Good at math? I have a problem for you.

Ducimus · 01-06-07, 04:07 PM

It's all about FUEL! Im sure this will draw Letum like a magnent

One of the biggist mysteries to me, is exactly how much fuel is in a uboat, and.. the rate of consumption. But to boil the fat away, ive always wondered exactly how much fuel a trip to X destination would consume.

Awhile ago, i made this observation. Its a bit from Donitz's war diary:
(Picture linked cause it skews the page)
http://www.ducimus.net/sh3/BDU_on_Fuel.JPG

From this i make 4 assumptions:
1.) He's talking about Nautical Miles

2.) CBM means, Cubic Meters

3.) Hes noting how much fuel a uboat will have after making the trip To that area. Not how much they have to operate in that area, with the to and from trip already accounted for. (or do i have this backwards?)

4.) These are ballpark figures, not exact ones. We have no idea under what conditions or assumptions (if any) he made these calculations.

Now, according to this page:

http://www.uboataces.com/uboat-type-ix.shtml
A....
IXB has 165 Tons of fuel
IXC has 208 tons of fuel
IXC/40 has 214 tons of fuel.

So my thought is, to take BDU's estimate of how much fuel is remaining in the tanks after making a trip to X locaton, convert it to metric tons, and then convert that to a percentage against its total capcity?

What im having trouble with, is the density of the fuel, and finding an applicable formula to apply it too. And, i have to admit, mathimatics was never my most keen subject.

01-06-07, 04:07 PM	#1
Ducimus Rear Admiral Join Date: May 2005 Posts: 12,987 Downloads: 67 Uploads: 2	Good at math? I have a problem for you. It's all about FUEL! Im sure this will draw Letum like a magnent One of the biggist mysteries to me, is exactly how much fuel is in a uboat, and.. the rate of consumption. But to boil the fat away, ive always wondered exactly how much fuel a trip to X destination would consume. Awhile ago, i made this observation. Its a bit from Donitz's war diary: (Picture linked cause it skews the page) http://www.ducimus.net/sh3/BDU_on_Fuel.JPG From this i make 4 assumptions: 1.) He's talking about Nautical Miles 2.) CBM means, Cubic Meters 3.) Hes noting how much fuel a uboat will have after making the trip To that area. Not how much they have to operate in that area, with the to and from trip already accounted for. (or do i have this backwards?) 4.) These are ballpark figures, not exact ones. We have no idea under what conditions or assumptions (if any) he made these calculations. Now, according to this page: http://www.uboataces.com/uboat-type-ix.shtml A.... IXB has 165 Tons of fuel IXC has 208 tons of fuel IXC/40 has 214 tons of fuel. So my thought is, to take BDU's estimate of how much fuel is remaining in the tanks after making a trip to X locaton, convert it to metric tons, and then convert that to a percentage against its total capcity? What im having trouble with, is the density of the fuel, and finding an applicable formula to apply it too. And, i have to admit, mathimatics was never my most keen subject.