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#1
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An amphibian that sank?
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 |
#2
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An amphibian that sank?
"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! Doesn't seem any stranger than a boat sinking. I believe they're designed to float as well. |
#3
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An amphibian that sank?
"Steven P. McNicoll" wrote in message
ink.net... Doesn't seem any stranger than a boat sinking. I believe they're designed to float as well. These days, smaller boats often have flotation chambers filled with a closed cell type foam (e.g. styrofoam) so that in the even that they are filled with water, they might still remain on the surface, dependent upon what else might be loaded in the boat... It wasn't always that way though... I've helped recover sunken boats before that sank after hitting logs and such and knocking holes in their bottom... Larger boats aren't required to have this sort of positive flotation though... Don't remember exactly at what length the requirement no longer applies... Probably around 25-30 ft or so, I guess... It's quite possible that amphibs don't have this sort of design in them... |
#4
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An amphibian that sank?
In article ,
"Grumman-581" wrote: "Steven P. McNicoll" wrote in message ink.net... Doesn't seem any stranger than a boat sinking. I believe they're designed to float as well. These days, smaller boats often have flotation chambers filled with a closed cell type foam (e.g. styrofoam) so that in the even that they are filled with water, they might still remain on the surface, dependent upon what else might be loaded in the boat... It wasn't always that way though... I've helped recover sunken boats before that sank after hitting logs and such and knocking holes in their bottom... Larger boats aren't required to have this sort of positive flotation though... Don't remember exactly at what length the requirement no longer applies... Probably around 25-30 ft or so, I guess... It's quite possible that amphibs don't have this sort of design in them... *23.751***Main float buoyancy. (a) Each main float must have‹ (1) A buoyancy of 80 percent in excess of the buoyancy required by that float to support its portion of the maximum weight of the seaplane or amphibian in fresh water; and (2) Enough watertight compartments to provide reasonable assurance that the seaplane or amphibian will stay afloat without capsizing if any two compartments of any main float are flooded. (b) Each main float must contain at least four watertight compartments approximately equal in volume. |
#5
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An amphibian that sank?
"Roy Smith" wrote in message
... 23.751 Main float buoyancy. (a) Each main float must have (1) A buoyancy of 80 percent in excess of the buoyancy required by that float to support its portion of the maximum weight of the seaplane or amphibian in fresh water; and (2) Enough watertight compartments to provide reasonable assurance that the seaplane or amphibian will stay afloat without capsizing if any two compartments of any main float are flooded. (b) Each main float must contain at least four watertight compartments approximately equal in volume. I don't see anything in there that would require the supposedly watertight compartments to still provide floatation in the event of them no longer being watertight... On a side note, I've heard that for emergency floats on offshore (oil rig) helicopters, they often end up with the floats on the surface and the helicopter suspended underneath it in the water.. |
#6
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An amphibian that sank?
In article ,
"Grumman-581" wrote: On a side note, I've heard that for emergency floats on offshore (oil rig) helicopters, they often end up with the floats on the surface and the helicopter suspended underneath it in the water.. 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. |
#7
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An amphibian that sank?
"Grumman-581" wrote in message
... "Roy Smith" wrote in message ... 23.751 Main float buoyancy. (a) Each main float must have [...] I don't see anything in there that would require the supposedly watertight compartments to still provide floatation in the event of them no longer being watertight... There's not. However, I have heard of seaplane owners who have done things like fill their wings (or other easily accessed compartments) with ping-pong balls, for this purpose. Generally speaking though, seaplanes don't have any filler material, such as styrofoam or what have you the way boats do. I think it's likely that this is because, as light as styrofoam is, when you fill every empty space of an airplane with it, that's still useful load you lose. Of course, there are also the certification and maintenance issues as well. The bottom line is, I believe, that it's much simpler to put a bunch of lightweight filler material in a boat than in an airplane. Pete |
#8
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An amphibian that sank?
"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 |
#9
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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 ) |
#10
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An amphibian that sank?
"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! It broke the law . . . . Law of gravity (and the law won) |
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