Okay - given the discussions here, I think I'm going to have to try planning out the "Phin torpedo destroyer" - or, to put it another way, Von Orca's U-Boat.
The aim is to pretty much try to recreate something that looks and acts like a WWII U-Boat as a traveller warship, with suitable modifications for amphibious operations and its uplifted dolphin crew.
a few back of fag-packet calculations to start off.
Anyone with advice is welcome to chime in.
First off - size.
Now a ship's displacement in tonnes is not, as has been pointed out, the same as its dTon value. However, for a submarine rather than a surface ship, we do have the submerged displacement value - which is a true measure of the volume of the ship.
For a Mark VII, that's 871 tonnes of water.
Which is 871 cubic metres of water - i.e. a volume of 871 cubic metres. Which at 14 cubic metres per tonne of hydrogen means about 62 dTons.
That's really small! Am I doing that wrong somehow?
....No, I don't think I am. 50 metre length x 4 metre width x 4 metre draft is 800 cubic metres in the bulk of the hull.
...Right. Biiiiiiiiger ship needed, I feel. May just arbitrarily go for a 500 dTon or something. That's the equivalent of 7,000 tonnes submerged displacement, or a modern attack sub.
A single bay for main armament and a 'deck gun' is, I suspect, all I'm getting!
I'm thinking that the 'torpedo tube' will be lobbing ortillery torpedoes - I know they're less effective (easier to shoot down, less accurate, etc, etc) but that's sort of the point - I want the players to see a merchant ship take a torpedo or two and receive triple hits from them - cries after the fashion of "point defence! In the name of god, point defence!" mean it's going correctly....
The aim is to pretty much try to recreate something that looks and acts like a WWII U-Boat as a traveller warship, with suitable modifications for amphibious operations and its uplifted dolphin crew.
a few back of fag-packet calculations to start off.
Anyone with advice is welcome to chime in.
First off - size.
Now a ship's displacement in tonnes is not, as has been pointed out, the same as its dTon value. However, for a submarine rather than a surface ship, we do have the submerged displacement value - which is a true measure of the volume of the ship.
For a Mark VII, that's 871 tonnes of water.
Which is 871 cubic metres of water - i.e. a volume of 871 cubic metres. Which at 14 cubic metres per tonne of hydrogen means about 62 dTons.
That's really small! Am I doing that wrong somehow?
....No, I don't think I am. 50 metre length x 4 metre width x 4 metre draft is 800 cubic metres in the bulk of the hull.
...Right. Biiiiiiiiger ship needed, I feel. May just arbitrarily go for a 500 dTon or something. That's the equivalent of 7,000 tonnes submerged displacement, or a modern attack sub.
A single bay for main armament and a 'deck gun' is, I suspect, all I'm getting!
I'm thinking that the 'torpedo tube' will be lobbing ortillery torpedoes - I know they're less effective (easier to shoot down, less accurate, etc, etc) but that's sort of the point - I want the players to see a merchant ship take a torpedo or two and receive triple hits from them - cries after the fashion of "point defence! In the name of god, point defence!" mean it's going correctly....
