Slower speed with low battery?

[fireship4]

I cant get above 2kts in my S-18 and my battery is below 25%. Is this a bug or not?

[leovampire]

Lust like a wind up toy as the spring unwind's the toy slow's down true to life and game effect you are experiencing.

The electirc engine's require a certain amount of base AMP's available to produce output. As the AMP's lower down so does speed. Voltage always remains constant it is the AMP's that produce power.

There are lead plate's inside of the plastic case of the battery with electro light acid inside of the battery. As the lead plate's start to sulfate due to lack of charge the AMP output of the battery start's to drop.

It was because of this sulfation that happens in the batteries that you ended up with a build up on the contact's and also fume's in the sub that could be ignited with a spark if you do not vent often enough on the surface. Also water had to be added when batteries are charging due to the acid being turned to gas so it would disapate.

Also batteries where usualy changed when you return to base seeing the lead plate's slowly degrade with them being drained down so far in charge and then recharged so much.

[fireship4]

Thanks Leo. Do you know at which % the output begins to degrade?

[AVGWarhawk]

If you are at flank speed on batteries, they will last about 1/2 hour. At two knots you can go all day. The batteries start to degrade as soon as you hit the big switch and use them.

[leovampire]

Originally Posted by fireship4

Thanks Leo. Do you know at which % the output begins to degrade?

Once you get below 50% the Amp's are getting low enough for the sub to start slowing down.

[PapaG39]

Leo...Best explaination I have run across so far...Thanks..

Couple of add on questions though..

On the Type IID and the VIIB/C subs, where would the break even point be between charging the batteries and quits charging.

I suppose it would be a RPM needed to make Knots...i.e. 2kts, 3kts, 4kts o.k. but RPM's required for 5 kts and you wouldn't get any more charge to the batteries...

Is there a point in normal battery discharge where you might not be able to recharge them with the regular on board generators?

[leovampire]

Originally Posted by PapaG39

Leo...Best explaination I have run across so far...Thanks..

Couple of add on questions though..

On the Type IID and the VIIB/C subs, where would the break even point be between charging the batteries and quits charging.

I suppose it would be a RPM needed to make Knots...i.e. 2kts, 3kts, 4kts o.k. but RPM's required for 5 kts and you wouldn't get any more charge to the batteries...

Is there a point in normal battery discharge where you might not be able to recharge them with the regular on board generators?

Once a battery is fully discharged in real life the amount of sulfation needed to get the batteries to hold a charge again is very high and breaks down the lead plate's at an extreamly high rate. This also means a large amount of water needs to be added to the batteries which lessen's the amount of lasting power the batteries would have in real life. I doubt sub's kept containers of Battery Electrolitic Acid around due to the fact it could and would eat it's way through thing's if spilled out.

Usualy an engine or 2 was disenguaged from the Sub's transmissions with a switch so that they could devote their power to recharging the batteries. Depending on how many on board deisels the sub had.

Plus the engine's also ran the hydrolic pump's in the sub to manuver the dive plane's and rudder's. And the generator's or the batteries depnding if surfaced or submerged ran the pump's to remove the bilge water build up.

Most 2 stroke diesel's were pushing their luck past 3000 RPM's.

I had a 2 stroke diesel engine from the 40's on an engine mount that I use to used for teaching purposes in basic Diesel engine design and operation. Usualy the 2 thing's that would break past 3000 RPM's was the mechanicl push rod's for the injector's or the drive shaft for the fuel pump. I was lucky and had an uncle who was a machinest and he would make me new one's.

[-Pv-]

When you graduate from your S boat to a fleet boat, the large loss of propulsion speed happens closer to 5% remaining charge. However this wasn't at full speed, but using 2 knots until the power dropped.
-Pv-

[Sailor Steve]

Originally Posted by leovampire

Lust like a wind up toy...

:rotfl:

I'm sorry, Leo; I know you have trouble with your typing. It's just that that's one of the funniest typos I've seen in a long time.

[leovampire]

Originally Posted by Sailor Steve

:rotfl:

I'm sorry, Leo; I know you have trouble with your typing. It's just that that's one of the funniest typos I've seen in a long time.

:rotfl: :rotfl: :rotfl:

OOOpp's .

Oh well at least I got an informative message out about how it work's in real life anyways.

[Snuffy]

I've seen them Lustful wind up toys ... I just never ventured near enough to one to get to know one on a personal level. :rotfl:

I very much enjoyed your discourse of battery/batteries 101! Much thanks!