Matrix Games Forums

In researching some ships I find some sources give the barrel capacity. Barrel to Ton conversion based upon the liquid. So looking for opinions as to what a Kentucky windage figure would be for liquids in game Here is some information I found:

At 86°F (30°C)
----------- Approximation -------------------
Liters Liters A.Gallons A.Barrels
Product per per per per
E.Ton M.Ton M.Ton M.Ton
-----------------------------------------------------------------
L.P.G 1,864 1,835 484.6 11.54
JP.4 1,355 1,333 352.4 8.39
Jet A-1 1,274 1,254 331.2 7.89
Premium 1,375 1,353 357.5 8.51
Regular 1,440 1,418 374.5 8.92
Kerosene 1,293 1,273 336.2 8.00
Gas Oil 1,197 1,177 311.2 7.41
Diesel Fuel 1,177 1,159 306.1 7.29
Fuel oil 80 CST 1,082 1,065 281.2 6.70
Fuel oil 180 CST 1,067 1,050 277.4 6.60
Fuel oil 230 CST 1,064 1,047 276.6 6.59
Fuel oil 280 CST 1,061 1,044 275.9 6.57
Bitumen 994 979 258.5 6.15


Hope the chart is readable. It's the last column that gives the barrels per ton. Does anybody know what the design team used.

That table is in our design notes, but I do not know exactly how the capacity of each tanker class was calculated. Fellow that does know is off sailing right now.

ORIGINAL: Buck Beach
In researching some ships I find some sources give the barrel capacity. Barrel to Ton conversion based upon the liquid. So looking for opinions as to what a Kentucky windage figure would be for liquids in game
<snip>
Does anybody know what the design team used.

Kentucky windage for liquids is ~ 85% of vessel DwT, or in many cases (not all) ~ 10 bbl/ton.

It all comes from the fact that the game uses tons, and not barrels. Barrel capacity is a bit of a misnomer because tankers very rarely (if ever) fill the tanks to the top. It’s a density thing and a lot like GRT – good advertising copy, but not particularly useful to them what’s in the biz. Here’s a T2-SE-A1 example.

T2-SE-A1 has a tank capacity of about 141,200 bbl. T2-SE-A1 has a total deadweight tonnage (DwT) of 16,720 t metric on a total displacement (Dspl) of 21,880t metric. 141,200 barrels of bunker C (about 110 CST, and therefore about 6.65 bbl/ton) weighs 21,233 tons, which is almost the entire ship displacement. Even 141,200 barrels of diesel weighs 19,369 tons, which is 3,000 tons beyond the total ship DwT. Clearly physically impossible.

To calculate capacity in tons (therefore not dependent on density), the exact solution is to subtract every incidental thing that goes into a raw, empty vessel (ship fuel, water (fresh and steaming), food, dunnage, crew, guns, ammo, booze, naughty pictures, etc..) from the total DwT in order to arrive at Net DwT (also called Cargo Deadweight). The majority of this is bunker fuel, and the nominal allowance for the other stuff is maybe 50% of bunker.

So for the game, the T2-SE-A capacity is 16,720 – (all that stuff) = 14,250 metric tons of liquid cargo. This translates into 94,760 bbl of bunker, 103,882 bbl of diesel, and about 126,800 bbl of 80 octane gasoline (and you can filler her to the brim, Jim, with naptha).

If you don’t want to do all that, a good swag is ~ 83-86% of DwT. If you can’t find DwT, another (but way less accurate) swag might be a bbl/ton of maybe 10. But note: this is ONLY good for tanker designed ships. Bulk designed ships have the same calculation rules but the percentages work out differently.

Hope this is useful.

Thank you JWE