I know your motto is "Aiming to Please", but since we all got S3D, why not give her a range you find believable?! :hmmm:

Personally I would trim her for a trip like Germany/France - Cape - Madagascar - Cape - Bordeaux...
That's 32000 km in game ~ 18000 miles plus some = 20000 miles :D

Yeah. That's true. I'll set it at one of three idea's floating around in my head on what i think it should be. I Just need to test that in game before i commit to any one of them.


Fuel is something of a "weakness" of mine. When it comes to fuel, i can put the most contentious rivet counter to shame, and i'll over analize it tell the cows come home. Any other technical topic, and I'm nowhere near as anal.

Hmmmm.......... I've played the "Evacuation" mission several times (starting from Batavia), running at about 11-12 knots and I've burned a LOT more fuel than 30% by the time I've reached Denmark Strait, more like 50+%. To be as economical as possible, I hardly run submerged up to that point, only diving for about 3 hours whenever I get a warning about radar transmissions being picked up. The approach to Denmark Strait is where it becomes tricky, though. Since the SH4 IXD2 doesn't have a Schnorchel, I run at flank speed to cover as much ground as possible on the surface before I'm actually spotted, then as deep as possible at silent speed until battery or CO2 force me to surface, then flank again on the surface for as long as possible, or battery is recharged (whichever comes first). So far I've only managed to reach Trondheim once (only to be well and truly clobbered on the final stretch to Bergen :wah:), but still had over 10% fuel remaining when I reached Trondheim.
By 1945 refuelling at sea would have been almost impossible, but U-181 could have reached Bergen without refuelling, otherwise she would not have tried to return to European waters.
Using 10% of the fuel to reach the Cape area might be realistic- what speed were you running at, what route? I think the IXD2's most economical speed may be around 8 knots, but unfortunately I can't calculate it without knowing how much the auxiliary load is.

Well it is another thing the devs didn't research.
 

This is what I found regards the Type IXD2, the source seems very reliable.

I checked the sim file and you are totally right since it got the right speeds but the wrong ranges, since it gives it a max surface range of 23700 @ 10 knots and 57 submerged @ 4 knots and they aren't within specs. To be honest, I do not play much with the IX2D so I didn't even notice it so if I would like it to be as realistic as possible then I will surely alter the file.

http://www.subsim.com/radioroom/albu...pictureid=3587

And while you are into it, check this site, there is useful info regards the engines used by american subs.

http://www.subvetpaul.com/Engines.htm