Alberich

[FIREWALL]

How many coated uboots survived the war without being sunk ?


I'll stick to , go deep, silent running, 1knt and 10 degrees port then starboard thank you.

Has worked everytime so far.

[Jimbuna]

Originally Posted by FIREWALL

Jim... Now you know why I pester "you" with questions.

I could care less what it's made of. Interested more on if it will protect my arse.

That bubble gum ain't cheap.

Well for what it's worth....I use it when it becomes available.

Provided I survive that long of course

[Jimbuna]

Originally Posted by Lt.Fillipidis

Hmm...
If the actual coating that was 4mm thick could reduce detection by 10% then, in theory, an 8mm coating would double the effect and a 40mm coating would cease all noise. Plus, reducing the blast force by depth charges.

Is this correct or i should go get some math sessions?

It doesn't work that way ingame I'm afraid.

Where in the files is 4mm used as a direct influence or indicator that the 10% efficiency saving is dependant on thickness?

The sensor parameters were tweaked to give an equivelant effect of a 10% reduction in the chances of detection under certain variable conditions.

Eg: Under test conditions an escort detects the U-boat at 400 metres....after file adjustments and under as near identical conditions as possible, the U-boat isn't detected until the escort is within approximately 350 metres.

[irish1958]

Again, after 3-5/1943 Hedgehogs, aircraft carriers, better and better radar, lots more ASW vessels, more bases including the Azores which closed the gap in the Atlantic sea lanes, intense pressure from superior officers,including Churchill and Roosevelt to stop the losses, reasoned tactics applied by experienced and talented naval officers, Admiral King getting his head out of his ass and finally understanding that the U-boats were a real problem and not just an irritation made sonar less and less important. The subs could be completely invisible to sonar and the losses would be about the same.
This, of course, would change with the nuclear subs that never needed to surface.

[Lt.Fillipidis]

Originally Posted by jimbuna

It doesn't work that way ingame I'm afraid.

Where in the files is 4mm used as a direct influence or indicator that the 10% efficiency saving is dependant on thickness?

The sensor parameters were tweaked to give an equivelant effect of a 10% reduction in the chances of detection under certain variable conditions.

Eg: Under test conditions an escort detects the U-boat at 400 metres....after file adjustments and under as near identical conditions as possible, the U-boat isn't detected until the escort is within approximately 350 metres.

Im talking about real life, Jimbuna.
Theoreticaly, the thicker the coating the less sound is reflected back to the sonar/made by uboat. But how about in practice?

[NoLine]

Alberich's purpose wasn't to make sub more silent, but to reduce or eliminate the return of the ASDIC signal

cheers
Noline

[Mittelwaechter]

AFAIR - all 11 coated U-Boats were sunk - but none with the help of ASDIC!

[Jimbuna]

Originally Posted by Lt.Fillipidis

Im talking about real life, Jimbuna.
Theoreticaly, the thicker the coating the less sound is reflected back to the sonar/made by uboat. But how about in practice?

Ah right...my mistake

[Friedl9te]

Originally Posted by Mittelwaechter

AFAIR - all 11 coated U-Boats were sunk - but none with the help of ASDIC!

U480 was not sunk by human action. It sunk after having contact with a seamine in a secret minefield.

It was never located by ASDIC !

[irish1958]

Originally Posted by Friedl9te

U480 was not sunk by human action. It sunk after having contact with a seamine in a secret minefield.

It was never located by ASDIC !

You are right; the stuff worked. The point is that it didn't make any difference for almost all U-boats. Something else killed them, and they had no way to escape.

[Jimbuna]

Originally Posted by Friedl9te

U480 was not sunk by human action. It sunk after having contact with a seamine in a secret minefield.

It was never located by ASDIC !

That is dependant on what reference source you believe and in your case U-boat.net for one:

http://uboat.net/boats/u480.htm

I have in my possession two other reference books which put her sinking down to depth charge attack by the RN frigates HMS Duckworth and Rowley of the 3rd Escort Group, shortly after she had attacked convoy BTC.78 and sank the Oriskany.

The hunt lasted 6 hours on 24-02-45 position (4955Nx0608W) 11 miles south-west of Lands End, sufficient wreckage was recovered for a 'kill' to be claimed.

An interesting one is this

[Friedl9te]

Well, the fate of many boats ist not yet clear. 64 years after the end of the war, history of some boats must be rewritten.
For instance U869
http://de.wikipedia.org/wiki/U_869

After the sinking of the ships in the canal by U480, tons of depth charges were thrown but these droppings were not targeted in any way.
This tactic was well known and should lead the commander to panic induced reactions, so to reveal his true position.
They knew that there had to be a boat but they did not know where it was.
In the documentation, which is worth seeing, the wrecked boat can be seen.
The damaga pattern looks more like direct detonation of a big mine close to the hull. To hit a boat with depth charges in that way must be a lucky punch. Whereas hedgehogs or similar weapons would never had destroyed the structure of a boat so severely.

[Jimbuna]

U-869 is the latest classic example on the subject.

I find it kinda interesting how different reference works fail to agree or contradict one another after over 60 years.

It makes one wonder how many mistakes have been made....we'll probably never find out.

[FIREWALL]

Originally Posted by irish1958

You are right; the stuff worked. The point is that it didn't make any difference for almost all U-boats. Something else killed them, and they had no way to escape.

The ones that survived had good Kpllt's.

That's why I don't use it .

[Ford Prefect]

There's only really one way to find out as to the effectiveness of the stuff. You need to restore a U boat, coat it up, put it out to sea and test it using period sonar. There's too much contradictory evidence in the history books on which to base any theory.