I’m having trouble coming up with a good design for a battery holder in my Bismarck. I’ve built a couple designs out of wood and ABS but was never really happy with either. does anyone have a design they really like?
sorry. Should have specified. I have lots of room in the boat. I’m using two 6000mAh Goldedt LiPo batteries.
Lets take a look at tomorrow's build session and figure something out. I'll bring a few examples of what I've used in other ships, and discuss what I'm planning for my I-boat and VDT.
Sounds good. I am printing out a couple of the same battery holders from the Lutzow (a little bigger) as a fail safe/option.
hahaha!!! I’m embarrassed. I should be ashamed of myself. seriously though? 12000mah is not enough? I calculated (estimated) that they should last me 30 minutes of hard fighting. That might not cut it for NATS but up here 30 minutes for two sorties is reasonable. what should I be looking for? In my first Bismarck, I had two lead acid batteries that were 6v. I could battle all day on those babies. In my current Bis I have all brushless motors and ESCs. I didn't think I could go with lead acid again because of that. BUT! I would prefer the lead acids for the weight or something like it
Thats about enough for Indiana to run for 8~ minutes if I'm fighting hard. Generally I recommend (at 3s) 2 5200 packs for a cruiser/small BC, and general rule of thumb is 2 batteries per pump. So Indiana carries 6, sometimes 8, 5200mah lipos. JB3 takes 8. Thats 40ah in the boat @ 3s.
Yes, basically. That *should* last an entire battle. Better to have surplus battery than lead ballast.
Yes. In our hobby, almost not important. So long as its above 20~ you're fine. In the RC car world, you'll puff packs overdrawing them with crazy powerful brushless drives in heavy cars.
Can you mix Mah batteries? For example, can I put two 6000s with 2 5200s in the same system. Or is that a boom boom scenario?
Short answer, you're not supposed to mix mAh and/or C-ratings within the same circuit. Long answer, it comes down to load sharing. Different batteries have different internal resistance, which affects the proportional load that each battery will carry. This is roughly indicated by the battery's C-rating. If you have different C-ratings, the higher-C batteries will deplete before the lower-C batteries. Theoretically you could use different mAh batteries, as long as they are properly matched so they carry the proper proportion of load and they all deplete at the same time. The really high-end batteries for competitive racing are "matched cells", meaning each cell within the battery has been tested to have virtually identical capacity and cell resistance. That said, as long as you're not mixing wildly different battery capacities/C-ratings and you're not fully draining them in minutes, it's probably OK. If you are really concerned, just run them on separate circuits. Use the 5200's to power your drive and the 6000's to power your pump.
I am not married to the 6000s/55c. They are still good batteries and would like to get the full life out of them. My ideal scenario is to be able to use my 6000mah/55c batteries until they die and then switch to 5200mah/50c without having to change any of the wiring. I would get the 6000s again but I can't find them on Amazon anymore.
