why do jet airplanes usually fly at altitudes above 30,000 ft. though it takes a lot of fuel climbing dat high

Answer 1

It's more fuel efficient to fly high. Also there is less resistance, hence the speed of sound differs as the altitude is increased. I 60 thousand feet is an ideal cruising height but then a whole bunch of issues come into play

Answer 2

It is much more fuel efficient to fly above 30,000 ft. However, it depends on a few things as to the best altitude to fly. How heavy is the aircraft, the type of aircraft, the temperature at altitude all make a big difference. For example, a 737-300 that is light will most likely be most efficient at 37,000 feet (max altitude for that model). Now if it is very heavy (close to max weight), the best altitude may be closer to 34,000 ft. We also look at where the best winds are and aircraft traffic can make a difference. If there is a airplane that is at 36000 and you want to climb up there then you have to slow down and get behind them or take a turn off course and then climb up. All use up time or gas.

Answer 3

Jet planes fly so high because that condition of flight is less expensive, because jet engines thrust can be considered almost constant with speed,whilefor propeller aircraft this decrease with speed.
Jet airplanes range increase with altitude.
At high altitudes air density is lower, and lift and drag decrease with air density, so the airplane can fly at the same EAS, keeping lift and drag the same(equivalent air speed = speed that gives the same dynamic pressure like at Sealevel ) but true airspeed is bigger.
So jet fly faster spending not much more. But flying faster their flight will take less time, so they will spend less fuel.
For Prop airplanes this is not true, their range is almost constant with altitude.
Ah, at such high altitudes there usually are no clouds.

Answer 4

There are several reasons for flying that high. One is that at high altitude the air is thinner thus less drag and that means less fuel used over the long haul. The other reason is a much smoother ride for your passengers as there are far fewer air pockets up high.

Answer 5

because the higher you go the thiner the air is. wich actually save huge amounts of fuel as the thinner air allows you to fly faster with less drag,or air to push thrrough, u know what i mean.now lets saay its a short flight like lets say.... vegas to La its a 20 min flight no reason to climb that high cause when u get to 30000 ur gonna have to come right back down right..... nope in this case it would save fuel to fly at 8000ft but the FAA restricts its for saftey reasons{ the higher u are when something goes wrong with the plane the more time u have to fix it}{the FAA restricts it because of noise polution just think of a jumbo doing a flyby 4000ft above ur house at 500mph.. that would really piss me off ... lol

Answer 6

i trust the answer for your question has broadly speaking to do with monetary device. besides the undeniable fact that there's a severe initial value in gas, at larger altitudes the planes are extra gas powerful. i found a piece of writing the position a commercial pilot addresses this difficulty and that i will provide it to you. He replaced into speaking about why the airways do not fly at 40000ft even although they could. of route at those altitudes, the version between the max and min velocities allowable is small, so that is volatile. also, now and again the airways provide up somewhat in gas performance to achieve %. a extra interest is the site visitors. contained sooner or later, it type of feels that the combination of gas performance, %, and site visitors issues bring about the options on flying altitude.

Answer 7

Thinner air while traveling. Less wind resistance means less fuel. The Concord would have done much better but it was restricted where it could fly because of the sonic booms it created at the speeds it flew.

Answer 8

Air Density At 30000 Ft

Answer 9

Its true they burn fuel while climbing that high but just imagine the amount of thrust you would need to cruise at a higher level its way less than low flight levels. Plus higher flight levels avoid climbing or descenting to avoid traffic.

Answer 10

be cause there is less traffic up there and they are above the weather and once up that high the air is thin er and the jet uses less fuel than down low'You are right it does yake allot of fuel climbing buut once there the saving is great plus the other benefits.