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Old 01-08-2010, 03:28 PM   #1
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Default BRUSHLESS/BRUSHED EQUIVILENT?

looking for a equivilent chart that converts brushless/brushed motors...re the size of each, example>>>> what brushed motor would be equal to a BL and visaversa
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Old 01-08-2010, 03:50 PM   #2
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Too hard to gauge now with timing advances with brushless and the fact they don't run together anymore.

It use to be 17.5 was a 27T but it might be a 19T or better now.
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Old 01-08-2010, 03:59 PM   #3
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With brushed just about extinct in competition, there is no longer a need for equivalency charts. I doubt you will find anything up to date.
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Old 01-08-2010, 06:47 PM   #4
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If I'm not mistaken, from BL to brushed you multiply the number of the BL motor by 1.73. (square root of 3) why 1.73? all BL motors are 3 phase motors hence the square root of 3.

BLTx1.73=BRT

Example= 13.5 X 1.73 = 23.355 (now you know why the 19T motors are more powerful if conditions are equal)

this is a raw conversion, remember that performance wise, you have to add voltage, timing ect ect.

Hope this helps
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Old 01-08-2010, 06:56 PM   #5
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Quote:
Originally Posted by greenracing View Post
If I'm not mistaken, from BL to brushed you multiply the number of the BL motor by 1.73. (square root of 3) why 1.73? all BL motors are 3 phase motors hence the square root of 3.

BLTx1.73=BRT

Example= 13.5 X 1.73 = 23.355 (now you know why the 19T motors are more powerful if conditions are equal)

this is a raw conversion, remember that performance wise, you have to add voltage, timing ect ect.

Hope this helps
Yeah that used to be pretty accurate but the latest updates have brushless motors running like the next fastest motor. 13.5 can smoke a 19t now I think.
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Old 01-08-2010, 07:09 PM   #6
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Quote:
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Yeah that used to be pretty accurate but the latest updates have brushless motors running like the next fastest motor. 13.5 can smoke a 19t now I think.
Yes you are 100% right!!

For me this conversion helps if i was in a hiatus from to say...3 or 4 years and back then, i run my 4x4 with a 10 turn motor and now that I'm back i do not have a clue what BL motor is in the ballpark of my 10 T brushed motor. With the formula i can seek a BL motor close to that 10 T brushed and not making the mistake that if i see a 10.5 BL, i assumed that it is a 10T equivalent brushed motor.
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Old 01-09-2010, 06:41 AM   #7
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Quote:
Originally Posted by wingracer View Post
13.5 can smoke a 19t now I think.

Yes. And you don't even need timing advance to do that.
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Old 01-09-2010, 10:17 AM   #8
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The problem is there are no equivalents. Even when we tried running brushed and brushless together there was always debate.

Think of it this way, how can you say a particular brushless motor is the equivalent of this brushed motor, when the gearing between the two has to be drastically different?
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Old 08-26-2010, 09:41 PM   #9
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Quote:
Originally Posted by greenracing View Post
If I'm not mistaken, from BL to brushed you multiply the number of the BL motor by 1.73. (square root of 3) why 1.73? all BL motors are 3 phase motors hence the square root of 3.

BLTx1.73=BRT

Example= 13.5 X 1.73 = 23.355 (now you know why the 19T motors are more powerful if conditions are equal)

this is a raw conversion, remember that performance wise, you have to add voltage, timing ect ect.

Hope this helps
That doesn't seem right. A 13.5 BL seems much much faster than a 23T brushed motor regardless of timing!
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Old 08-26-2010, 09:52 PM   #10
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Quote:
Originally Posted by or8ital View Post
Too hard to gauge now with timing advances with brushless and the fact they don't run together anymore.

It use to be 17.5 was a 27T but it might be a 19T or better now.
I think it started out with the 13.5 being said to the 27t equal
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Old 08-27-2010, 04:46 AM   #11
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Default Why not Both

have been Run Brushless since 2003

Brushless (positives) is incomparable to Brushed by:
Efficiency 70-90%
Very Low Maintenance (no Brushed Change) (but bearings).
Better buy another Motor rather buying Brushed for more experience.
Software Legal Timing (less Wrenching).
Sensored (abilities for a very low speed drive ability)
Sensoreless ( Dares to play with mud ).
Can run Newest Speed Passion Cirtix Motor Slotless Sensored Brushless.


Brushless (negatives)

Required 3 Wires for 3 Phase Minimum.
Require Sensor Wires for Sensored Motor.
sensoreless Cogging.

Brushed (positives)

we can run more than one motor at once on one controller.
Memory/cogitation
because any Brushless Controller is capable to run Brushed Motor,
very happy not to forget Brushed,
Better understanding for education.


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What ever i like both!
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