jpracing1997

I have a supervee with a 7l motor and a hydra 120 with a couple of batteries. I have a coupke of packs. Two 2s 4000 mah packs, and Two 3s 4000 mah packs.. Which way should I run them in this boat? 2s 2p 4s total or 1 3s and 1 2s for 5s total or 2 3s packs for 6s total. What can this speed control take? And what could I do to run 2 3s packs.

headhunter23

at 120 amps, I would keep putting battery's in parallel just due to the motors ability to suck back the juice. Saves your packs. On top of that start with a certain prop size and keep enlarging it until your find a speed that you like. As you enlarge the prop, the motor will draw more amps to try and keep the prop spinning at that speed determined by the voltage and you will go faster.

I would recommend the avg of 14.8v(most people run their boats on) so combine them to keep that as a goal.

detox

Check out this SuperVee with 9xl, hydra 120, and 5s lipo:

http://youtube.com/watch?v=l814TEnb9yw&feature=related


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ryan_t888

The 7L isn't really a good motor if you plan on going fast. You are limited to running only 2 cell LiPo for continuous running. Any more and something will puff. Running 2s2p on an X640 will get you nearing 40mph.

Many people don't understand. You don't match different cell counts with a specific motor wind. First pick the amount of cells you plan on running, then pick a wind to best run with that cell count.


Ryan

jpracing1997

So can i run a total of 4s in this boat? 2s2p right?

Silent-AV8R

Take a look at this site:

http://scriptasylum.com/rc_speed/_lipo.html

It will help to explain the "S" and "P" thing.

SV27dayton

Nice. This demo belongs in a FAQ somewhere.

ryan_t888

No you can't. You can only run 2 cells in "S"eries. Hence 2s.
s- series
p- parallel

Ryan