What am I missing?

[detox]

Lets see...Two 4s 5000mah packs paralleled to equal 10,000mah or Two 6s 5000mah packs paralleled to equal 10,000mah? My hull will not fit Two 6s 5000mah packs. So I will have to use Two 3s 5000mah packs ran in series to make 6s work in my hull (5000mah equals shorter run time). Which is best 4s2p 10,000mah or 6s1p 5000mah? Castle recommends using atleast 8500mah to guard against meltdown.

Has anyone ever tried charging/balancing a 6s pack? Chances are lots greater for a bad cell.

[Rumdog]

Who says your 6s packs have to be 5000 mah?

[Punisher 67]

Most volts I ever got was 600VAC and that left a healthy respect for voltage regardless of type . 4 years ago I crossed a + and - on a 12 cell system in my Apache , that vaporized the plug - Doug my moment of stupidity , everything was covered but the two that crossed , I am glad to have experianced that because from there on everything has a cover until the moment its plugged in . that is the only way to operate regardless of voltage weather it 4 cells or 14 cells .

[detox]

I try to keep everything simple and design all my boats around 4s. Lots of different batteries and connectors are a pain for me.

[BHChieftain]

Paul when I mention idiot its when a person plugs positive into the negative - a dead short done that way sorry I wasn't more specific - mishaps do happen thats why I am anal with the plug caps and when they come off .

Before I put my foot in my mouth I do agree the higher voltages are not for everyone - As mentioned before with my setups I take every precaution

I confess- I'm one of those idiots... dead shorted while wiring up a 4S2P config made out of 4x2S packs. Vaporised the connectors, luckily just a minor finger burn. Batteries were still ok (still have 'em today!)


Chief

[tiqueman]

Yes that is definitely a trend that is starting to catch on with some of the sport boaters , higher voltage with lower amp draw on lower KV motors - easier on hardware with more run time - sounds better everytime I hear it................

I started a thread on the whole 6s obsession thing a little while back, like Jay mentioned 6s does have it's place and is awesome for lower amp draw and extended runtime (if done properly), problem is most new guys grab a high KV motor and slap 6s in to which is just crazy. Like Darin also mentioned new guys don't want to experiment with props or strut adjustment at all. That's the fun for me, tinkering around to get it running as best as I know how. I recently find myself really liking 5s setups, just me. Typically less amp draw then 4s setups and not as $$$ as 6s setups i don't run my esc's at max voltage, so 6s is a HV esc for me and we all no how expensive they get. Happy medium in my world. Plus I just sport boat, so runtime is more important to me then speed. It's no fun recovering a boat every minute cause it flips. JMHO.

I will enter the fray, I am a sport boater and mostly run 4 or 5S on low Kv motors with a good quality ESC and a moderate prop as the largest hull I run is 33" long and I am a happy camper with this type of setup. The problem I perceive is that many sport boaters with RTR boats stick in high Kv motors with 6S power, cheap ESC and huge props and of course you all know what happens next......Racing is another matter and I respect these people who develop the sport and push the envelope. I just want to have fun and not spend a lot of cash replacing equipment.

Douggie

Punisher, in regards to your comment, as Dale and Douggie said, I see more the trend of the "newbs" coming and and recommending to everyone its a great idea to slap 6S to a 2200KV motor on a 180A esc and you will go 80mph. I havent seen many come in and say, "oh Im putting 6S in my Geico but puting a 1200KV motor in it." they do the opposite, because somewhere they read the motors can handle 60k rpm. And then throw a ridiculous size prop on it. As many have said, we will see how long it lasts... or will they ever tell?????? THATS the trend ive noticed lately.

[Diesel6401]

Punisher, in regards to your comment, as Dale and Douggie said, I see more the trend of the "newbs" coming and and recommending to everyone its a great idea to slap 6S to a 2200KV motor on a 180A esc and you will go 80mph. I havent seen many come in and say, "oh Im putting 6S in my Geico but puting a 1200KV motor in it." they do the opposite, because somewhere they read the motors can handle 60k rpm. And then throw a ridiculous size prop on it. As many have said, we will see how long it lasts... or will they ever tell?????? THATS the trend ive noticed lately.

That's a good point, and to save face (and embarassment) I doubt they will tell. Seem to me that new guys (i was there once) are all about speed chasing. The speed # is more important then a reliable setup, and sharing that information to new boaters is what is frustrating to me. It's like people continue to try and re-invent the wheel, no matter how many times you tell someone that there setup is not reliable it's the same arguement (my temps are low and my boat is running fine) do they actually know there temps, typically not and the answer is normally something like (i can stick my hand on it for 10 seconds) do they know there actual amps? No, but that doesn't matter cause they can stick there hands on the esc and motor for 10 seconds. I am not trying to jump all over new guys at all,I was in the same position and did the same exact thinking, but it cost me some extra $$$ that I didn't need to spend until the lightbulb went off. We have all made mistakes, and sharing those mistakes is what's important. Also lying about speed/setups ect, is only fooling yourself.

" A wise man learns by the mistakes of others, a fool by his own"

[Rumdog]

Yup. Most of these new guys come over from cars, where running 3 and 6s is popular. Since they already have those packs, they figure.. hey, I'll use these in my boat too. more voltage and higher kv equals more fast, right? I've been involved in countles discussions with new guys telling them it's not a good idea and why.
They think I'm full of it for the most part. At this point, I give up on trying to help them. Generally they accuse me of being jealous of their super fast rtr rig.

[Punisher 67]

Punisher, in regards to your comment, as Dale and Douggie said, I see more the trend of the "newbs" coming and and recommending to everyone its a great idea to slap 6S to a 2200KV motor on a 180A esc and you will go 80mph. I havent seen many come in and say, "oh Im putting 6S in my Geico but puting a 1200KV motor in it." they do the opposite, because somewhere they read the motors can handle 60k rpm. And then throw a ridiculous size prop on it. As many have said, we will see how long it lasts... or will they ever tell?????? THATS the trend ive noticed lately.

I agree with you 100% on that being a stupid direction to go , what I am referring to is if someone takes that 4 cell 2200 kv motor out and replaces it with a 6 cell 1500kv motor to gain run time . That done properly will extend your runtime at the same speed . what you guys are referring to will happen and there is nothing you can do to stop it - We watched that same scenario done last summer but with a apparition and the end result was a blown esc and motor - can't say we didn't warn our friend either of the potential consequences


.........

[Diesel6401]

Yup. Most of these new guys come over from cars, where running 3 and 6s is popular. Since they already have those packs, they figure.. hey, I'll use these in my boat too. more voltage and higher kv equals more fast, right? I've been involved in countles discussions with new guys telling them it's not a good idea and why.
They think I'm full of it for the most part. At this point, I give up on trying to help them. Generally they accuse me of being jealous of their super fast rtr rig.

That's where the idea of running 6s on CC1515 2200kv comes from. It's OK in my erevo, that means it's ok in my boat..

When I went to the LHS to attempt to start racing cars I was amazed by the setups. I'm not a smart car guy, by some of the guys motor temps where 180F+ by the end of the race and I know that's not good...

[crash440]

I was wondering if gettting hurt from a battery is a safty thing then why has it not been addressed? It seems to me the battery people or the pros would come up with some type of a inline fuse that would pop if shorted out. Everything in your house or a car for that matter has fuses why not rc boat cars trucks etc?

[Diesel6401]

I was wondering if gettting hurt from a battery is a safty thing then why has it not been addressed? It seems to me the battery people or the pros would come up with some type of a inline fuse that would pop if shorted out. Everything in your house or a car for that matter has fuses why not rc boat cars trucks etc?

The reason this happens is most experienced boaters use bullet connectors which make it extremely easy to dead/direct short the battery to itself, but it allows you to make/wire different setups without adding any harness's, it also allows you to use larger bullets as most connector don't get that large and/or can't handle the increased amperage. If it is a setup in which a ec5 or (god forbid) deans connector can be used, the chances of direct/dead shorting a battery are slim to none.THat's why it's not a issue that needs to be addressed. All they can say is don't use bullets and it won't happen... JMHO

[crash440]

But a fuse would take care of a direct short that way nobody gets hurt dont you think?

[Punisher 67]

I was wondering if gettting hurt from a battery is a safty thing then why has it not been addressed? It seems to me the battery people or the pros would come up with some type of a inline fuse that would pop if shorted out. Everything in your house or a car for that matter has fuses why not rc boat cars trucks etc?

Everything accept the high amp draw starter motor

You would need at least a 200 amp fuse to handle the spikes on your average setup maybe even more , you cross the pos and neg on a fused setup its still going to vaporise the contacts . Being very aware of what you are doing is the only safe way to play

[tiqueman]

I agree with you 100% on that being a stupid direction to go , what I am referring to is if someone takes that 4 cell 2200 kv motor out and replaces it with a 6 cell 1500kv motor to gain run time . That done properly will extend your runtime at the same speed . what you guys are referring to will happen and there is nothing you can do to stop it - you can't fix stupid . We watched that same scenario done last summer but with a apparition and the end result was a blown esc and motor - can't say we didn't warn our friend either of the potential consequences


.........

Absolutely agree w/ your high voltage low kv concept, I do it on some of my boats, but unfortunately, and I think Dale hit it right on the head, the car guys are coming in thinking the same concept applies to their boats. What they arent understanding which, like Fluid, Im tired of telling them and have given up, spinning wheels takes a lot less amperage than spinning the props they are trying to spin. Im no Hydrodynamics engineer, but its obvious and common sense will tell you that it takes more effort to spin a prop than it does to spin a tire. Ive tried till my fingers bleed to tell them they are asking for trouble, but again, they all seem to think they are the best and know it all because they have boats that do an assumed 80mph....