How far can a plane glide and what is the maximum altitude that can achieve an aircraft ?
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What is the maximum distance a plane can fly?
Airliners. The longest range jetliner in service is the Airbus A350 XWB
Ultra Long Range, capable of flying up to 18,000 kilometres (9,700 nmi; 11,000
mi). The A380 is capable of flying 14,800 kilometres (8,000 nmi; 9,200 mi) with
544 passengers.
Can a plane fly for 24 hours?
Theoretically it is possible but even a supersonic jet would be hindered
by factors such as speed restrictions and in-flight refuelling. Yes – but only
in theory. The Earth is roughly 40,000km in circumference at the equator, and
completes one rotation every 24 hours.
Do planes fly faster at night?
At night, there's usually fewer flights and fewer passengers, so you can
definitely expect faster movements on all lines. If you dislike weaving in and
out through crowds, this is one of the best times to fly.
Can planes fly at 70000 feet?
Military Reconnaissance (Lockheed U-2)
The only comparable aircraft would be Lockheed's SR-71 Blackbird. The
U-2 was designed as a reconnaissance aircraft in the 1950s and had one engine,
made by General Electric. The U-2 had a service ceiling of 70,000 feet.
Commercial aircraft today cruise at altitudes of 30,000 feet and beyond.
When flying as a passenger, one can often hear the flight's cruising altitude
in announcements from the cockpit. Still, exactly how high are aircraft
permitted to operate? And what are the limitations of going higher?
Limits set for commercial aircraft
The maximum permitted altitude varies from aircraft to aircraft. An
optimal cruising altitude is also a factor in achieving a given aircraft's best
range. These limits guide the height that an aircraft flies at rather than any
legal or regulatory requirements. Although, of course, air traffic control in
each airspace has ultimate authority over an aircraft’s precise altitude.
Most commercial aircraft are approved to fly at a maximum of around
42,000 feet. This maximum is also known as a 'service ceiling.' For example,
for the double-decker Airbus A380 'superjumbo' quadjet, this ceiling is 43,000
feet. Meanwhile, for the Boeing 787-8 and -9 'Dreamliner,' it is 43,100 feet.
The stretched 787-10 comes in a little lower, at 41,100 feet.
To use another example, earlier Boeing 737s (up to the -500 variant)
have a service ceiling of 37,000 feet. This ceiling was increased to 41,000
feet with the introduction of the 737-600. The -600 was the first and smallest
variant of the 737 'NG' (Next Generation) family. For optimal operation, most
aircraft will be guided to fly slightly lower than this, typically around
35,000 feet.
Why fly so high?
There are several reasons why airlines would want to fly their planes at
such altitudes. The primary purpose of such operations is to optimize
efficiency. At higher altitudes, the air is thinner. This produces less
resistance, allowing the aircraft to fly faster using less fuel. Jet engines
also operate more efficiently at a higher altitude, as they can be run closer
to their maximum capabilities.
The exact height chosen for a given flight will also depend on wind
conditions. Aircraft will aim to take advantage of or minimize the adverse
effects of high-altitude jet stream winds. To help with this, pilots may find
that they need to adjust their altitude. They will also seek to avoid areas of
turbulence and adverse weather by climbing or descending accordingly if
permitted by air traffic control.
Why don’t aircraft fly higher?
This then raises the question of why not fly higher than this? And why
are there set ceiling limits? Although the thinner air creates efficiency
advantages at altitude, there is a point at which the air becomes too thin.
Much thinner air means that the engines cannot produce enough trust, and the
wings would not produce sufficient lift. There could also be problems
restarting a failed engine at a higher altitude, in the event of a failure.
There are also safety implications of flying at higher altitudes for
passengers and crew. In the event of cabin decompression, the aircraft will
descend quickly to a lower altitude. This takes more time from a higher
altitude, and this crucial difference could endanger passengers.
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