Airbus

the 744 is a code used for the Boeing 747-400 a model of the 747,

the original 747 is smaller than the improved 747-400

The Airbus A320 uses Jet A / Jet A-1 type fuel

35,000ft (A380-800, initial cruise altitude).

The service ceiling (maximum altitude) of this aircraft is 43,000 ft.

The Airbus A320-200 has an empty operating weight of 42,600 kg (94,000 lb). Fully loaded, the maximum take off weight is up to 78,000 kg (170,000 lb)

The first Boeing 757-200 rolled out in January of 1982 and made its first flight one month later. Whereas the Airbus A320 made its first flight in February of 1987. however Boeing just concluded the 23-year run of the 757 and ceased manufacturing them in November 2005. With exactly 1050 757-200's built and sold and over 1030 are still in service. On the other hand Airbus is still producing A320's and as of October 2011, they had sold 4,858, of which 4,765 are still in service.

it depends how the airline sets the layout, you may find on smaller companies there is no first class seats. normally there is about 20, 25, 30

The cruising speed of an A 320 is 511 mph. This is the same as

828 km/h.

The A 320-200 has a max weight of 170,000 lb. The A321 has a max of 206,000 lb

Planes can in go in reverse on the ground with the use of thrust reverser's. Clam shell doors on the back of a jet engine that reverses the thrust and will actually back up the aircraft. All modern airliners have this capability.

Yes, they are very safe.

The Airbus A321 has a total of 6 wheels - 4 for the main undercarriage landing gear (consisting of two 2 wheel bogies) and 2 for the nose landing gear.

4000 ltr per hour

The 319's max speed is Mach 0.82 or 537 mph

you

Depending on the model and airline, between 525 and 853.

Well there's no specific answer for this. there might be an average but it depends a lot on how heavy the aircraft is when it lands, how often it flies (and how long the flights are, shorter flights=more landings and take offs). And this is also a common misconception: the stereotypical large aircraft (aka airliner) landing includes a few screeches and a poof of smoke right when the tires touch down. however, contrary to popular belief, this is not what does the most damage to an aircraft tire. taxiing and high speed rolling does exponentially more wear damage to tires because when they first touch down, the weight of the entire aircraft hasn't landed on them yet, it's still suspended slightly in the air and doesn't actually settle completely on the wheels until the aircraft has slowed to about half it's landing speed, e.g. 747-400 fully loaded is about 150-160 mph landing speed. So point being, there are hundreds of different variables that affect aircraft tire life and not all the tires get changed at the same time. it is very rare to have more than two or three tires on large aircraft to wear at the same rate.

There are way too many different types of vehicles that can be explained but the main types are obviously wheeled veichles (cars, bikes and trucks)... There are also the boats

A max loaded A 380 weighs 1,200,000 at take-off. This is already considerably less than when it first rolled off the pad.

The A 380 takes off at 1,200,000 pounds.

The A 340-600 is a bit heavier. The Boeing carries more passengers and flies further.

the 777 is bigger than a a330

Vstall of an Airbus 330 varies with weight however, at 38000 feet that speed could be close to 200 KTS indicated.