Medusa Afterburner V2 BL motors

[Cain]

Wow, I must have just missed buying it from them. Went and ordered it direct from Medusa but its going to take 3 weeks.

Does the motor come with a flat spot on the shaft?

[TexasSP]

I ran my setup again today after getting a thermometer. Temps were 125-135 esc, 100-105 batteries and 165-175 motor. Ambient temps are 95-98. The thing is I am geared 20/68 now, but yesterday when I was 22/68 the esc shut down. So I don't think gearing the pinion higher is the answer and I don't have anything smaller in pinions right now. The testing was done mostly in thin grass (only slightly thicker than say a golf course). I got to run for about 5-8 minutes until an unforeseen object caught the maxx and busted the rear shock tower. It was still drivable though dragging its butt on the ground.

Originally Posted by TexasSP

I ran my setup again today after getting a thermometer. Temps were 125-135 esc, 100-105 batteries and 165-175 motor. Ambient temps are 95-98. The thing is I am geared 20/68 now, but yesterday when I was 22/68 the esc shut down. So I don't think gearing the pinion higher is the answer and I don't have anything smaller in pinions right now. The testing was done mostly in thin grass (only slightly thicker than say a golf course). I got to run for about 5-8 minutes until an unforeseen object caught the maxx and busted the rear shock tower. It was still drivable though dragging its butt on the ground.

Do you have air holes in your body? Those temps aren't terrible for the kind of heat your running in, a little air flow might be enough if you dont have some already.

[TexasSP]

Body off for the testing. I will probably do a new body and cut vent holes in it as the traxxas bodies are too flimsy to cut into. I was doing some more testing and the controller had to be really stressed to get over 130 so I think I am good there.

[tom255]

Originally Posted by Cain

Wow, I must have just missed buying it from them. Went and ordered it direct from Medusa but its going to take 3 weeks.

Does the motor come with a flat spot on the shaft?

50mm motor came with flat spot on full lengt on shaft.

[George16]

Originally Posted by tom255

50mm motor came with flat spot on full length on shaft.

The version 2 did not come with any flat spot. I have to grind it on mine but I ended up returning it in favor of the 36-60-2000Kv motor. I'm hoping to receive it next week.

[Cain]

Originally Posted by tom255

50mm motor came with flat spot on full lengt on shaft.

Does the 60 2000kv V2 come with a flat spot??


Can someone explain the 920W, 87A, 105A, and 30V values as far as how they relate to each other for this:

MR-036-060-2000V2-5 2000RPM/V 1.70A 0.006 920W 87A 105A 30V 36 x 60mm

Is 920W the watts that can be produced sustained or peak? Would a peak for this motor be 105A x 30V = 3150W??

Assuming a 14.8V setup that is rated at 120C continous, how do I determine the possible amp draw on the batteries, or, is it limited to a max 105A?


Trying to decide on some batteries here but not sure if my max amps rating that would be pulled is 105A by the motor, or thisL

3150W / 14.8V = 212Amp peak? (got a chart here that breaks it down this why by different voltages)

[suicideneil]

Watts = volts x amps.

920watts would most likely be maximum continuous output.
87A the max continuous rating.
105A the max peak rating for 30 seconds or so.
30V the max rated input voltage.
1.70A is probably the idle current.

In theory, the max current draw you will see is around that 87A area, but peaks will be higher, up around 120-130A usually, depending on vehicle weight, gearing, kv rating of the motor etc etc.

920W / 14.8V = 62A continuous, but as a general rule anything that can provide 80amps or more is fine; the higher the capacity & C rating, the better ideally.

[Cain]

thanks for the info!

[Maciolus]

I have just finshed my latest conversion. HB Lightning 2 Pro Evo, MMM, 6S1P A123, 14/46 and Medusa 36-60-1600.

That motor is absolutely amazing! I have recorded 1807W peak
http://picasaweb.google.pl/Maciej.St...79480907914834

Ambient temp around 65F, motor after 10 min run 115F

Now I need 36-70 for my truggy and 36-50-3300 for B44 :)

[killermmn]

not bad!!

[sikeston34m]

Originally Posted by Maciolus

I have just finshed my latest conversion. HB Lightning 2 Pro Evo, MMM, 6S1P A123, 14/46 and Medusa 36-60-1600.

That motor is absolutely amazing! I have recorded 1807W peak
http://picasaweb.google.pl/Maciej.St...79480907914834

Ambient temp around 65F, motor after 10 min run 115F

Now I need 36-70 for my truggy and 36-50-3300 for B44 :)

Nice!!!

I've been wondering about these motors for awhile.

If you wanna see even more bump, you should try it on 6S Lipo. Something in the 20C-30C. Fit in as many mah as your battery tray can hold.

This is the setup I wanna try in an E Revo or an E maxx.

Same motor as yours
Mamba Monster V3
6S 20C 5000mah Lipo (Should be good for 100amps continous)

What Mod 1 Gearing would be best to run in a heavier truck like this?

What top speed should we gear for? I've seen anything much over 50mph in a Monster Truck is just asking for huge tumbles. LOL


Nice Watts you're putting out there. Thanks for the Graph. Nice Info!

[Maciolus]

I will probably try 6S 5000mAh Zippy. I think power peaks will be above 2kW :D

That will be perfect combination for Revo or Maxx.

Try to calculate optimal gearing with Parameter Solver:
http://scriptasylum.com/rc_speed/_solver.html
This is very useful tool.

[Unsullied_Spy]

Do you need to cover up the holes in the motor? I've got a RC-M heatsink clamp with a trimmed washer on mine but haven't run it yet.

[tom255]

I am pretty satisfied with medusa 60mm and 2000kV motor. It works on my truggy very well! Exact power for racing dont need more! For speedruns and bashing maybe not enough. I use fan additionaly and temps never go over 60c~140f
Mine had same issue like on feigaos, rear endbell on hard racing came off. So drilled 2 holes from each side and screwd 2-2mm bolts there like on NEU's.
BTW 60mm can dont have any flat spot
One cons more: When i run motor in my hands i feel that rotor is not balanced well, on some speeds it resonate and i think it can affect on bearings some time. So quality is not the best. But for sure one of the best choise after feigao