Airplane engines may be classified as driven by propeller, jet, turbojet, or rocket. Most engines originally were of the internal-combustion, piston-operated type, which may be air- or liquid-cooled.
Seventy-five thousand engineering drawings were used to produce the first Boeing 747.
The first United States coast to coast airplane flight occurred in 1911 and took 49 days.
A Boeing 737 weighing 150,000 pounds (68,000 kg) must deflect about 88,000 pounds (40,000 kg) of air - over a million cubic feet (31,500 cubit metres) down by 55 feet (16.75 m) each second while in flight.
The fastest passenger aircraft was the concorde but its no longer in service. The fastest aircraft is SR-71 Blackbird i believe. But I heard somewhere that NASA is working on a hypersonic aircraft
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