Solution for real battery charging/life in TWOS

[finchOU]

I'm all for Mods that increase realism. So can you explain why the change so we are all on the same page? Is there a reason the Battery drains faster in SH5 then in real life? Sell me on it.

[gezahu]

Originally Posted by finchOU

I'm all for Mods that increase realism. So can you explain why the change so we are all on the same page? Is there a reason the Battery drains faster in SH5 then in real life? Sell me on it.

The stock game is way off.

Submerged range is for sure:

https://en.wikipedia.org/wiki/German_Type_VII_submarine

150-170km at 4 knots (with my tweaks it is 160), not upgraded motorman in TWOS gives some 80km with 10+ hours recharge, upgraded motorman gives 110 with some 12+ hours of charge (i tested it cant remember the point is that is is too way off).

For the recharge time I could only find data for similar submarines (british) the 8-9 hours.

On page 133 of this book:
http://www.uboatarchive.net/Manual/Manual.htm

The ampers are given and a smarter guy then me calculated the recharge time from the capacity of the batteries and the charge ampers or power. His numbers are: 7-78 hours fast charge and 11.67 hours normal charge. Here:

http://www.subsim.com/radioroom/show...postcount=7870

From operational perspective being able to cruise a full day (16 hours at 4 knots) than fully recharge at night (in 8 hours) makes a perfect sense.

[gezahu]

Here is the math behind:

http://www.subsim.com/radioroom/show...postcount=7896

To work out the recharge time use formula Ah / Amp = time.

therefore assuming that your craft is travelling at 'Slow Ahead' using the information above the battery has a rating of 9160Ah, as the information states the charging is done in 3 phases, so for phase 1 the battery is charged at 1650 Amp.

9160Ah/3=3053.333

3053.333Ah/ 1650Amp=1.85 Hours

for phase 2 the amps are slowly reduced from 1650Amp to 415Amp giving an average of 1650-415=1235Amp

3053.333Ah/ 1235Amp=2.47 Hours

phase 3 3053.333Ah/ 415Amp=7.35 Hours

giving a total for normal charging off 1.85+2.47+7.35=11.67 Hours

for a 'Fast charge' the information states that it reduces the time by 1/3

11.67/3=3.89
giving a 'fast charge' time of 11.67-3.89=7.78Hours.

These figures are only an approximation as recharge systems do not work at 100% efficiency today never mind 80 years ago! you could probably add another 20% - 40% to these figures.

Les

[vdr1981]

What I would like to "hit" is 150-160km/4kn with recharge time from 5% to 100% 10-12h.
Do you have any suggestion for range values in sim file?

[gezahu]

Originally Posted by vdr1981

What I would like to "hit" is 150-160km/4kn with recharge time from 5% to 100% 10-12h.
Do you have any suggestion for range values in sim file?

I dont think 10+ hours is hystorically accurate. With fast recharge it should be little less that 8 hours. My tweaks are now about right for 10 hours but I would go for less.
But if you want to increase recharge time go for significanly more range like 40-70 miles if it increases range go down with speed 0.1-0.2, so like 50 or 70nm / 2.4-2.3knots would be your pick.