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#41
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An amphibian that sank?
"Chris W" wrote Didn't the "Myth Busters" sink a boat and try to float it again by filling it with ping-pong balls? If I remember right something on the boat broke, and all the ping-pong balls spilled out. Yep, a hatch gave way, but they screwed a piece of plywood on it, and then brought to the surface. -- Jim in NC |
#42
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An amphibian that sank?
Flyingmonk wrote:
http://www.divingservices.net/aircraft.jpg http://www.divingservices.net/9bcess2.jpg Anyone have the story behind this? Strange that a plane designed to float, sank! The Monk So was the Titanic! ;-) |
#43
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An amphibian that sank?
"Dudley Henriques" wrote in message link.net... "Flyingmonk" wrote in message ups.com... http://www.divingservices.net/aircraft.jpg http://www.divingservices.net/9bcess2.jpg Anyone have the story behind this? Strange that a plane designed to float, sank! The Monk I could be wrong, but wasn't the Titanic designed to float? :-) DH As I recall it even had lots of watertight compartments designed so that you could flood several of them and the Titanic would still float. Unsinkable, they called it. After it sank, the Unsinkable title was transferred to Molly Brown of Denver. :-) Highflyer Highflight Aviation Services Pinckneyville Airport ( PJY ) |
#44
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An amphibian that sank?
In article ,
John Kimmel wrote: Roy Smith wrote: One of the fundamental truths of boat design is that the center of gravity has to be lower than the center of bouyancy. If it's not, then eventually the boat (helicopter, whatever) will figure out how to turn itself over so that it is. Absolutly wrong. Beg to differ. The only _truly_stable_ geometry is 'heavy side down, light side up'. One _can_ design craft with a secondary, 'meta-stable', mode that is 'heavy side up'. one of the simplest examples of which is a catamaran. The center of bouyancy of most large boats and ships is well below the center of gravity. Which is why most large boats and ships, *when*sufficiently*provoked*, _will_ turn turtle. The proof that the 'normal' mode of such craft is _not_ stable is shown by the fact that there is a far larger range of 'roll attitude' from which the ship will go 'bottom up', than there is where it will return upright. And, once a ship _does_ go over, it is very, *VERY* difficult to get it back upright. Anybody who has sailed a small sailboat is well aware of this; it is all too easy to tip it over, and *way* more difficult to get it back upright. |
#45
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An amphibian that sank?
In article ,
Ron Wanttaja wrote: On 23 Apr 2006 13:56:44 -0700, "Flyingmonk" wrote: Anyone have the story behind this? Strange that a plane designed to float, sank! Friend of mine had built an Osprey II amphibian and planned to make its first flight from the water instead of land. He took it down the seaplane ramp for water-taxi testing. A few minutes after hitting the lake, he noticed water sloshing around on the bottom of plane. When he'd gone down the seaplane ramp, the nose of the plane had pitch up when it hit the water, ramming the tail skid into the fuselage and leaving a bit of a large hole. He poured on the power to go back to the ramp. When he got close, he cut power and flipped the Armstrong gear lever. But when the gear hit the ramp, the mains collapsed. Turns out the primary landing gear torque tube had been undersized (design error). My buddy paid for a forklift to carry his plane back to the hangar. There, he set the bottle jack under the wing to jack the plane up so that he could lower the gear back down. The jack slipped, punching a hole in the bottom of the wing. A clear-cut example of O'Brien's Law at work! |
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