What Are Turns On A RC Motor?


What Are Turns On A RC Motor?

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For the RC motor, the turns mean how many times the copper wire is able to revolve around the armature. The higher numbers of the turn are the torque created for delivering the higher power. However, it also means that there are fewer amounts of RPM ratings for the electric motor of the RC car.. 

When you go to buy a new brushless RC motor for the RC vehicle, you need to compare the brands. Some manufacturers prefer Kv rating, while others suggest using the term of turn. This leads many people to wonder what turns on a RC motor?

The turns are a cylindrical magnet and the wrap of the copper wire placed inside the motor.The Higher the turns on your engine, the lower the RPM, but higher torque for your RC car. Some RC cars use turns to let you know the power of the motor, while other cars use KV. 

The RC Motor Turns

If you look inside a brushless motor, you can see a cylindrical magnet that can fit on the inner side. This cylindrical magnet looks like a wire net. Every single wrap of the wire around the rotor is known as a turn. The thinner wire can turn more by using the wire in the stator’s construction. So, if you need more turns inside the motor, you need to add thinner wire inside the motor.

On the contrary, the thicker wire makes only a few amounts of turns. Usually, the more turns inside the motor can lower the motor’s RPM and improve its efficiency power. Thus, a 17.5 turn (“17.5T”) motor isn’t fast like the 10.5T motor, but your RC car can run for a longer amount of time between charges with the 17.5T motor.

The RC Motor Kv

A motor’s Kv rating shows you its RPM per volt. The abbreviation of the RPM is revolutions per minute. It means a motor with a 2200Kv may spring at 2200 RPM per minute when it powers for one volt. Similarly, the 3000Kv motor can spin at 3000 RPM at one-volt power. The more RPM power means a higher number of RPM per minute by one volt, and the lower the number of RPM states the lower power volt RPM per minute of the motor. 

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This is why we can say that the Kv rating of a device and motors turns are interrelated with each other. You should always remember that the higher RPM means the short-lasting of the battery power, as it is faster and takes more power per minute. 

The Kv refers to the unloaded motor that can spin freely. After the installation of the RC motor, if you push with four or more pounds to the RC car, the motor’s RPM power will surely be less. Of course, a higher Kv motor works faster than the low Kv motor at the same voltage. 

The Motor Turns compares to RPM or KV

It is prevalent for the RC lovers to become confused about a new brushless motor for the RC vehicle. They think from which my car can be interpreted by turns or by Kv rating. In this case, you should remember the following points to know what turns on an RC motor is.

The Turns is the physical trait of a motor, while Kv is like horsepower. The turns indicate how much wire is being wrapped inside the motor. The higher numbers of turn mean more wire power with more resistance, which results in a slower quality motor. 

Thus, the turns with a fewer number states that you have a faster speed motor. The turn rating is taken as an inverse proportional to the power that occurred by the motor. You should always look at the turns and RPM in a simple manner. If you remember to look at it in a simple manner, you will always know that a 4.5T motor can run faster than a 21.5T motor.

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The Kv is related to the motor power supplied outer from the motor. This is why it would be best if you choose the right turn rating for your RC vehicle. Lower T values, like 4.5T, can result in a much faster car, but with a faster car, you lose quite a bit of torque. The Higher T values, for example, 27T, can be a higher torque with the lower Kv motor power. Most of the RC cars of Crawlers use a significant T-rating motor, whereas touring cars and drift cars follow with lower T-rating motors. The below charts can give you the basic idea of the number of turns happening per RPM.

  • 3.5T means 10,500 RPM
  • 4.5T means 9,000 RPM
  • 5.5T means 7,400 RPM
  • 6.5T means 6.400 RPM
  • 7.5T means 5,800 RPM
  • 8.5T means 5000 RPM
  • 10.5T means 4,200 RPM
  • 13.5T means 3,300 RPM
  • 17.5T means 2,200 RPM
  • 21.5T means 1,800 RPM

The turns indicate the number of wrapped copper wire inside the motor. The more significant number of turns means more resistance to the motor wire. With more resistance comes lower RPMs. 

Now that you know this, you can understand that the Kv and turns are basically the same thing. Both of them are parameters for measuring the motor. Now, that you know this information you will be able to decide which one you prefer for your RC cars. If you do a small amount of off-road buggy RC car or truck usage, you will want a motor with a lower amount of turns and Kv rating for your RC vehicles. This is why you need to consider the above points to pick the correct motor for your RC car.

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Kv measures the performance of a motor. The Kv counts the motor spins when one-volt power is supplied to it. The higher Kv rating means faster motor efficiency. Like a 9000Kv motor is faster than a 2200Kv motor. 

The turns are the physical attribute of a motor that indicates the number of wrapping wire found inside the motor. The higher the amount of turn number shows you that there is more wire inside the motor with more resistance that slows down a motor. In this point of view, the turns are the opposite of Kv. For instance, a 4.5 turn motor can be considered faster than a 15.5 turn motor.

Now that you know more about KV and turns you can clearly see that although similar, when measuring for power of a motor, they are two very different measurements. The Kv is a result of the performance output. On the other hand, the turn is a physical feature of the motor. If you compare the horsepower and displacement, the fewer turns show more Kv speed rating. All the engines of the same displacement don’t provide the same horsepower. The situation is similar even to RC cars and trucks. In the same way, the two motors containing the equal number of turns don’t mean they contain the same Kv rating.

Conclusion

If you are planning on buying a new brushless motor for your car, you will want to consider the above information to make sure you buy the correct one. The 17.5 turn brushless is now considered as the standard amount of motor turns for the top RC cars. So if your car does not have 17.5, you may want to consider getting a new motor. 

Matt Robbs

I love to spend time with my wife and 3 kids. There is no better way to get them off the couch and outside than for us to grab the RC cars or boat and enjoy the sunshine!

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