Other Definitions
free fall (dict)
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Free-fallFree-fall or free fall in the strict sense is the condition of acceleration which is due only to gravity. In other words, the objects undergoing freefall experience only one force: their own weight. Examples include: as opposed to the cases where other forces are acting, including: More generally, freefall is the condition of acceleration which is due only to gravity and air friction: in parachuting, freefall (skydiving) refers to the act of falling and delaying the opening of a parachute. Freeflying is skydiving in other body positions than the more standard belly flying. With air friction acting upon an object that has been dropped the object will eventually reach terminal velocity (around 120 miles/hour) if the fall is from sufficient altitude (2,000 ft) and also otherwise uninterrupted. People surviving free fall At least three airmen have survived free falls of around 20,000ft without a parachute in the Second World War; Lt. I.M. Chisov was a Russian bomber, Sgt. Alan Magee an American gunner on a B-17, and Sgt. Nicholas Alkemade a British gunner on a Lancaster bomber. It is estimated that a person free falling horizontally, reaches a maximum velocity of around 120 mph after a fall of just 2,000ft, so the additional 18,000ft doesn't make these falls that much more dangerous, apart from the lack of oxygen at high altitude. All three men lost consciousness during their falls, and two of them landed on terrain covered in deep snow, which was probably a significant factor in the survivability of the falls. Vesna Vulović, a flight attendant from Yugoslavia, survived a fall from 10,160 m (33,330 ft) when the DC-9 airplane she was traveling in blew up over Czechoslovakia (now Czech Republic), on January 26, 1972. A terrorist bomb was thought to be the cause. Vesna broke both legs and was temporarily paralyzed from the waist down. No other passengers survived. http://www.guinnessworldrecords.com/content_pages/record.asp?recordid=43941 Stories about desperate Russians deploying paratroopers without parachutes (unsucessfully) during World War II are most likely fabricated. http://www.greenharbor.com/fffolder/questions.html#anchor1234559 References
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