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Fuel temperature inside the plane

The fuel temperature in flight depends logically reaches the land it owns in the plane before takeoff, also depends on external conditions in flight and the plane itself. To understand the problem we place the plane at Mach 0.84, the typical speed of most aircraft in cruise flight, and suppose an outside temperature of -40 ° C.

Much of jet fuel in the tanks is located in the wing, are in fact deposits "integral" in the sense that leverage the internal volume that leaves the wing structure.

We mean by this that no heat transfer between the metal coating wing and the fuel is in storage. What is the temperature of the metal coating of the wing in such conditions? If your temperature is very high radiation heat into the fuel tanks and heat, if it stays cold radiates little heat and the fuel temperature is little affected.

Well, in our case, the temperature of the plate of the wing at the point of impact of air, in this case is 4.5 ° C (positive). Far from the points of impact of air warming effect is lower and the temperature of the sheet is less the point is that, at that time, establishing a set of thermal equilibrium between the heat source that represents the sheet wing lining, heated by air friction, and mass of fuel in the tanks.

As the temperature of the fuel in the tanks of the plane

In the game of thermal balance occurs in the deposits shows that, regardless of the temperature of combustit) it to the output, it merges to a mean value only, around five or six hours of flight. The minimum fuel temperature is reached somewhat later, so that the fuel is still releasing heat to the last three or four hours of flight where the inflection occurs and the temperature increases.

This is mainly due to the heat source is the sheet of coating, heat number more or less constant, act now on a smaller mass of fuel, which heats up. All aircraft have a temperature gauge in the fuel tanks.

The operational significance of the point of crystallization of the basic fuel. The presence of a gelatinous substance in the tanks of course does not fall within the schemes of operation of the pumps that carry fuel to the engine.

If you allow the fuel temperature falls beyond its point of crystallization begin formation of structures Wax deposits, with a mass that is present in two phases, liquid and solid. Commercial aircraft are ready to heat the fuel in the inlet filters of the engines, so that liquefy any substance, ice or wax, which is present in the fuel.

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The first class on the A380 Portugal Air Show

Singapore Airlines surprised everyone with his first-class suites. Authentic closed rooms (almost). Emirates, meanwhile, opted for a more conservative but adding, for the first time in a commercial airliner, which until now was reserved for corporate aircraft of a certain size: showers. Qantas

finally was the least innovative of the three, but also taking a step beyond the service offered over other aircraft in its fleet. Although Air France and Lufthansa, the airline will incorporate the upcoming A380, in 2009, have not released details of its aircraft equipment, it appears that the first class will be more similar to that of Qantas to Singapore Airlines .

Singapore, is perhaps the most awarded airline around the world, kept secret the interior of his plane until the day of delivery. The others too, but Emirates and Qantas were not as successful. Of course, Qantas is one of the few airlines Airbus requiring that shooting is prohibited within the precincts of Airbus outside their aircraft before delivery. This prohibition is limited to the press, as the staff of Airbus, airlines and their guests, who come to the guided tours of the facilities are prohibited from shooting.

As the first class in the A380

order of delivery, Singapore Airlines has equipped its first class / Suites (as referred to differentiate it from the first of other aircraft in its float). The highlight is the fact that pairs of seats can remain independent central or coalesce to form a double cabin. This is particularly evident if we think that the seats turn into beds by folding down the rear bulkhead of the cabin, and both are flush as a double bed.

Yes, the executives made it clear that Singapore would not admit certain "parties" in their double cabins.

Emirates, has also opted for some suites, though very different from Singapore. Basically there are first class seats with doors for privacy. However, it has looked like a decoration to the Middle East, finished in timber, gold, mirrors, lamps ...

Qantas, meanwhile has followed a different approach to both individual seats that rotate to one side to spread out, watch TV, eat, etc.. In addition, the windows of these seats have a double electric curtain is operated from the same control functions of the seat and inflight entertainment system.