SUBSIM Radio Room Forums - View Single Post - No speed gain after stopping battery recharge

TorpX · 12-01-15, 01:43 AM

I was testing my mod set-up, to make sure everything was kosher, and did a little test with the battery charging speed.

class ____________ max. speed __________ w/ battery charge
S-18 ____________ 13.5 kn. ______________ 10.5 kn.
S-42 ____________ 12.75 ________________ 10.0
Porpoise _________ 20.0 _________________ 19.25 to 19.5 *
Gato ____________ 21.5 _________________ 20.5 to 20.75 *

* batteries charged at very slow rate

The speed for the battery charge was checked at 50% battery capacity, and again at 90%. That is why there are two figures for the diesel-electric boats. Note that while going at flank speed, charging was very slow for these boats (as we would expect). I tried the Gato at 1/3, and it seemed that charging didn't reduce that speed (as it shouldn't). This may explain the confusion over the matter.

The difference between 20 and 19.5, or between 21.5 and 20.75 may seem trivial, but it takes 8 times the power to obtain 2 times the speed, so the difference is greater than it appears at first glance.

12-01-15, 01:43 AM	#6
TorpX Silent Hunter Join Date: Sep 2010 Posts: 3,975 Downloads: 153 Uploads: 11	I was testing my mod set-up, to make sure everything was kosher, and did a little test with the battery charging speed. class ____________ max. speed __________ w/ battery charge S-18 ____________ 13.5 kn. ______________ 10.5 kn. S-42 ____________ 12.75 ________________ 10.0 Porpoise _________ 20.0 _________________ 19.25 to 19.5 * Gato ____________ 21.5 _________________ 20.5 to 20.75 * * batteries charged at very slow rate The speed for the battery charge was checked at 50% battery capacity, and again at 90%. That is why there are two figures for the diesel-electric boats. Note that while going at flank speed, charging was very slow for these boats (as we would expect). I tried the Gato at 1/3, and it seemed that charging didn't reduce that speed (as it shouldn't). This may explain the confusion over the matter. The difference between 20 and 19.5, or between 21.5 and 20.75 may seem trivial, but it takes 8 times the power to obtain 2 times the speed, so the difference is greater than it appears at first glance.