Higher pinions = safer MMM's? Or no? Someone's lying....

[lutach]

If anyone is willing to get on the brands of different battery packs, feel free to do so and just a heads up, Steve Neu might just change this C rating war. Please see the following: http://www.rcgroups.com/forums/showthread.php?t=1104509. I posted a couple of things in there and even included in my last post a few places that do test batteries specially lithium based ones. Those are some of the places I plan to use to test the cells I'm trying to get my hands on, but the military is a little bigger then I am . I know many places that do manufacture high quality cells, but they too can get caught in the C rating war and that's one of the reasons I push for a HV set up to keep my AMPs down on a safer side.

Dunno how the hell this went from a gearing question to Lipo C ratings, but whatever.

[fastbaja5b]

it always does

And yet I am still waiting for someone to show me a Savage Flux on 6s with a 25t pinion smoking.

[shaunjohnson]

Originally Posted by fastbaja5b

it always does

And yet I am still waiting for someone to show me a Savage Flux on 6s with a 25t pinion smoking.

give it a raz yourself
my recomendations, make sure you have top notch batts and watch your temps like a hawk and see what happens

[lutach]

Originally Posted by Freezebyte

Dunno how the hell this went from a gearing question to Lipo C ratings, but whatever.

Since people have mentioned it, I thought I would post something very important for this industry. If you don't think a standard for our lithium battery is needed, please buy MA packs and support them on their quest.

[J57ltr]

Originally Posted by Freezebyte

Dunno how the hell this went from a gearing question to Lipo C ratings, but whatever.

It's always been about the gearing, but braking is a part of the gearing, which could be part of the problem.

JEff

Well, good info nonetheless. It will be my last thread here. I've stirred up a hornets nest of hate against me and its best if I just leave here permanently for everyone sake.

Take care and happy RC driving all.

[TexasSP]

I don't quite get that but okay........I guess.........

[fastbaja5b]

DW he's sulking on all forums......

[J57ltr]

Originally Posted by Freezebyte

Well, good info nonetheless. It will be my last thread here. I've stirred up a hornets nest of hate against me and its best if I just leave here permanently for everyone sake.

Take care and happy RC driving all.

What? I don't get it, the only thing you did was get a good amount of info out, but didn't get your question answered, sorry we have asked again, but there may be politics involved in the answer. Who knows?

Nobody hates you or showed ill will to you. Granted the thread got somewhat off topic, but as I have read that's the way things go around here. One question gets asked and another pops up it's more like a transformation than a hornets nest. IDK maybe I sound like an ass sometimes, but that's just the way I am. Not trying to come off the way I do but I am usually posting from work and I still need to get other things done so I am a little curt at times. Sorry.

Jeff

[TexasSP]

Curt huh? and I thought your name was Jeff..........

[BrianG]

Wow, I didn't think this thread was bad at all. Hate to see you leave over some perceived slight, but oh well.

[Unsullied_Spy]

Taller gearing will put more load on the ESC, I'd assume that would translate into more stress on the ESC and therefore not safer for MMMs.

My Muggy weighed in around 14 pounds at one point running on 6s and geared for (including tire ballooning) 90 MPH and I ran the crap out of it for about 12 minutes and it still works to this day. That's not being used intelligently and I just had the Muggy out again earlier today and the MMM is still kicking strong, they aren't as touchy as the internet drivel leads many to believe.

EDIT: I should mention this was on 20-30C Turnigy 5AH lipos and they were around 100 degrees after the run and didn't seem to cause any issues, not all Chinese packs are bad...

[lutach]

If I had something to do with this, I do apologize. Now if taller gearing or lower gear ratio is desired for a pure rush of sexy Ferrari speed, then everything must be up to par and that includes the batteries used which should be also mentioned here. The lower one goes on the ratio, the hungrier (Not sure if this is an actual word ) your motor will get and the ESC will have to provide the juice. The main cause of failure of a ESC is going over the AMP rating of the MOSFETs. A lot of engineers I speak with tells me a MOSFET will usually handle a little over voltage better then going above the AMP rating. Now the bigger pinion will make a vehicle go faster to a point the owner of the vehicle will have to let go of the throttle sooner letting everything take a breather or it might just be that the motor is not wasting precious energy in unloaded heat. Who knows, I'm just a noob at this brushless thing.

[J57ltr]

A little over voltage is fine but During Regen if the batteries can't handle it Its going to about 3 times the rated voltage of the FETS in which case the very thin layer of Si is damaged and the FET will short out, usually just after it's called into action again (when you take off), once one goes then the rest are sure to follow. At least that has been my experience with overvoltage and mosfets.

Jeff