4s 5000mah in parallel...to give 10000mah..is it possible in a supervee?

[leeuk]

hey guys..

as title says,is it ok to run 4s 5000mah lipo in parallel? ive jut won a stock supervee 27 and wondering if it can handle 4s as stock?

i run a brushless losi 8b 2.0 buggy and wondered if ide be able to use the same lipos as i have a few 4s and 5s all at 5000mah minimum and 25-35c but also 30-40c too,i also have a 4s 8000mah 30c lipo if thats any use?

the main thing ive noticed with fe boats is runtimes are alot less than land rc's..why is this?

also providing the esc,motor and lipo/nimhs stay cool...is it ok to run longer than say 5-10 mins?

any help on this would be great,thanks

[siberianhusky]

That might be a bit heavy a load for an SV, it's designed to run with 2 2s 5000mah packs in series.
Boats draw a way more current than any land or air based vehicle, main reason cheap stuff that lasts in cars and planes doesn't last long in boats.
Biggest problem with extended run times is heat, we generate it faster than we can remove it even with water cooling.
You can run for longer but you'd have to settle for slower speeds, turn a smaller prop etc. to lower the amp draw to where the cooling system can keep up with the heat generated.
The motor in my SV comes in about 110 degrees, after 3 to 3:30 minute runs this is with two cooling pickups, one for the motor, one for the esc, boat is completely stock otherwise, oh ya upgraded the cooling jacket to an aluminum one. My buddy just overheated and cooked a cheap HobbyKing motor, ran fine for almost a year, last week it just went up in smoke for no known reason, 3:15 long run, I was filming the run. The esc still arms so it may have survived.
A couple 3000mah 4s packs in par. would be fine, I just wouldn't extend the run times too much or it may go up in smoke.
This is one of my favorite boats, it feels like it is going so much faster than my other boats, you actually have to drive these things or they end up upside down. Sometimes even crossing you own wake can get interesting!
This is one boat that IMO doesn't need any more power, stock is enough. Get 3 or more racing around a course and its a blast.
Spec classes are my favorite, with everybody having similar power systems it comes down to tuning and driving.
In reality all the classes are kind of spec, you want to win you use one of a couple of motors, use one of a couple esc's, and choose one of a few hulls available, they just go a lot faster and cost a lot more! Still comes down to set up and driving as we can't modify the motors or esc anyway. One of the reasons I'll always have a couple of nitro boats, more secret voodoo going on with IC engines!
Cheers and enjoy the SV they are a hoot for a small boat.

[leeuk]

thanks for info buddy,i realistically dont want to change much from stock as this boat is mainly to "get my feet wet" (excuse the pun) in fe boats
definately wud like a better esc with lvc and bec but then if i can safely use 2s,3s,4s lipo for abit more speed then im happy with that.

i do have a spare castle 2200kv motor,would that be any gud in a fe boat?

[Brushless55]

hey guys..

as title says,is it ok to run 4s 5000mah lipo in parallel? ive jut won a stock supervee 27 and wondering if it can handle 4s as stock?

i run a brushless losi 8b 2.0 buggy and wondered if ide be able to use the same lipos as i have a few 4s and 5s all at 5000mah minimum and 25-35c but also 30-40c too,i also have a 4s 8000mah 30c lipo if thats any use?

the main thing ive noticed with fe boats is runtimes are alot less than land rc's..why is this?

also providing the esc,motor and lipo/nimhs stay cool...is it ok to run longer than say 5-10 mins?

any help on this would be great,thanks

bro, if you have the packs try it out and let us know
the extra weight will actually help the hull stay in the water when you run bigger props
a good setup could be 4000mah 4s packs in prallel

and as long as you keep the electronics cool you can run it all day long without issues...
and on the flip side if temps are to high, running 1min can damage things

[leeuk]

well its arrived today,must say im impressed and cant wait to get it on the water

really wanna try my 4s 5000mah lipos in parallel but with the esc not having a lvc not sure if its worth risking it,altho i could just do short runs and use a voltage checker i guess

one thing id like to know is how well do these run on just 7.4v (2s lipo not in series)

[Brushless55]

well its arrived today,must say im impressed and cant wait to get it on the water

really wanna try my 4s 5000mah lipos in parallel but with the esc not having a lvc not sure if its worth risking it,altho i could just do short runs and use a voltage checker i guess

one thing id like to know is how well do these run on just 7.4v (2s lipo not in series)

that's kinda how I run..
go out for 4min then come back to check voltage

on just 7.4v the boat may not perform well at all... but maybe 18-20mph?

[leeuk]

what capacity lipos do you run buddy?

what sorta run times do you get?

[Brushless55]

I run 5000mah packs and keep my runs to about 5min depending on prop...
I think I've run 10min before on a 40mm 2 blade prop before...
But I don't go beyond 80% use on my packs anymore

[leeuk]

id like to get as much runtime as possible,i dont mind sacrificing abit of speed in order to do so

[fastblack]

a mate is running stock supervee 27 with octura x642 detounge and 4cell lipo he uses 5000mah 4cell rhino 25c on each side of boat,

so the answer too your question is yes it will work....!

[leeuk]

awesome,is his sv ok with the weight of the 4s lipos?

[Brushless55]

awesome,is his sv ok with the weight of the 4s lipos?

I think I've said this before, the extra weight will help the boat settle and stay on the water rather than constantly bouncing out of the water

[leeuk]

you did say that buddy,i understand that more weight will help it stay in the water and bounce less but i meant will it be abit too much weight?? and also cause the boat to be slower?

[Brushless55]

No I think with the extra weight the boat will handle very well
you can have a slow boat with two 2 cell lipos if running to wet
keep the cg good and the boat will rip real nice, with the longer runtimes..