Quote:
Originally Posted by TheDarkWraith
I can probably do something for this. I would make it so that a file is read that contains all the data for every sub. So take all the engine properties for every sub and copy them into a file. Add a header to each one like so [x] where x is the sub's classname from it's cfg file. Adjust the values to what you want and post a link to it.
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I am still collecting more information on the topic, but I am close to have a complete framework of it, and I plan to post in short time the cfg file suggested by you.
For a start, from a table at p. 21 of the
Cumulative Edition of the British interrogation reports, I got confirmation that the "misaligned" point in the graph posted at post #1665 (electric propulsion), is due to a mistyping. R.p.m. at
Langsame Fahrt were 112, and not 90, as wrongly reported in
this document.
The correct rpm/speed chart for type VIIC U-boats is therefore:
Code:
DIESEL
speed order rpm speed
========================================
Kleine Fahrt 161 6.10 kts
Langsame Fahrt 263 9.63 kts
Halbe Fahrt 310 10.98 kts
2x Halbe Fahrt 404 14.24 kts
Große Fahrt 469 16.73 kts
Äußerste Kraft 485 17.29 kts
ELECTRIC
speed order rpm speed
========================================
Kleine Fahrt 60 1.50 kts
Langsame Fahrt 112 3.00 kts
Halbe Fahrt 160 4.10 kts
2x Halbe Fahrt 200 5.23 kts
Große Fahrt 233 6.10 kts
Äußerste Kraft 280 7.40 kts
...and this is the new graph, showing a perfect rpm/speed linearity for both diesel and electric propulsion:
This is what British had measured on captured boats... the
Kriegsmarine manual for U-boat Type VII C (p. 14), reports slightly different figures:
Code:
DIESEL
speed order rpm max speed min speed
=========================================================
Kleine Fahrt 180 7.20 kts 7.00 kts
Langsame Fahrt 275 10.20 kts 10.00 kts
Halbe Fahrt 340 12.40 kts 12.00 kts
2x Halbe Fahrt 396 14.60 kts 14.00 kts
Große Fahrt 435 16.30 kts 16.00 kts
Äußerste Kraft 471 17.70 kts 17.50 kts
3x Äußerste Kraft 480 18.10 kts 17.90 kts
ELECTRIC
speed order rpm max speed min speed
=========================================================
Kleine Fahrt 55 2.30 kts 1.50 kts
Langsame Fahrt 110 4.50 kts 3.00 kts
Halbe Fahrt 160 6.30 kts 4.50 kts
2x Halbe Fahrt 215 8.20 kts 6.00 kts
Große Fahrt 250 9.30 kts 7.00 kts
Äußerste Kraft 285 10.5 kts 8.00 kts
3x Äußerste Kraft 300 11.00 kts -
Their graph is a bit more confusing:
Max speed points for both diesel and electric propulsion are substantially aligned on the same straight line, wereas min speed values can be interpolated by two lines whose gradients are similar to the ones seen in the previous graph, with electric propulsion having a lesser slope than diesel propulsion (0.0262-0.0280 vs. 0.0357-0.0366). This makes me to think that the max speeds reported for each speed order are sort of theoretical values. What do you think guys?
