Did my title bar always have a frame around it? I do not remember having one. Blogger sometimes does suspicious things like send comments which are time stamped 4:12pm…except I receive them at 4:04pm same date. I have some other long standing questions that I have asked many people only to meet a wall of vagueness, a moat of generalization, ideas made of steam, lacking substance. They seem like questions that should have simple straightforward answers yet experts cannot be found.
If submarines “blow” their tanks to submerge, where does the air come from to fill them up again when you want to surface?
Leading hypothesis (by me): They do not discharge the air but rather compress it and store it in tanks.
Holes: What about when you need to dive in a hurry…compressing the air would take time.
In Australia fence posts have holes through them for the wire to pass through, instead of being stapled to the side. How do they drag barbed wire through all the posts without it getting hung up?
Leading Hypothesis (by Big Daz): The barbs point slightly backwards, so they don’t get caught.
Holes: Stapling, which is common in NA, is still far easier and does the job. There must be more to it.
How do they put up tall construction cranes and take them down without another crane, and if they use another crane how do you put up that crane without still another crane?
Leading hypothesis (by Jutra): The crane raises itself on hydraulic legs and slips in a tower section. Then it lifts up again and puts in another section. Comes back down in reverse.
If submarines “blow” their tanks to submerge, where does the air come from to fill them up again when you want to surface?
Leading hypothesis (by me): They do not discharge the air but rather compress it and store it in tanks.
Holes: What about when you need to dive in a hurry…compressing the air would take time.
In Australia fence posts have holes through them for the wire to pass through, instead of being stapled to the side. How do they drag barbed wire through all the posts without it getting hung up?
Leading Hypothesis (by Big Daz): The barbs point slightly backwards, so they don’t get caught.
Holes: Stapling, which is common in NA, is still far easier and does the job. There must be more to it.
How do they put up tall construction cranes and take them down without another crane, and if they use another crane how do you put up that crane without still another crane?
Leading hypothesis (by Jutra): The crane raises itself on hydraulic legs and slips in a tower section. Then it lifts up again and puts in another section. Comes back down in reverse.
There are cranes nesting along the river which meets the sea at Vancouver. Would they be the Fraser Cranes?
5 comments:
I am sure they don`t NEED air to surface in a hurry, then they can grab a few more deep breaths and off to play again, the fence post question will take some thinking about , but does prompt me to ask why they need fences out there anyway? I know nothing about cranes despite watching "when cranes attack 2" twice.
It is very freaky that I was wondering the very same thing about cranes lately.
Why are you in my head? And is it cold in there?
146 and how do they float on the surface without air in the tanks?
No exo, it's quite nice. I like the curtains.
Thanks Jutra, that explains cranes - legs and sections makes sense.
When submarines "blow their tanks" to submerge they are really opening the valves to the ballasts and letting out air and letting in sea water.
When they resurface they use air from compressed air tanks running the length of the boat.
Once at the surface generators refill the compressed air tank/tanks.
To dive quickly, you just empty your ballasts of air faster and take in more water.
So, you were pretty much right on in your hypothesis.
Also you are right on about the cranes. They use a top climber/climbing frame to build the mast up. Basically it works just like you think it works. Hydraulics lift up the cab and jib and then the crane lifts up the new 20 ft. section, places it and you are good to go.
I love these "how does it work" type posts. I get to to some research.
thanks Tara, any answers for Big Daz (3 posts above this one)?
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