Hull Speed: 28 knots
Top Speed: 45 knots
Posted on 10/24/2020 8:49:21 AM PDT by SeekAndFind
Two things a submariner won’t tell you: how fast his sub can go and its crush depth.
The speed of a displacement ship such as this destroyer is limited by it’s speed length ratio (SLR). The hull design engineers create a hull form to mimic a longer hull.
If sufficient power is applied to make a vessel rise on plane then the S/L ration does not limit the speed.
A high powered tug with power way beyond it’s S/L ratio will not go up on a plane because of it’s hull design and may well actually go slower at full power due to the enormous waves created.
“Displacement vessels (ships, sailboats) are limited in speed by the length of their water line”
Horsepower can overcome this ‘limit’.
I was counting on a correction since that was only a layman’s guess.
“how fast can a nuclear sub go”
Copy and google it.
Only 80 VLS tubes.
A new Burke DDG has at least 96, comes in at 10,000 tons and is proven.
The Zumwalt was intended as an R&D platform.
Look for learnings to be added to the planned Large Surface Combatant.
In the mean time we’ll keep building the Burke Flight IIIa. And a bunch are funded.
Looks like the Obama/Biden DOD did what they consider to be an effective job on the Zumwalt.
Their Chinese/Russian/Iranian masters are very pleased with what their money has bought.
No, horse power can’t on a displacement vessel. At least not without sinking.
Ooops, times like this is when I wish we had a delete. You are correct about hp and hull speed. I mis remembered what I was taught many years ago. Oh well.
Hull Speed: 28 knots
Top Speed: 45 knots
Fantasque!
Funny, part of the ship in some views looks cartoonish.
Got any ammo for that fancy gun yet?
I’ve heard nuclear aircraft carriers can top out at about 60 mph. Crazy if true.
Chunk the 155s overboard and slot in some smaller, proven 5” guns. Or figure out if some army 155s can be made salt water resistant at a reasonable cost (probably not).
Submarines used to submerge with exposed 4 and 5 inch guns with no issue. Some US subs even had 6’ (152 mm) deck guns. Japanese used 5.5 inch guns (140 mm) on their subs. Conditions on the Zums can’t be any worse.
The problem doesn’t really seem so hard to solve. Someone didn’t want a solution.
I’ve heard stories the old Enterprise CVN-65 could flat out leave anything afloat in its wake she was so fast.
I believe that as they go faster, they begin to pitch down at the bow., increasing drag.
When I have built failures I don’t get paid. Why have we paid for this if it doesn’t work?
It depends on whether they are in hard water or soft water.
Assuming you mean supercavitation then it's been used on torpedoes and there have been tests done on larger underwater craft. Problem with it is that it's noisy. A submarine using supercavitation would be instantly detectable by any sonar system for hundreds of miles and the noise it generates would blind its own sonar.
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