Please help a lost nitro guy convert to BL!!

I have a questions for people runnning 5S or 6S lipos? Do you take into account the weight or just go for a more efficient system?

All I do is bash, 3' to 7' high jumps most of the time. Do you 6S guys do that? Just wondering.

45min to 1hr runtimes are a must, so far I found 4S 8000mah's do really well for my needs.

[lincpimp]

Originally Posted by bluonyx

I have a questions for people runnning 5S or 6S lipos? Do you take into account the weight or just go for a more efficient system?

All I do is bash, 3' to 7' high jumps most of the time. Do you 6S guys do that? Just wondering.

45min to 1hr runtimes are a must, so far I found 4S 8000mah's do really well for my needs.

Well, if you go from 4s to 6s you can maintain the same weight battery, it will have less capacity, but runtimes will be equal or slightly better. Plus the equipment will run cooler (considering it is geared correctly and also fits the intended voltage). Also, overall power will be more, and I notice that poer and toeque at higher speeds seem to be more than with a 4s setup.

I bash just as hard with my lv systems as the hv ones. Personally I really like 5s with a quark esc and a higher end motor (aveox, hacker, etc). Seems to be the best for bashing on a budget given current battery technology. I am sure that 5s and 6s setups will be more popular after the MMM has been released and gained acceptance.

[jhautz]

Originally Posted by bluonyx

I have a questions for people runnning 5S or 6S lipos? Do you take into account the weight or just go for a more efficient system?

All I do is bash, 3' to 7' high jumps most of the time. Do you 6S guys do that? Just wondering.

45min to 1hr runtimes are a must, so far I found 4S 8000mah's do really well for my needs.

You can get the same run time on lower mah packs when you go up in voltage. You use a lower kv motor so the system put out the same amount of power over all, but more of it is generated with volts rather than amps.

Heres how I figure relative run time for 4s to 5s to 6s... Multiply the nominal voltage by the mah of the pack and that gives you a total potential energy for the pack. A 4s system with a proper motor and gearing with a total potential energy number similar to a properly set up 5s or 6s system using a battery with a similar total potentail energy should give you similar run times and the pack weight really should be close to the same as well.

4s 8000mah= 14.8V * 8Ah = 118.4 Watt Hours
5s 6000mah= 18.5 * 6Ah = 111 Watt Hours
6s 5000mah= 22.2 * 5Ah = 111 Watt Hours

The difference is rather than running the same motor and spinning it faster you should be choosing a lower kv motor for the higher voltage and spinning it about the same total rpm (or manybe even a little less since the higher voltage with provide higher torque that would allow you to gear up a bit) so you can creat about the same averall speed and run time. The diference is you are creating more of the power with voltage rather than amps.

remeber V * A = Watts (power)

Not sure if I did a great job of explaining this, but I think you will understand what I'm talking about.

[lutach]

For a Muggy, I would go with a 1521/1Y. It will be very happy on 6S or 5S lipos. I'm running 5S 9200mAh now and I can also run 10S 4600mAh when I feel the need for breaking parts, bending shaft and ballistic speeds. If and when Castle decides to make a Monster Max that can handle 12S lipos, you can easily run 12S 3700mAh 20-25C packs with the appropriate Kv motor for over 30 minutes.