[Pelao Daza]

Are there different types of springs and if so what do they do?

Springs come in a variety of different degrees. 90, 115, 135, 150, 180. Each type of spring puts a different tension on the brush. The most common of the springs are the 135 degree and 150 degree springs. The 135 degree springs will give you more RPM, less power, same torque and less comm wear than a 150 degree spring. The 150 degree spring will give you less RPM, more power, same torque, better results overall for stock and modified racing and more comm wear than a 135 degree spring. The 135 degree spring is the most common type of spring used.

What is a shunt wire?

A shunt wire is the wire that is part of a brush that you connect to the motor hood. This wire is made from very thin twisted strings of copper and are usually tin coated. The wires are very thin to make it as flexible as possible. This is done so that when a softer spring is used so it won't stick in the brush hood. Some brushes are even available with two shunt wires for increased power but often cause a disadvantage due to sticking.

What are brushes?

A brush is what makes contact with commutator and conducts electricity to the comm.

Should I use a brush with an eyelet or no eyelet?

If you are just beginning in RC the eyelet is probably the best way to go. The eyelet provides an easy way to change brushes. If you do decide to go with an eyelet type brush make sure is gold plated. This type of eyelet will have the best contact. If you can't make a good solder joint a screwed on eyelet is much better than a screwed on eyelet. When you become a more experienced racer then I would recommend soldering your brushes to the top of the motor hood. Just be careful to not over tin the end of the shunt wire. Try to use a smaller tip soldering iron when soldering your brushes to help not over tinning you shunt wire. Also once you have you brush in place, whether you solder or use the eyelet, make sure that the brush can move freely without sticking in the brush hood holder.

Are brushes made from different compounds?

Brushes are made from three different compounds (Graphite, Copper and Silver) each one has different characteristics depending what type of racing you are going to do.

What types of brushes are recommended for stock and what type are recommend for modified?

A brush made from a silver compound is recommended for stock. Silver Brushes also leave sludge behind that can only be removed by lathing the comm. Silver should be used for competitive racing where the last percentage of power is needed to win. A brush made from a copper compound is recommended for modified. Copper brushes don't leave behind sludge and works best with high RPM motors.

What are the main differences between the three types of brushes?

The graphite brushes are not really recommended for racing. They have the lowest comm wear, lowest brush wear, high lubrication and the lowest power. The copper brushes are recommended for modified racing. They have the medium comm wear, high brush wear, lowest lubrication and medium power. The silver brushes are recommend for stock racing. They have the least amount of resistance. The have the highest comm wear, medium brush wear, medium lubrication and highest power.

Are there different shapes of brushes for stock and modified?

Yes, stock brushes are a lay down brush they are wider than a stand up brush. The purpose of the laydown brush is to get maximum wrap around the comm to increase the RPM and are usually thicker than a modified brush. Modified or standup brushes are taller than a laydown brush.

What is timing?

A motor's timing is the position o its brushes relative to its magnets. When brushes are perfectly centered over the magnets, the motor has zero timing. When you rotate the endbell (and the brushes) in the direction in the direction opposite the motor's rotation, the timing is "advanced". When the end-bell is rotated beyond the zero-degree mark in the same direction as the motor's rotation, the timing is "retarded".

How is timing measured?

It is meaured by the degrees the brushes have been rotated away from the center position. Most motors come with a lablel that indicates the degrees and calibration marks to show where the timing is set. Even though timing refers to the position of the brushes in relation to the magnets, all motors have either a moldeded-in pointer or an endbell screw that measures timing at a "zero point". This is usually aligned exactly between the two mounting screws on the bottom of the motor can.

Can timing be advanced or retarded to far and what are the effects?

Yes, when the timing is advanced to far the amp draw and motor rpm increase, but overall efficiency and torque begins to suffer. When timing is retarded at all, the motor will run slower and hotter (which is why it's never really used!); zero timing is the lowest point at which a motor timing should be set. A good rule of thumb is that motors with 15 of fewer turns are best set with 0 to 15 degrees of advanced timing, and winds of 15 and above work with as high as 20 degrees of advance timing. If you are unsure how much timing to run, set it on the cautious side and run with less timing; your motor will run cooler, and your car will also run longer!

What is Ackermann? I know its named after someone but what does it do?

Ackerman has nothing to do with electric motors. It is a term used to describe a part of stearing geometry. Ackerman is the relationship between the angle your wheels and the center point of the curve you are navigating. When your R/C vehicle turns, the inside wheel and outside wheel will be at slightly different angles depending on how tight the "turn" is. However in an ideal situation, if you were to draw a straight line from the center of the arc or curve you are creating by driving around a corner to the center of your wheel (as veiwed from above), the wheels should be perpendicular to that line. This is adjustable on some cars and not on others. To the best of my knowledge on-road vehicles are primarily the most adjustable and the ones who use this setting the most.

What determines the number of the motor?
I have read most motors are 540, the motor's in the E Maxx are 550, why is this?
What determines the number that's given?

This is a metric size in (mm) which was introduced as a numbering system by a German motor company named Graupner. It is based on the size of a Ferrite. So if the ferrite measured 54mm it was simplified by adding a 0 behind it and then you had a 540. Some people think it is the measurement of the can which is not true.
However not in diameter in this instance, but by length. Simply put the larger motor produces more power. Due to the quality of materials, and number of windings, this isn't always the case with all motors due to different makings of materials to develop magnetic energy.

Is the number given the thickness of Laminations used?

No this is based on strickly the size of the can for the material used to fit.

Is it the more laminations the stronger the magnetic field?

Yes, the more material used creates a stronger field of transferable magnetic conversion.

Does this also make it heavier creating less revolutions?

To a degree while in starting motion, but the Magnetic current created and the revolutions creating the inertia will compensate for the mass.

Can you advance the timing Or are 550 motors significanly lower on rpms?

The best answer would be that it can be done, but the methods are hard to explain and sometimes have been proven to be false claims on behalf of those who have tried it. Some changes involved changing the comm and zapping the motor.


So are brushless motors by far the best?
*Higher rpm.
*Higher torque.
*Less maintenance.
*Longer run times.
*More adjust-ability.

Brushless motors are more powerful, durable, and efficient than brushed motors of the same size. Used in your radio controlled airplane, boat, or car, they can generate more power with longer run times.

What Is The Difference Between a Brushless Motor and Brushed motor?

A brushed motor uses stationary metallic contacts that 'brush' against moving metallic contacts. These 'brushes' are used to transfer electrical energy to coils on the rotating armature. A brushless motor consists of stationary coils and a rotating magnet that is connected to the output shaft. The coils are grouped together into phases, and an electronic motor controller powers up each coil in sequence, causing the magnet to rotate.



Informacion gentileza de Team3Six.