medusa 70mm 2000kv wooooott!!!

[suicideneil]

Over revving the motor constantly (high rpms + low gearing = motor tops out very quickly and stays spinning at high rpms constantly when you are on the throttle).

Contact medusa and they will sort you out most likely, - I would do as the others suggest and swap it for a ~1600kv motor if you intend to use 6s lipo most of the time.

4s lipo = 1900-2200kv
5s lipo = 1700-2000kv
6s lipo = 1500-1800kv

As a very rough guide- 4 pole motors tend to perform better when span slower and geared higher, unlike 2 pole motors that work better span faster and geared lower to make their power/torque (least thats the impression I gotten over the years).

[lutach]

Completely understood, but that has happened with the best of them. I've seen Aveox (Some of the ones I have), Neu, Hacker and Lehner. It might be just a defect on the rotor's wrapping and the high RPM caused it to fail. Send it to Medusa and get the 1600Kv version for 6S lipos.

[e-mike]

for me medusa its the past.....i have a neu 1515 1,5d that ive run on 6 cell lipo and i never had any kind of issue,,,,and i dont understand they write on ther website that this motor can handle 30volt....?????


anyway its to late to send back to medusa the motor is in my garbage

NOW IM LOOKING FOR A NEU CASTLE OR A 1515 1Y...nothing else...

[BL_RV0]

You threw the motor away?!?! I'd have taken it in a heartbeat.... Or you could have gotten a new motor....

[suicideneil]

I cant believe anyone would dismiss an entire (repsected and reliable) brand on the basis of one, just one broken motor- have you seen how many people have had issues with Neus? The magnets detach from the shaft or the shaft snaps just as easily as with the Medusa you know, only there are many more reported incidents with neus.

What happens if/when the neu gets an issue, and they wont warrenty it because they think user error is to blame (dirt inside the motor for example), will you dismiss neus too?

The castle motors will be great, but the 2200kv is still abit high for my liking if you use 6s lipo constantly, but, thats your choice I guess, dont say we didnt warn you.

[BrianG]

I agree. Stuff can happen with anything. Even if the damage isn't covered by warranty, a new Medusa costs well under 2 bills, which is much easier to swallow. Unless maximum quality/efficiency is absolutely needed, Medusa fits the bill perfectly. And they are a far bit better than Feigaos or similar motors.

The only other motor I can think of that would meet Medusas cost to quality ratio is a CC Neu, but kv choices are rather limited at the moment. Not to mention that they get larger (heavier) as kv gets lower since they are retaining the same wind and coil configuration, they just vary the length.

[Aceldama]

Originally Posted by e-mike

for me medusa its the past.....i have a neu 1515 1,5d that ive run on 6 cell lipo and i never had any kind of issue,,,,and i dont understand they write on ther website that this motor can handle 30volt....?????


anyway its to late to send back to medusa the motor is in my garbage

NOW IM LOOKING FOR A NEU CASTLE OR A 1515 1Y...nothing else...

You didn't contact Medusa and take advantage of the warranty? Something stinks here...

[lutach]

One of his MMM went up in flame, will he throw the 7 MMM away and never buy another one? He did it with the Medusa motor so what's stopping him from doing the same with the MMM. Call me the , but I hope no one will use this thread as an excuse to not get a Medusa motor. Lets hope none of your Neu motors' have this issue.

[BrianG]

If that's the case, I'm sure there'll be a ton of potential Medusa and MMM buyers here...

[lutach]

Originally Posted by BrianG

If that's the case, I'm sure there'll be a ton of potential Medusa and MMM buyers here...

It should be the case. One motor fails (The only 70mm Medusa I know of) and one MMM goes bad, then it's fair to treat them the same way . Picture his Neu failing, what will he buy next a Hacker C50 at 3 times the cost of a Medusa without the same warranty. A nice Lehner and the amazing warranty they offer . Maybe a Plettenberg, they have some nice new motors out, but I have no clue what kind of warranty they offer and from what I've learned from the German manufacturers, they blame the user.

[e-mike]

dont worries guy's i know that medusa made great motor..of sure there are not a lot of failure like that reported about the 70 mm can...so my motor is in the way....to medusa compagnie i was just frustrated because in 2 days my mmmv3 went up in flame and the next day the magnet of my new motor come off of the shaft.....im just unlucky

[E-Revonut]

Originally Posted by e-mike

dont worries guy's i know that medusa made great motor..of sure there are not a lot of failure like that reported about the 70 mm can...so my motor is in the way....to medusa compagnie i was just frustrated because in 2 days my mmmv3 went up in flame and the next day the magnet of my new motor come off of the shaft.....im just unlucky

Unlucky? I don't think luck is part of the equasion. I think you might be asking to much of your truck/setup. Just because a motor is capable of being spun at 50K doesn't mean that you should. a lot of that rating comes from the bearing's capabilities. Magnets are a natural material and although we machine them into different shapes that doesn't always get rid of mother nature's inconsistincies. I highly recomend getting a lower kv motor for 6s! I ran my 1515 2.5d on 6s twice and it was too much to control, I have found 5s to be a better setup. While your motor is down send your packs to link and have some 5s setups made or 4s if you want to stick with the 2000+kv motors

[Finnster]

Originally Posted by e-mike

dont worries guy's i know that medusa made great motor..of sure there are not a lot of failure like that reported about the 70 mm can...so my motor is in the way....to medusa compagnie i was just frustrated because in 2 days my mmmv3 went up in flame and the next day the magnet of my new motor come off of the shaft.....im just unlucky

The main point of my post was to say I don't think you can just blame the motor when things look much more like user error, for the reasons listed. I know motors say X voltage max and Y rpm max, but that doesn't mean its a good idea to run it at that in every app. The setup you had was very very hard on the motor, and its not terribly surprising it failed. I'm not trying flame you or e-thug you or anything, but just to lyk, just swapping motor brands w/o addressing the underlying issues isn't going to solve anything.

Sounds like the gearing changes are a good step towards that, but you still will be using the motor at its limits, so extra caution and conservative settings should be taken to avoid further failures until the setup is really tested and proven.

[e-mike]

wow now im confused.....im the r/c for about 10 years(in electric)and now i feel like a newbee.... if the compagnie said that the motor can handle 30 volt and i push it to 25 volt its border line!!!????....wtf...my revo is geared like the stock revo bl edition...motor 200kv lower thant the neu castle...i dont really think im hard on the set-up if yes traxxas should not recommend to run the e-revo on 6 cell lipo...i run in my 2 other e-revo same exact set-up(18/68) but a neu 1515 1y and a 1515 1,5d(14/68) both on 6 cell lipo...my 1y never pass 128f(in 30 minute)and my 1,5d was 153f(after 33minutes)at 73f outside.. now(in my winter basher) i run a 1515 1,5y geared for the exact top speed that i was with my medusa....yesterday i run 48 min in line...ive got 98f on my motor at 39f outside..

[E-Revonut]

If your real car says max RPMs are 8000 are you going to run it at 8000RPMs everytime you get behind the wheel? Most like to leave some headroom for safety. Also remember that in General most of us are running a lot of WOT in our RCs unlike a 1:1 where a tranny shifts and you cruise at maybe 1/4-1/3 the redline RPMs.