruising altitude a 767-300ER with the RB211-524H power plants will burn around 4200 kilograms per hour.
Do commercial jets dump its fuel before landing?
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.
How much fuel does an Airbus burn during take off?
The amount of fuel burned during takeoff is dependant on the airport, weather, type and number of engines and the load being carried. High altitude airports like Denver (5,550ft above sea level) require considerably more fuel than lower lying ports like JFK (13ft) or LHR (83 ft) because of the thinner atmosphere. A typical full thrust takeoff in a twin engined wide-body would have a fuel flow in the area of 6000kg/hr. Reduced thrust takeoff (night/low load) would be closer to 5000kg/hr. Four-engined planes would use approximately twice this rate of fuel. This rate of fuel only applies for the first 2 minutes of flight,so the actual fuel used would be in the area of 160-200kg (50-60 US Gallons) for a twin.
Why must you turn off electronics during airplane takeoff?
The reason they don't want you using personal electronics during takeoff and landing is that most personal electronics, even though they're shielded and not supposed to emit much, emit certain amounts of RFI (Radio Frequency Interference). While one or two devices might not interfere, a lot of them could interfere with aircraft pilot-ground communications, which is critical during takeoff and landing, when the aircraft is most vulnerable. If there is an emergency, the pilot needs to have clear communication with the Air Traffic Controller for emergency instructions and other necessary coms. Cell Phones and Notebooks are the biggest RFI and EMI (electromagnetic interference) offenders - even though they're shielded, they still emit quite a bit of interference, and cell phones by their nature could theoretically directly overlap an emergency com frequency that the pilot is using. If you've ever noticed the bulge cylinder on the end of some computer and AC adapter cables, that's a device specifically designed for RFI reduction. But not all cables have those. On another note, any fuel leak vapors during takeoff and landing could also be set off by the use of personal electronic devices if the plane were forced to abort the takeoff and a tank ruptured, though RFI is the primary concern. Same if the plane had a hard landing that resulted in a wing tank rupture and subsequent fuel leak. It's the same reason you're asked to turn your cell phones off while fueling your car.
How much fuel does an Airbus A330 use on takeoff?
2000 ltrs
What is the landing and takeoff speed for an airplane?
The simplest answer: for an average-sized commercial jetliner with typical fuel and payload, the "takeoff speed" is around 130-160 knots, or about 150 to 200 miles per hour. The landing speed is more or less the same, usually a few knots slower. The landing/takeoff speed can range from 105 knots for a light commuter jet to nearly 200 knots for the Concorde. In reality, many factors affect the speed at which the pilot pulls back on the flight yoke (called VR or "rotation" speed) and the speed at which the aircraft can safely leave the ground. The minimum takeoff speed is typically at least 1.3 times the speed at which it is moving quickly enough to actually generate lift (called "VS"). The variables include aircraft weight (more weight requires a faster takeoff speed), temperature, airport elevation, humidity, and degree of flaps (up to a point, increased flaps create greater lift in the wings and may allow a slower takeoff speed). Therefore, in order to fly the aircraft as safely as possible, numerous speeds including VR (rotation speed), V1 (continue takeoff even with one engine out), V2 (safety climbing speed with one engine out) and VREF (touchdown speed) must be computed in advance. On most modern-day airliners, the cockpit is supplied with a Flight Management System in which pilots can enter weight and flap conditions and the system will compute several speeds used during takeoff and landing.
Does a plane dump its fuel before it lands?
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.
Why is a Boeing 747 always heavier at take-off than at landing?
The 747 is lighter on landing because of the fuel it burned off during flight. This is true for all planes.
