LOSI 8T 10S Rocket........... - RC-Monster Forums

jhautz · 12.04.2008, 08:05 PM

So you dont think that running the motor at its rpm limit and haveing the Center dif gears get chewed up when the dif bearing failed could have put any stress on the motor bearings? Seems pretty coincidental to me that the motor failed the next time you ran it. I wouldn't blame the guy you bought it from or the motor itself. Anything will break if you push it to its rpm limit and then add additional stress of chewing up gears. Thats the price you pay for pushing things to their bleeding edge IMO. You would have probably ruined a brand new motor doing that too.

speedracer1129 · 12.04.2008, 09:00 PM

Quote:

Originally Posted by jhautz

So you dont think that running the motor at its rpm limit and haveing the Center dif gears get chewed up when the dif bearing failed could have put any stress on the motor bearings? Seems pretty coincidental to me that the motor failed the next time you ran it. I wouldn't blame the guy you bought it from or the motor itself. Anything will break if you push it to its rpm limit and then add additional stress of chewing up gears. Thats the price you pay for pushing things to their bleeding edge IMO. You would have probably ruined a brand new motor doing that too.

j,

I understand what you mean but here is the thing. I have confirmed with both Medusa and Neu on my situation yesterday. Both of them stated that the setup was not the problem. I am not pushing the motor to it's "limit". The motor is rated at 60k continuous use max, not it's absolute max. On paper, the setup pushes slightly over 60k, but in the truck it will only about 45-50 so I am in no danger as far as that is concerned. The fact when I tested the motor with the wheels off the ground I was getting high heat already. Funny thing is that I got 2 different answers on that. Medusa said it was possible that the motor would get to those temps in that scenario. Neu told me that that was happening because a magnet was already rubbing in the can due to something from before. They both did say that it seems that the motor failed due to a magnet or magnets becoming loose and rubbing internally which caused the failure once it tried to pull the weight of the truck. Lastly, the center diff gears don't exist in this truck....In other words, this truck has a custom solid spool that uses a plastic spur gear on it...that is it! If you are picturing a bunch of chewed up metal, that is not what happened. If it was, we wouldn't be having this conversation!!

jhautz · 12.04.2008, 10:08 PM

Quote:

Originally Posted by speedracer1129

j,

I understand what you mean but here is the thing. I have confirmed with both Medusa and Neu on my situation yesterday. Both of them stated that the setup was not the problem. I am not pushing the motor to it's "limit". The motor is rated at 60k continuous use max, not it's absolute max. On paper, the setup pushes slightly over 60k, but in the truck it will only about 45-50 so I am in no danger as far as that is concerned. The fact when I tested the motor with the wheels off the ground I was getting high heat already. Funny thing is that I got 2 different answers on that. Medusa said it was possible that the motor would get to those temps in that scenario. Neu told me that that was happening because a magnet was already rubbing in the can due to something from before. They both did say that it seems that the motor failed due to a magnet or magnets becoming loose and rubbing internally which caused the failure once it tried to pull the weight of the truck. Lastly, the center diff gears don't exist in this truck....In other words, this truck has a custom solid spool that uses a plastic spur gear on it...that is it! If you are picturing a bunch of chewed up metal, that is not what happened. If it was, we wouldn't be having this conversation!!

I cant help but wonder if the 30k rpm separated the magnet or the 60k rpm.... Hmmm

speedracer1129 · 10:53 PM

Quote:

Originally Posted by jhautz

I cant help but wonder if the 30k rpm separated the magnet or the 60k rpm.... Hmmm

j,

Who knows but I will say this. I think we will all agree that a Neu is a better quality motor than a Mamba yes??

With that said, I have personally pushed AND measured several Mambas pushing the 58-62k range while in a car pushing 100 plus on my data logger. If they can take it, I am pretty sure the Neu would as well. Of course, there is always the token black sheep that slips through the QC cracks