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Why do planes have a service ceiling?
The service ceiling is the maximum usable altitude of an aircraft. Specifically, it is the density altitude at which flying in a clean configuration, at the best rate of climb airspeed for that altitude and with all engines operating and producing maximum continuous power, will produce a given rate of climb.
Why are there only two world manufacturers Boeing and Airbus that produce large commercial aircraft?
Two main factors are the reason who Airbus and Boeing’s dominance over the airplane manufacturing industry: money and history. With both of these factors on their side, Airbus and Boeing can easily maintain their positions as the top companies. Manufacturing airplanes requires significant costs.
What is the max ceiling of a 747?
45,100 feet
Technical Specifications – Current Presidential Airplane (Boeing 747-200)
| Crew | 26 (passenger/crew capacity: 102) |
|---|---|
| Wing span | 195 feet, 8 inches (59.64 m) |
| Length | 231 feet, 10 inches (70.66 m) |
| Height | 63 feet, 5 inches (19.33 m) |
| Service ceiling | 45,100 feet (13.747 m) |
What was the maximum ceiling of a Boeing 747?
When Boeing introduced the 747-100 in 1969, its maximum ceiling was 45,100 feet; half a century later, when Boeing introduced the 777x, its maximum ceiling was 43,100 feet.
Why does an airliner need a higher service ceiling?
An additional benefit is the colder air which increases the efficiency of heat engines. Since this helpful drop in temperature ceases once the aircraft climbs above the tropopause, the benefits of flying higher increase most below the tropopause. With increasing flight altitude, the airliner needs:
When did Boeing lose the refuelling contract to Airbus?
The announcement in March 2008 that Boeing had lost a US$40 billion refuelling aircraft contract to Northrop Grumman and Airbus for the EADS/Northrop Grumman KC-45 with the United States Air Force drew angry protests in the United States Congress.
Which is the highest selling plane Boeing or Airbus?
In August 2018, the A321 had outsold the 737-900 three to one, as the A321neo was again dominating the 737-9 MAX, to be joined by the 737-10 MAX. In October 2019, ultimately, the A320 family surpassed the Boeing 737 to become the highest-selling airliner with a total order of 15,193 and respectively 15,136 aircraft at the end of the month.