Are Zippy Lipos safe with a Castle MMM Speedy?

[Pdelcast]

^^ That was a completely useless troll post. Thank you. Lemme guess, you are in Hong Kong and work for Hobbywing eh?

[superek4]

dun have to be nasty I m a customer n I was a fan of cc wen mm time, till I tried mmmv2 to v3 I hv so much disappointment. I m from Singapore not hong kong.

[Pdelcast]

Originally Posted by superek4

dun have to be nasty I m a customer n I was a fan of cc wen mm time, till I tried mmmv2 to v3 I hv so much disappointment. I m from Singapore not hong kong.

Your post was a troll post. "Trolling" is when you post something just to be obnoxious, and not to add any good content to a thread.

If you have had issues with the MMM V3, then you should post here about your problems, and maybe we could help you out. It doesn't do anybody anything useful to just post obnoxious inflammatory posts. ESPECIALLY when you come into my forums and start flaming my products.

[RC-Monster Mike]

Gearing up won't reduce the "pep" like it does in brushed setups, which are very finite in their ability to produce power. The limiting factor in creating "pep" with a brushless system is ultimately the batteries. If the batteries can deliver, gearing up will make it feel even more powerful. If they can't, then perhaps re-reading this entire thread is a good idea. This "gear up to reduce torque" philosophy is old school brushed thinking and does not apply here(and can be problematic).

[Pdelcast]

Originally Posted by RC-Monster Mike

Gearing up won't reduce the "pep" like it does in brushed setups, which are very finite in their ability to produce power. The limiting factor in creating "pep" with a brushless system is ultimately the batteries. If the batteries can deliver, gearing up will make it feel even more powerful. If they can't, then perhaps re-reading this entire thread is a good idea. This "gear up to reduce torque" philosophy is old school brushed thinking and does not apply here(and can be problematic).

QFT -- Mike hit it right on the head.

[JThiessen]

Originally Posted by RC-Monster Mike

The limiting factor in creating "pep" with a brushless system is ultimately the batteries. If the batteries can deliver, gearing up will make it feel even more powerful.

True...I had my mind wrapped around gear ratio only when I was thinking about it this morning.

[lincpimp]

Originally Posted by JThiessen

True...I had my mind wrapped around gear ratio only when I was thinking about it this morning.

Just adjust the punch control, and play with your transmitter settings...

[shizzon]

Het Patrick i have and off topic question for you. Does Castle Creations employ many mechanical engineers? I would guess that you would have some, not as many as you have electrical im sure. The reason im asking is that im currently in my junior year for my Mechanical Engineering Technology bachelors and just wanted to see if there are any opportunities for work in the RC-industry.

once again im sorry for the thread-jack

[Pdelcast]

Originally Posted by shizzon

Het Patrick i have and off topic question for you. Does Castle Creations employ many mechanical engineers? I would guess that you would have some, not as many as you have electrical im sure. The reason im asking is that im currently in my junior year for my Mechanical Engineering Technology bachelors and just wanted to see if there are any opportunities for work in the RC-industry.

once again im sorry for the thread-jack

We have 1 full-time mechanical engineer here at Castle, and several electrical engineers who think they can do some mechanical stuff from time to time... (one of the EEs is me.... )

[MrMin]

If it makes any difference I just took apart my 150A hobbywing and I must say that the mmm seems to be built much better. The screws are barely holding on the fan and it has no firmware upgrades, it also does not handle brushed motors and I have not run it at all yet. All I'm saying is that the mmm is better built and software is much better, and I dont think it will handle cheapo batteries better. BTW: It also has 30V fets x 12(http://www.onsemi.com/pub_link/Colla...NTMFS4833N.PDF).

I agree with mike too.

[Pdelcast]

Originally Posted by MrMin

If it makes any difference I just took apart my 150A hobbywing and I must say that the mmm seems to be built much better. The screws are barely holding on the fan and it has no firmware upgrades, it also does not handle brushed motors and I have not run it at all yet. All I'm saying is that the mmm is better built and software is much better, and I dont think it will handle cheapo batteries better. BTW: It also has 30V fets x 12(http://www.onsemi.com/pub_link/Colla...NTMFS4833N.PDF).

I agree with mike too.

MrMin -- are you saying the hobbywing has only 12 FETs?

The MMM has 36 of the Onsemi mosfets.

[MrMin]

I just took another look for our friend briang(see other post). I carefully counted only two banks of 6 fets. They were placed in the same place as the 80A, but there were only 12 of them. I could not remove the heatsink - it was glued there, all visible chips were the KIA78D05F (looks like a regulator/power transistor) and a uC whose numbers were filed away. The layout was almost identical to the 80A (see briang's post) and the fan has 4 hex nuts which just screw (barely) into the heatsink..I got to find a way to keep the fan on.... The rubber seal also is useless because there is a hole there...I doubt it really can compete with the mmm, but I'll give it a try someday - it is my backup esc anyway.

[Pdelcast]

Originally Posted by MrMin

I just took another look for our friend briang(see other post). I carefully counted only two banks of 6 fets. They were placed in the same place as the 80A, but there were only 12 of them. I could not remove the heatsink - it was glued there, all visible chips were the KIA78D05F (looks like a regulator/power transistor) and a uC whose numbers were filed away. The layout was almost identical to the 80A (see briang's post) and the fan has 4 hex nuts which just screw (barely) into the heatsink..I got to find a way to keep the fan on.... The rubber seal also is useless because there is a hole there...I doubt it really can compete with the mmm, but I'll give it a try someday - it is my backup esc anyway.

The Sidewinder has 12 FETs, the Mamba Max has 30, and the Mamba Monster has 36. I don't know how they could rate the controller for that many amps with that few FETs.

[BrianG]

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

[e-mike]

only 18 fet's....i always thinking that this beast had more than 18 fet's