Just an order update. Even tho it was listed as in stock. The last email i got yesterday said the order is being delayed because they need to bond the heatsink to the motor. I hope it will not take too long :) My RCPD Kit should be here Friday I think.. WooHoo!

Man i'm seriously thinking to get one,
I can't get the motor temp lower in my 1/10 Truggy (MM 4600 kv), I 've tried lower gearing, change timing, put heatsink on the motor. Still running really hot, in fact I can't drive 2 battery in a row or the motor will probably cook itself.

This may sound stup[ic but I was having a similar problem and I was advised to gear up not down. It seemed to help.

Is the ESC running very cool. (that is why they advised me it may be geared to low)

Highflier

ESC is running hot as well

Right at 11 lbs. I think it was 10 lbs 11 ozs. I will take some pics of my setup and some vids when I get a chance.


Tim

I am preparing to convert HB Lightning Pro Evo buggy. I want to use MMM ESC, Medusa MR-036-060-XXXXV2-5 motor and A123 cells.

I think about lighter setup. My track is rather short. Buggy does not have to be ballistic. 10 min runtime is enough.

I want to use 6S1P A123 cells. 6 cells fit chassis nicely, are light and can be charged as one pack with my Hyperion. 1600kv motor will not need as much current as 2000kv. Around 30 k rpm was enough for me in my brushless 1/8 stadium truck. Moreover 4 pole motors like to be overgeared.

What do you think about this setup (1600kv, 6S1P A123, 31 680rpm)?

With your goal to lighten the buggy, I wonder if a 36-50 motor woundn't be enough. Since your not going for incredible top speeds, or crazy long runtimes a 6s seems overkill to me as well.

Your plan sounds fine but seems contradictory to your goal.

I have a heavy mostly alloy HPI NMT(very close in size to an 1/8scale buggy) that does close to 50mph for 10 min on a Hacker C40-8L and 4s A123's.

http://i287.photobucket.com/albums/l...6/DSC05062.jpg

My Emaxx does 42MPH through grass for close to 10min on 5s A123's and MR36-50-3300v2

http://i287.photobucket.com/albums/l...6/DSC05096.jpg

I think you can meet your performance goals and reduce weight even further!

I just can't belive these motors are so good ;)

By lighter setup I mean 6S1P not 5S2P or 6S2P :)

What do you suggest? 50-3300 @ 5S or 50-2200 @ 6S

Well just to make sure I was thinking right I just did two back to back runs on my E-maxx one with the Medusa 36-50-3300 and one with my Neu 1512/2.5D both on 5s A123. The Medusa was running a 15t pinion 68t spur, the Neu on a 24t pinion and 68t spur. Both setups show 33mph on the Top speed calc @scriptasylum.com.

Data from the medusa run.

http://i287.photobucket.com/albums/l...parerunFDR.jpg

Data from the Neu run.

http://i287.photobucket.com/albums/l...irstrunFDR.jpg

As for driving the Medusa felt a touch faster and maybe a bit quicker off the line, the Neu felt like it had a bit more midrange torque, better for racing?? or too much maybe?

I plan to move the Medusa to my EMT now, still on 4s(fits the truck well) and this should be a nice setup I think, and kind of what I think I would do with an 1/8 scale buggy if I was going to race at less then ballistic speeds. I'll do some more swapping around and see how the Medusa does on 4s in the truggy.

I'll post back with some data later tonight.

Need to mod my motor mount for the Medusa, might not get to it tonight.

Thanks!

WOW! Only 9A of average amp draw.

I really want one of these motors, I wish they had what I need in stock.

Thanks for the info on weight xcellr8n.

Anyone order a bonded heatsink version? I still have yet to get an update from them on my order.

I will send them an email today.

Thanks,

I was waiting to get one also, but couldn't hold out any longer, so I bit the bullet and ordered a smooth can 1512/2D. Maybe I'll still pick up a 36-60-2000 in the future, but outdoor season is starting around here and I can't wait forever.

I did. I ordered the bonded 4800kv version since they didn't have the regular 4800 50mm version in stock. I sent them an email before it shipped requesting they not put on, or remove if they had put on, the heatsink. They did. So now I got a kickass heatsink and a fine motor.

No problem! This was a comparison that I was very interested in myself. I was amazed that the two motors were so closely matched. But it does appear if you want to save weight go with a high quality smaller motor with higher Kv and gear down a bit.


The only thing I still worry about is weather or not the bearings will fail early with such high RPM (45+k). I have a few hours on it though and it runs as well as it ever did:whistle: