MySlowZ

Getting an X12 17.5t for my TC6.1. What FDR should I run for 17.5 boosted? The track is fairly small 80x30. Also any suggestion for esc set up (using Tekin RS Pro)?

BlackStarRacing

iTrader: (40)

Good day,

I was wondering what is the max temps and ideal temps for running a x12 13.5t in a Losi 22 with ssx stock spec. V2?

Thanks for your advice,

Buckaroo

iTrader: (3)

X12 instructions say max temp of 210F. They're not even close to smoking at that temp. Usually they come alive above 170.

daleburr

Ideal temperature would be 0 Kelvin, as then the wire would have no resistance and the bearings would have no friction. Since that isn't possible, you just want it as cold as possible for maximum efficiency.

Unfortunately that's at conflict with getting maximum power, which makes the motor hot.

Keep it at 100degC or below (measured externally) and the X12 will be fine. I'd be suprised if you can get it that hot with a 2wd buggy anyway, so it's not likely to be a big issue.

BlackStarRacing

iTrader: (40)

Thank you both for your timely manner in replying.... Want to be safe!

MySlowZ

So I ran my 17.5 yesterday. Ran real strong and barely got warm after each packs (40 mins rest between each pack). Don't know what happened..., but while driving 3 mins in, the car felt strange, almost as if there was no brakes. So I kept going for maybe another 2 mins, before finally decided to pull the car in. That's when I noticed the motor was extremely hot!!! Tested it again today, motor seems to run fine but braking feels weak. Anyone know what I may possibly screwed up and might have to replace to fix this problem?

MySlowZ

Also I notice a humming squeaking noise when braking hard, is this normal?

Pro10noob

iTrader: (13)

Check bearings and if the rotor is shimmed ok(to little play).
This happends even with new motors(bad shimming)
The LRP X12 motors need there bearings lubed rather often
Weak brakes on a X12 point to a rotor being to hot.
You also loose power in the lower rpm range.
If this is the case, you have to replace the rotor to get brakes and power back.


regards Roy

daleburr

It's possible that the magnet has come loose from the rotor shaft (not totally loose as you'd have no drive; but not 100% attached). You'd normally notice this under acceleration, but maybe in 17.5 blinky the braking force is higher than the acceleration force.

This does sometimes happen on the X12, my 10.5 did it last year and I know of others it's happened to. You can superglue the magnet to the shaft, or just buy a new rotor.

MySlowZ

Thanks for the reply guys. I'll try replacing the rotor this weekend and hopefully this solves the problem. Is there an upgraded rotor for 17.5t (like a rotor for more rpm or torque)?

Buckaroo

iTrader: (3)

brent701

iTrader: (8)

Sorry to bring this thread back up but I got a few problems with a LRP Vector X-12 motor 13.5

What is the average operating temps for these things?

I can not get the damn temp under 180.

I have gone from a 30/69 gearing to 26/72 gearing.
It's killing me. I want it a little cooler if possible.. Do these motors like to be ran hot? It doesn't seem to be effecting power at 180 but I would rather not smoke this motor I just got it.


thanks for any help

Setup is a B4.1 Buggy with a Viper VTX10 ESC in blinky mode stock timing on the motor. Current gearing is 26/72 came off the track after 5 min at 178.

I am going to try a high Spur tomorrow. and see what happens

Buckaroo

iTrader: (3)

X12 runs hotter than all other motors. If you apply the temp limits of other conventional motors, you're going to be slow. X12 doesn't come alive until 160. 180 is more than fine, it's about perfect. Instruction sheet says it's good up to 210*F. Believe it. Only motor I know of that can easily go hotter than the instruction sheet and live.

brent701

iTrader: (8)

interesting,
my manual that came with it says 160 degs and to stay at a 7 FDR
I have tested 7, 7.5, 5, 6, al all in between

I guess I will just leave it where it is at then

thanks

RedBullFiXX

iTrader: (34)

Motor temp can & will vary depending on Ambient temp

180+ is nothing to worry about for an X-12