Question of the day.what is the highest hight for commercial aircraft i thought it was33.00thousand feet?

Question

Question of the day.what is the highest hight for commercial aircraft i thought it was33.00thousand feet?

Answer 1

It is much higher than 35000 ft.  It will be much closer to 41000 ft for commercial aircraft, obviously not counting the concorde (which no longer operates).  Above 410 is the biz jet terratory, which operate all the way up to 51000 ft.  Some of the older commercial aircraft, md-80 for example can't go up to 410, but many newer ones can.

Answer 2

It is somewhere around 35,000

Answer 3

It's mostly to do with engine efficiency, not pressurisation issues.  And, for that matter, the length of the flight.  Most commercial jets cruise around the mid 30's, but it's not set in stone, turboprops around the mid 20's for the same efficiency reasons.  However, some commercial jets cruise a lot higher and the "bizjets" are often found in the 40's.

All this is assuming there are no restrictions for traffic reasons . . .

Answer 4

They can go higher. An aircraft is not limited due to pressurization, it is due to engine efficiency.

Flight levels go up to 60 thousand feet and anything over that is military.

Commercial flights range from 30 -36thousand on average because if depressurization occurs they have minutes to get down to breathable atmosphere. The new aircrafts will be able to cruise higher, but do to the requirement in an emergency, it is doubtful they will get that high unless they can descend in time.

Answer 5

The highest height at which commercial jets can fly is around 43 thousand feet.

This however depends on a number of factors such as engine specification, model of aircraft and so on.

Above 43 thousand feet is generally thought to be the domain of the business jets and the military.

One exception to this is the Concorde which cruises at 51 thousand feet where the air is cooler so that it reduces friction on the aeroplane at mach 2

Answer 6

FL330 is a typcal crusing alt, but not the highest. Most lear jets and business jets  fly at or above FL40, and some can fly higher  FL510. The Citaion X is ceritfied to fly to FL510.

Most commerical aircraft stick to the low to mid 30's becasue of pressuriztion issues, becasue of the max pressure differnatial limit. Anything higer would result in a high cabin altitude, that is both uncomfortable for passengers and if too high, would require supplemental oxygen, which no passenger would be willing to wear. Also most older jets dont fly that high because RVSM requirements, and oxygen requirements. Some older aircraft do not have the supplemental oxygen systems for the pilots that are certified for use at those high of alitudes, as they require a pressure demand system, as most have a diluter demand system.

Answer 7

Around 60000ft. For concorde anyway.

Current jets will get to about 40 - 45000 ft.

Answer 8

yes its around that but they can go alot higher if needed

Answer 9

By "commercial aircraft", do you mean airliners? Actually, a charter is a commercial operation and can invlove virtually any aircraft type.

Most airliners are certificated to 41,000 or less, and typically fly in the 30s, mostly FL 370 or below. Some bizjets are approved only to FL 410, some can climb directly to altitudes higher than FL410, some step climb to altitudes above 410. Weight (not pressurization) is a primary factor for airliners and for aircraft requiring a step climb.

I have flown at FL 430 many times, and at FL450 a few times----in bizjets.

Answer 10

777/747=39000

Answer 11

Lord Snob is a bullshitter

commercial aircraft fly, or in other words, cruise,  anywhere from 18,000 feet to 43,000feet. they obviously go lower for landings and takeoffs

.

they usually don't exceed 42K because of the difference in cabin pressure and the danger of explosive decompression and aircraft skin stress.

smaller executive jets sometimes fly even higher not to mention military and research aircraft.

Answer 12

Me" Chicago ( Ohare to Philadelphia ) United  767, 40000 ft.

Newark to milan, italy, Boeing 777, 39,000 ft.

Check the link, you will see a model of the B737 is ceritfied for 41,000 ft.

Answer 13

Your answers are about right, in that most commercial aircraft are specification limited to about 45,000 ft

Otherwise there are problems with stability / cabin pressure / engine air intake & allsorts.

Concorde, though, a commercial aircraft could easily attain 65,000 ft

More a "military" height

The silly little Cessna 152 that I drive is only good for 12,000ft before it runs out of steam

Answer 14

Concorde had a max altitude of 60,000 ft.  But it flew below that most of the time.  They actually had a radiometer in the cockpit to measure the radiation exposure during the flight.  When it got to a certain point, they would descent to below 40,000 ft.  The higher the altitude, the greater the radiation exposure.

Answer 15

Firstly, many of the answers here are misleading, I'm a private pilot and flight instructor in the northwest with extensive knowledge of aircraft and atmospheric effects on aircraft.

So don't provide stupid answers like pressurisation, as the main contribution that prohibit a passenger jet for reaching in excess of it's service ceiling.

If you don't know, then don't answer, it would be nice for a change if there were REAL pilots here.

Instead of pretending to be what your not.

I mean do you know the difference between airspeed and ground speed?

Many commercial aircraft have a service ceiling of 41,000 ft and as mentioned by another member, biz jets can achieve a service celing of 52,000ft.

Don't give rough estimates, different aircraft have different service  heights, such as the 737 classics and 737 NG's.



The altitude at which jet powered aircraft can maintain sufficient altitude and airspeed is known as the absolute ceiling height.

Many factors that prevent a passenger jet for reaching higher altitude in excess of its service height. include

(Air density)

The higher an aircraft climbs the thinner the air becomes. As an aircraft climbs the airspeed begins to drop even if the ground speed is still maintained.

ie

Mach 7.4 at sea level requires more fuel burn than at 39,000 ft, at sea level a dangerous airspeed of over 300 knots would have to be achieved to reach mach 7.4, but at 39,000 ft the airspeed would read just over 200 knots closer to it's stall speed than the structural speed.

Aircraft such as the U2 spy plane can achieve the highest service ceiling, 85,000ft. The large glider wing design means that the aircraft has a low stall speed, probably under 100 knots.

This enables the aircraft to achieve level flight and adequate ground speed without stalling.

At this altittude the U2 is always flying close to it's stall speed, but mainting a ground speed of over 400 knots.

So this explains in one part why a passnger jet cannot climb higher.

'The higher an aircraft climbs outside its service ceiling, the less the airspeed becomes for sufficient lift'.

A high angle of attack is noticeable at these cruising altitude.

Second reason

( pressurisation).

Similar to the above explanation, airspeed becomes more thin as an aircraft climbs higher, outside of the troposphere many military aircraft have to wear pressure suits, similar to space suits.

Flying above 41,000 ft requires the same pressure as 39,000ft but as the air becomes thinner the differences in pressure outside becomes more noticeable on the structure of the aircraft.

Third reason

(Turbine combustion)

Similar to the last three, air density plays a massive role in restricting an aircrafts capabilties.

Turbines, or N1 blades play a high role in the thrust of a turbine engine, at altitudes above 85,000 ft the air is very thin and requires a higher airspeed to achieve the same air compression as a 737 at a lower 39,000 ft.

Compression is acieved when the front N1 blades such in air and compresses at a higher pressure for fuel spray ignition, N2 blades is a compressor blade which forces the combustion out at a higher speed, as thrust.

Climbing above 50,000 ft in a 737 would require a higher airspeed to achieve the same compression of air at a lower altitude.

Answer 16

45,000  is the max for commercial aircraft.  They don't usually go higher that 43,000 because of instability issues, pressure and recommendations by the manufacturers.  There are aircraft that can go higher but so far nothing commercial.  They are primarily military and research aircraft.

R~

Answer 17

It does vary before you hit the black stuff (space). We came back on an airbus from Singapore and the info on the bulkhead (moving matrix) displayed our height as 42,000 feet, which I thought was quite high.

However, an RAF pilot (fast jets) stated that it is OK for combat jets to exceed 47,000 feet.

I get to think that commercials then are restricted.

Answer 18

The Concorde when it was still flying, cruised at about 56,000 ft. Boeing 747 cruses at about 35,000 ft. The Airbus A380 has a service ceiling of 43,000 ft, but will probably cruse a bit lower than that.