Are Zippy Lipos safe with a Castle MMM Speedy? - Page 13 - RC-Monster Forums

Pdelcast · 07:41 PM

Quote:

Originally Posted by BrianG

36?? I only counted 18 on the MMM. Then again, I haven't taken apart my V3 for fear of damaging the warranty.

All the MMM versions have 36 FETs.

Picture of MMM without heatsinks: (Sorry -- took the picture with my phone, not very clear....)

slimthelineman · 03.04.2009, 07:45 PM

hey patrick, any 6s batteries come to mind for racing a rc8/1512 3D? currently running some neu 3200 xp's but the tech @ castle said they were a little too small.

Pdelcast · 03.04.2009, 07:52 PM

And for those who might be interested, here is a panel of 20 MMM boards, with a single X-OUT circuit (bad circuit detected by test machines, and left unpopulated.)

e-mike · 03.04.2009, 07:54 PM

thanks for the clarification Pdelcast!!!!!like ive said so many time the mmm is a powerful esc

e-mike · 03.04.2009, 07:57 PM

so there not a big difference(in fet's number) between the mamba max and the mmm... why the monster it is a lot more powerfull???

Pdelcast · 03.04.2009, 08:03 PM

Quote:

Originally Posted by e-mike

so there not a big difference(in fet's number) between the mamba max and the mmm... why the monster it is a lot more powerfull???

The number of FETs dictate the amount of current (AMPS) that the controller can handle. The Mamba Max and the Monster Max are similar in peak amp handling capability, but because the Monster has a large heat sink and fan and more FETs, it's continuous amp capability is a little higher.

The Monster is also capable of double the voltage of the Mamba Max, which doubles the power handling capability.

ALSO, the FETs are better today than when we designed the Mamba Max -- so the current version of the Mamba Max can handle more power than the original. (the number of FETs is a bit of an overkill on the Mamba Max.)

sikeston34m · 03.04.2009, 07:57 PM

Quote:

Originally Posted by Pdelcast

And for those who might be interested, here is a panel of 20 MMM boards, with a single X-OUT circuit (bad circuit detected by test machines, and left unpopulated.)

Wow Patrick!

That's some really neat stuff you're doing there. I think I could just get lost on your side of the street.

I want to learn more, that's why I ask so many questions sometimes.

johnrobholmes · 03.04.2009, 08:05 PM

The MMM build is almost fully automated then eh? Pick and place for the bullets? I would guess you put on the heatsink and case by hand.

Pdelcast · 03.04.2009, 08:08 PM

Quote:

Originally Posted by johnrobholmes

The MMM build is almost fully automated then eh? Pick and place for the bullets? I would guess you put on the heatsink and case by hand.

Actually, the bullets are placed by hand before reflow. Wish we could place them by machine, but they are through-hole and a tight fit (for current handling.) (It takes a steady hand to place them...)

Power wires are soldered by hand, cases, labels, heat sinks, fans, etc. are all placed and assembled by hand.

Pdelcast · 03.04.2009, 07:54 PM

Quote:

Originally Posted by slimthelineman

hey patrick, any 6s batteries come to mind for racing a rc8/1512 3D? currently running some neu 3200 xp's but the tech @ castle said they were a little too small.

We use a lot of different batteries here with good luck, but I think everything we have used has been in the 5500mah or larger range. I'll ask Mike to recommend something for you.

Thanx!

fastbaja5b · 03.04.2009, 09:10 PM

I thought 4 pole motors preferred 10 degrees timing

fastbaja5b · 03.05.2009, 01:42 AM

Ya know what, I give up hey, I just sold the Zippys on another forum and I'll stick to running the Flux as a 4s, it's more than fast enough for me in that form.

It seems ur not safe unless you have 8000mah 40C 3s Lipos and only maxcramps makes those claims!

skellyo · 03.05.2009, 09:34 AM

Quote:

Originally Posted by fastbaja5b

It seems ur not safe unless you have 8000mah 40C 3s Lipos and only maxcramps makes those claims!

That's not really true. IMO, unless you go stupid high on the gearing and tire size, high quality 25C/50C 4000mAh cells are more than enough for running the Flux on 6S. The chances that you're going to be drawing 100A continuous is slim to none. 6S 25C 4000mAh packs ideally can output almost 3HP of power continuously. There's no way in hell you're going to be pulling that kind of power continuously.

Sammus · 03.05.2009, 09:45 PM

My bro runs a mmm 2200 on his savage XL conversion on 4000 6s zippy packs. it goes faster than you'd ever want to drive it and has an insane amount of power and nothing gets more than a few degC over ambient... so htfu and start running 6s :D

fastbaja5b · 03.08.2009, 07:45 PM

Another flux down, fried ESC

http://www.e-savage.com/forums/showt...ed=1#post37426