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In aviation, ceiling is a measurement of the height of the base of the lowest clouds (not to be confused with cloud base which has a specific definition) that cover more than half of the sky (more than 4 oktas) relative to the ground.
Most commercial jetliners have a service (or certified) ceiling of under 45,000 ft (13,700 m) [3] and some business jets about 51,000 ft (15.5 km; 9.7 mi). [4] Before its retirement, the Concorde supersonic transport (SST) (as well as the Tupolev Tu-144 before it was retired) routinely flew at 60,000 ft (18.3 km; 11.4 mi).
Planform view of an Air Tahiti Nui 787-9 showing its 9.6 wing aspect ratio and 32° wing sweep Front view of a Vietnam Airlines 787-10, the fuselage is 19 ft (5.8 m) wide and 19 + 1 ⁄ 2 ft (5.94 m) high while the fan has a 9.3 ft (2.8 m) diameter
The General Electric GE90-115B of the earlier 777-200LR and -300ER variants has a 42:1 overall pressure ratio and 23:1 HP compressor ratio. Rolls-Royce Plc proposed its RB3025 concept with a 132 in (335 cm) fan diameter, a 12:1 bypass ratio, and a 62:1 overall pressure ratio, targeting a fuel burn of more than 10% lower than the GE90-115B and 15% lower than its Trent 800 powering the 777; the ...
Highest maximum internal height of any church (from the floor to the ceiling of the lantern). AT&T Stadium: 91 m 91 m Arlington United States: Florence Cathedral ~87 m ~103 m ~90 m [9] [10] [11] ~110 m 114.5 m [11] 42 m Florence Italy: Avicii Arena ~85 m [12] ~85 m ~85 m ~85 m 85 m [12] 110 m Stockholm Sweden: Largest Spherical Building in the ...
In aviation, atmospheric sciences and broadcasting, a height above ground level (AGL [1] or HAGL) is a height measured with respect to the underlying ground surface.This is as opposed to height above mean sea level (AMSL or HAMSL), height above ellipsoid (HAE, as reported by a GPS receiver), or height above average terrain (AAT or HAAT, in broadcast engineering).
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h = Ceiling height (feet or meters) One cubic meter per minute = 16.67 liter/second Air change rate recommendations ... [9] Methods of measurement