broken Rotor CC Neu 2200kv - Page 2 - RC-Monster Forums

suicideneil · 10.23.2009, 04:13 PM

0.2% failure rate of MMMs, including all versions and generations (V1, V2, V3, Flux & Traxxas BL Erevo escs)- thats upto the start of the year though, so not the latest data available.

05:52 PM

Quote:

Originally Posted by suicideneil

0.2% failure rate of MMMs, including all versions and generations (V1, V2, V3, Flux & Traxxas BL Erevo escs)- thats upto the start of the year though, so not the latest data available.

0.2% = an average of 1 on 500.

A few weeks ago I read a topic about a guy who had his 4rd MMM. (Al the other 3 had failed) The change of this happening (if you look at the 0.2% failure rate) is an average of1 on 125000000! The chance of winning 1 mil in the Lotto is bigger than 3 MMM fail. Someone must be lying here, or is it me?

And btw, there are more people who had this problem: 3 (or even more) MMM failures.

scarletboa · 05:02 AM

Quote:

Originally Posted by suicideneil

0.2% failure rate of MMMs, including all versions and generations (V1, V2, V3, Flux & Traxxas BL Erevo escs)- thats upto the start of the year though, so not the latest data available.

from what i've seen on the forums, 20% would make a lot more sense.

i'm not trying to dog on castle, but i have seen a TON of MMM failures. hopefully mine won't have any issues.

suicideneil · 10.24.2009, 08:35 PM

As for the same user(s) having repeated failures, in the early days Castle went as far to get people to send in their entire setup, to see if they could replicate the failures in there workshop/lab. Hard to remember what the outcome was overall, but alot of it was put down to setup/ driving style combined with the slightly flakey V1 and V2 BECs...

These days, seeing the same people kill several V3s one after the other isnt just a coincidence, nor is it a sign that the MMM is still unreliable- I'd put it down to a problem, with the setup, even if that does sound like Im brown nosing Castle....

Dont forget too, that people with problems will post up their failures alot more than people who have no issues as all.

There is some interesting info to be found about failures and reasons if you dig deep enough- 30% failure rate on some old components that have since been switched for better qulaity ones for example. In another thread, Patrick goes as far to state the exact number of failures on the different versions- somewhere in the ~500-800 region for the V1 and V2, though the exact details escape my memory at present; many people sent in perfectly working V1s and V2s to upgrade to the V3 for free, but IM still rocking and original V1 that has been through hell- even the fan still works fine!

suicideneil · 10.24.2009, 09:04 PM

Did some digging- that 0.2% failure rate actually applies to just the V3s, of which there are over 10,000 shipped; clicky.

Shame you can only go back 500 posts when searching, makes life rather awkward

suicideneil · 10.24.2009, 09:13 PM

Found it:

1000 V1s produced
1200 V2s produced
25,740 V3s produced (16th june 09)

540 returns (V1, V2, V3)

Heres the thread (only 4 pages long):

http://www.rc-monster.com/forum/show...m+failure+rate

Kcaz25 · 10.24.2009, 10:43 PM

Sweet!!! Good info!

10.25.2009, 06:58 AM

Quote:

Originally Posted by suicideneil

Found it:

1000 V1s produced
1200 V2s produced
25,740 V3s produced (16th june 09)

540 returns (V1, V2, V3)

Heres the thread (only 4 pages long):

http://www.rc-monster.com/forum/show...m+failure+rate

That's an average of 1 on 51 MMM's fail. But the chance of having 3 MMM's which all fail is still an average of 1 on 132651... (So I'm not 100% sure if Castle is just 'hiding' some failures or it's just very bad luck or if the user is a huge noob, but there are many other people - who got some years rc experience - and have killed 3+ MMM's)
About the motor, 1 on 2500 is very good. I'm considering buying a 2200kv castle motor and compare it with my Bigmaxximum.
And about the ESC, 1 on 51 is not that good if you ask me. But how are other ESC's compared to the MMM's fail rate? Anybody know the fail rate of an Tekin RX8 or a Quark Monster Pro 125B?

sikeston34m · 10.25.2009, 07:11 AM

My V2 is still going Strong! It has performed GREAT everytime it's been called on.

The fan still works. Everything works like it should.

It's getting older now too.

It has probably seen 100 packs go through it. 4S, 5S, and 6S!

suicideneil · 09:43 AM

4% failure rate on mainly the old MMMs isnt too bad at all, especially given its power handling capabilities and built in switching BEC & easy to use pc programmability- compare that to cooked Schulzes that they (schulze) would refuse to warrenty 99% of time, or the expensive MGMs that are a nightmare to programme via pc, and it suddenly doesnt seem so bad.

Besides, no other company that I've seen has ever released failure rate info, and some even deny a problem with their escs and just fix the issue in silent- Castles openess should be applauded, rather than used as ammo to find some non-existant design flaw in their escs thats causing failures; even then the flaws are fixed with each new version of the esc, working towards making it truelly bullet & idiot proof.

As for the same user killing multiple escs, its like I said, often either a setup issue (same setup each time = dead esc each time), some kind of external problem (landing a big jump at the track without any padding under the esc, resulting in physical damage), or just occasionally, freakish bad luck

EDIT:

upto a 60% failure rate on xbox 360s has been reported according to numerous online poles and feeback from retailers, yet people still buy them happily knowing the odds are against them getting a working system for any length of time. 4% looks rather awesome by comparsion...

shaunjohnson · 10.25.2009, 04:36 PM

well the guys who have more than 1 failure in a row are either very very very very very unluckey...
or they are just stupid..."aww my savage flux cant do 60mph with venom nimh batts, the crappy MMM blew on me, i'll just get another one and try again"
DUUUUURRRRRRR!!!!!!!!!!!!!!!!!

himalaya · 01:47 AM

Bugs in earlier production batches are common and comprehensive. Personally two MMM V2s died on me but I failed to make that happen again on my V3(not to mention those minor fan problems). Castle has clearly done great improvement on V3, and they DO take great care of the earlier customers, and their money, and their patience/trust.

suicideneil · 10.26.2009, 11:01 AM

I have my own theories about repeated failures = high powered steering servos. Cant help that thinking they have something to do with BEC failures (since thats all the BEC powers essentially).

Funny thing is Shaun, that on the HPI forum, thats the exact trouble people were having; over gearing their FLUX when using naff lipos, then ranting about sueing castle and hpi because the esc went up in flames ( I actually caused abit of controversy by going over there and flaming the retards about the whole sorry issue, but trying to reason with noobs who arent in touch with reality is never an easy thing...).

RBMike · 02:24 PM

Quote:

Originally Posted by shaunjohnson

well the guys who have more than 1 failure in a row are either very very very very very unluckey...
or they are just stupid...

That's not true, I probably had 7 or 8 V1 & V2 failures but have not had a single V3 failure (I have 3). All in the same 2 car setups. The first versions were just not up to the quality of the V3's. The failure rate now on new versions is very acceptable. The important part is that Castle took care of all the ESC's with issues and fixed the problems. Now we have a reliable MMM. I'm not counting fan failures because I don't use them (after they die I just pull them out). As for the motors, even a bullit proof motor is boud to have a couple of failures. Castles motors have been MORE than reliable.

shaunjohnson · 04:44 PM

ok so missed the bit about the V1 and V2, they did have some issues...

Quote:

Funny thing is Shaun, that on the HPI forum, thats the exact trouble people were having; over gearing their FLUX when using naff lipos, then ranting about sueing castle and hpi because the esc went up in flames ( I actually caused abit of controversy by going over there and flaming the retards about the whole sorry issue, but trying to reason with noobs who arent in touch with reality is never an easy thing...).

and thoes kind of people seem to reside on the hpi forum a lot more than the trx forums...

i think it's the "big and beefy, unkillable" advertising that hpi does, they advertise these huge speeds and huge jumps and customers want that too....but dont have the knoledge of the correct setup.
both traxxas and hpi need the little "do the math" note from castle in their boxes!!