eZRUN brushless system - Page 3

Drifting101 · 10-03-2008, 04:51 AM

Nexxus try a fdr of about 9-9.2 for a 10t or 3900kv

When the esc gets to hot the cut off can kick if you set it

Also read the page about it

V12 · 10-03-2008, 07:27 AM

Is this ESC working good with 4 cells? From what I have read in the past a lot of sensorless BL have problems with cogging when running 4 cell.

nexxus · 10-03-2008, 04:36 PM

I know the ESC has a cut out, but rcmarket claims on their store the motor has a temp cut out too?

Didn't think that was possible with a "sensorless" system.

Would love Hobbywing to answer some of these queries.

veecee · 10-03-2008, 04:50 PM

Quote:

Originally Posted by cannon

We have played with the 12t version of the motor in a 4WD Mini Xpress using a 35-38mm rollout. The motor goes hard !!!

Cannon, is that the 3300kv? And is 12T the brushless rating - ie 12.0?

cannon · 10-03-2008, 05:53 PM

veecee,

It is hard to equate the Hobbywing motors to traditional 540 size motors.

The 12t is the 3300kV motor. Hoever this is actually a 380 motor with large heatsinks which makes the motor the same size as the normal 540 motor.

So in reality it is hard to equate a 380 size motor with a 540 motor. Suffice to say the 3300kV motor goes hard .. most probably harder than a nortmal 17.5.

As an aside, Hobbywing also do a sensorless 17.5 motor in 540 size that can be used on these ESC's. Not technically ROAR legal but a good club racing option

stocker · 10-03-2008, 08:02 PM

I think if the kv rating was compared, we would not need to bother about the actual size? Isn't like if I can run the 100m in 10 secs (10m/s), doesn't change the fact if I have a 30 inch or 40 inch waist? I could be more or less efficient, but I'll still do the 100m in 10 secs (10m/s). Does this make sense?

cannon · 10-03-2008, 08:28 PM

Same kV motos can have vastly different torque .. so it is hard to compare, especially when different size motors

veecee · 10-03-2008, 10:46 PM

Quote:

Originally Posted by cannon

veecee,

It is hard to equate the Hobbywing motors to traditional 540 size motors.

The 12t is the 3300kV motor. Hoever this is actually a 380 motor with large heatsinks which makes the motor the same size as the normal 540 motor.

So in reality it is hard to equate a 380 size motor with a 540 motor. Suffice to say the 3300kV motor goes hard .. most probably harder than a nortmal 17.5.

As an aside, Hobbywing also do a sensorless 17.5 motor in 540 size that can be used on these ESC's. Not technically ROAR legal but a good club racing option

I see. Thanks for the explanation.

vlozity · 10-05-2008, 07:03 AM

i'm using the eZRun 60A with 9T (4300kv) motor on my TA03F-S for drifting, i cant believe its so responsive on rough cement and the streets where i practice. i have yet to test it on the track. maybe i can this coming saturday.

i too would like to know the proper gearing for this system because my fdr is 8.01 and it does feel hot to the touch, i'd love to bring it down to 6.5 but it may be too fast for me to handle.

nexxus · 10-05-2008, 05:13 PM

Quote:

Originally Posted by vlozity

i'm using the eZRun 60A with 9T (4300kv) motor on my TA03F-S for drifting, i cant believe its so responsive on rough cement and the streets where i practice. i have yet to test it on the track. maybe i can this coming saturday.

i too would like to know the proper gearing for this system because my fdr is 8.01 and it does feel hot to the touch, i'd love to bring it down to 6.5 but it may be too fast for me to handle.

FDR should be 6.5 on a TC with a 9T, if your ESC and Battery stay cool and the motor heats up at an 8.01 ratio I'd say it's undergeared, the motor heats up as it spends more time revving it's box off than it should.

John Warner · 10-05-2008, 06:29 PM

hobbywing..... sent you a PM but never received a response.

vlozity · 10-05-2008, 07:28 PM

Quote:

Originally Posted by nexxus

FDR should be 6.5 on a TC with a 9T, if your ESC and Battery stay cool and the motor heats up at an 8.01 ratio I'd say it's undergeared, the motor heats up as it spends more time revving it's box off than it should.

thanks! i brought my gearing down to 6.75, its as far as i can go for now with my pinion set. tested it for about 15 minutes and the battery is cooler than when i was running with 8.01 but the motor still feels hot ... i'll get me some higher toothed pinions this week. the eZrun 60A v1.1 esc with the stock fan never feels hot even after almost an hour of running it.

btw, i'm thinking of getting a novak 7.5 and another eZrun 60A system in the next few weeks, i'll move the esc around with 2 other chassis. will the novak work without the sensors?

Airflow · 10-05-2008, 07:43 PM

Im not sure if it will work. The problem that I see with Novak motors paired with a sensorless system is that you have to deal with the sensor wire that is permanently attached to the motor. Unless of course you cut off the wires.

nexxus · 10-05-2008, 10:45 PM

Thats the nature of drifting though, it's full throttle a lot of the time and is harder on the motor than racing or bashing. As long as it stays under 160-170 you should be ok these Hobbywing motors appear to be sintered so they would be more tolerant to heat than say a Mamba or VXL Motor which still use bonded rotors.

I too am curious why Hobbywing doesn't respond to questions or answer PM's though. Also saw a post on Youtube where someone fried a switch on a 60A esc and the Ebay seller and Hobbywing now don't return emails there either. In this hobby word of bad customer service spreads incredibly quickly, hoping Hobbywing can answer some questions in the thread and return PM's.

Drifting101 · 10-05-2008, 11:37 PM

They have never replied to me either

Also my hobby wing system arrived today and it is awsome exept the wire is 16gauge for some reason, other than that it is awsome