Battery charging is spot on!!!

[pocatellodave]

I have been having a hard time with fuel conservation,but I'm doing much better now thank to a lot of help from other skippers.I use the Strict range mod,and this gives me nine knots at ahead standard,and it is the most efficient speed for mileage.I try to stay on the surface as much as possible,with battery charging off when applicable.My greatest wish would be that we skippers could determine the number of engines we wished to run on,and charge batteries.I'm pretty sure I read where skippers would run on only one engine to conserve fuel.Please someone correct me if I'm wrong.I know running with two engines for propulsion,and charging with two was S.O.P.Maybe a mod like I mentioned isn't out of the question.I thank all the people that gave me a hand with using fuel more frugally.
Pocatellodave

[Tom C]

In order to charge batteries the alternating current would have to be converted to direct current ...

I read somewhere, FleetSubmarine.com I think, some comments suggesting that WWII diesel-electric surface ships had DC/AC converters but submarines did not, all-DC. Does anybody know for certain?

[Sailor Steve]

This would indicate that the motors and generators were all DC.
http://www.maritime.org/fleetsub/elect/chap1.htm#1F

[SteamWake]

Originally Posted by Sailor Steve

This would indicate that the motors and generators were all DC.
http://www.maritime.org/fleetsub/elect/chap1.htm#1F

Oh goody I get to give Steve a hard time :p

No such thing as a DC generator the windings output either a pulsing dc current (0 to +) or an alternating current (- to +). Then that is 'recitfied' to DC.

But technically you are correct it was called a DC generator.

http://farside.ph.utexas.edu/teachin...es/node91.html

Take a look at the sign wave at the bottom its a pulsing dc current. But then again the batteries dont care if its pulsing or not. As long as the pulse is always positive. A negative pulse would be a very very bad thing indeed. Ever seen what happens when someone trys to jump start a car and gets the leads reversed ? Lets just hope your no where close.

The amount of stored energy in a lead acid battery is really quite amazing.

[-Pv-]

Regardless of the theory, the slower you travel on the surface, the faster the recharge time in the game.

Here's the results I made and posted using patch 1.2 in April:

Endurance test results.

Installed game had no diesel, power, battery, or crew mods. No mods to any submarine model or components.

Platforms:
(I) 1942 Porpoise leaving Midway using a saved game on my 3rd patrol. I've been carefully building up my crew skill (assuming those graphs and numbers aren't totally meaningless.)
Eng Room Crew Efficiencies- I=.93, II=.94, III=.98
Weather: 5m/s dir 44
Sub Heading 250

(II) 1944 Balao Leaving Midway using one of the default patrol missions.
Eng Room Crew Efficiencies- I=.88, II=.88, III.88
Weather: 5m/s dir 0
Sub Heading 270

Procedure:
On Surface set depth to 70 ft 1/3 speed "Ahead Slow" 11 knots.
Passing 50 ft set speed to 1/3.
Upon reaching 70 ft, mark the time, mark the map, and set speed 2 knots (both text and voice confirm 2 knots.)
Cruise at set depth/speed using 1024 TC until battery reaches 2% or Oxygen warning of 95% CO2 (whichever comes first.)

Results using Porpoise:
2% batt, 95% CO2 = 76.95nm, 48 hours

Results using Balao:
4% batt, 95% CO2 = 91.4nm, 48 hours
Continued until battery reached 3% and 98% CO2 (Crew death at 99% CO2)
Distance = 95.1nm

Procedure for battery charge time:
Surfaced at battery depletion times described above. Mark time from charge lcon changing to bright until icon changes to dark automatically.

Recharge times:
Porpoise- Speed set to 1/3 on surface = :49 min
Porpoise- Seed set to Full on surface = 2hr:47 min

Balao (based on 4%Batt/95%CO2)
Speed set to 1/3 = 1hr:16 min
Speed set to full = 2hr:18 min

Ran same tests using Silent Running. No difference. This setting apprently only affects noise/detection/repair and does not affect CO2 generation or machinery/power savings.

-Pv-

[SteamWake]

Good research. Have you compared it to 1.3 ?

Also is this a 'vanilla' install ?

It still seems counter intuitive that the slower you run the faster your battery charges.

[tater]

The sub is propelled by electric motors. They take power. The power can come from the batteries or the generator directly.

Any power made by running a generator (a diesel engine) that is NOT used by the screws is available to be put into the batteries for later use.

[Sailor Steve]

Originally Posted by SteamWake

Oh goody I get to give Steve a hard time :p

No such thing as a DC generator the windings output either a pulsing dc current (0 to +) or an alternating current (- to +). Then that is 'recitfied' to DC.

I just looked at the manual. What I know and understand about generators and electricity would fill a book - a matchbook.:rotfl:

[SteamWake]

Originally Posted by Sailor Steve

I just looked at the manual. What I know and understand about generators and electricity would fill a book - a matchbook.:rotfl:

Heh... I just had to jump at the chance cause you are the one usually setting me straight

All in good fun