Doesn't matter. To control its buoyancy, a submarine has ballast tanks and trim tanks, that can be filled with either water or air. When the sub is afloat, the ballast tanks are filled with air and the sub's overall density is less than that of the surrounding water. As the sub dives, the...
Hi! Mike.
So we are in agreement then.
He has his figures wrong, I'm a little dubious about the dimensions as well as the Approx 80% volume of water removed.
He really needs to post the prints for the sub (with Dimensions) so that a controlled lift can be calculated.
I do this sort of recovery...
>(New PostMikeHalloran (Mechanical)
5 Oct 08 11:59
The hull with dimensions as given displaces 91.8 short tons of seawater, so just dewatering the hull is not going to lift it.)<
Then it isn't a submarine, it's an anchor.
If displacement < Gross tonnage, it never floated in the first place...
Can't figure out how to edit the URL's I've posted. I've altered the address on my website since
http://picasaweb.google.com/Marine.Civil.Engineer/MarineCivilEngineeringDiving#http://picasaweb.google.com/Marine.Civil.Engineer/MarineCivilEngineeringDiving#
I recently demolished 6 lock gates in South Wales. The Greenheart Heel and Mitre timbers, apart from a few scarfed areas, were in an almost new condition. The Gate Leaves had been constructed in 1914. the timbers had never been replaced.
The new proposed Hardwoods will have big shoes to step into.
Is there a practical reason why you cant remove all the water from inside the sub?? Less weight, more buoyancy, the more likely she will be to pull herself slowly off the bottom and rise gradually to surface. Although yes I could forsee a rapid rise if she let go suddenly.
20 feet at...
Further to my previous post.
1. Suction will not be a problem, you will have enough displacement/lift to overcome the small amount of suction.
2. A controlled lift can be managed through controlling the pumps from the compressor feeds at the ball valves.
3. Ensure that you have sufficient...
No problem. in the last 12 months I have raised 6 No 300 ton lock gates sunk and buried in silt. only 1/3 of the structures area above the silt. 1 gate leaf was in 30ft of water.
Use submersible air driven pumps (Ingersol are best), blank hatches with plate, fittings for air and discharge hoses...
