Because the air gets thinner with more altitude, and at some point the thin air can no longer give enough lift for airplanes to stay aloft.
The 'service ceiling ' is 43,097 feet.
An absolute ceiling is the maximum altitude above sea level at which an aircraft or missile can maintain horizontal flight under normal conditions.
Use wire attached to an s-hook
There are two types of maximum altitude. The first is set by the FAA and is known as Service Ceiling and the second is the maximum altitude, above sea level, at which an aircraft can maintain horizontal flight under standard atmospheric conditions. This is called Absolute Ceiling. Absolute ceiling is also affected by another factor: weight.
The absolute ceiling
The absolute Ceiling of Military Aircraft are not published. The F22 will climb "above" 50,000 feet.
The F/A-18 Hornet and the F/A-18E/F Super Hornet official performance specifications list their service/combat ceilings as 50,000ft (about 15,000m). Either craft is presumably capable of achieving greater altitudes, but no information on the absolute ceiling appears to be available.
All gliders are airplanes, but not all airplanes are gliders.
Yes, jets really are airplanes but they are faster airplanes.
the sentence for ceiling can be.. the ceiling is black
airplanes are cool
Frank W. Wead has written: 'Our greatest story-teller' -- subject(s): Juvenile literature, Motion pictures 'Airplane parts and maintenance' -- subject(s): Airplanes, Design and construction, Maintenance and repair 'Practical flying and meteorology' -- subject(s): Airplanes, Meteorology in aeronautics, Navigation (Aeronautics), Piloting 'Ceiling zero'