HPI Racing for the ultimate combination of speed, efficiency, and easy maintenance, equip your 1/10 scale car, truck or buggy with the HPI Flux Brushless System. Now available in a convenient package that includes the powerful Warp 5700Kv brushless motor and the Motiv brushless electronic speed controller (ESC), this is the easy way to experience the speed and power of the newest brushless technology!

Warp 5700 Motor features

* Powerful, high-speed brushless motor
* Same size as a standard 540 motor
* Sleek aluminum casing
* Low maintenance design
* External solder tabs for easy wire replacement
* Precision ball bearings for long life
* Sintered Neodymium rotor
* 6-point mounting for convenient installation
* Longer run times than a comparable brushed motor

Flux Motiv ESC features

* Compatible with 6 to 7 cell NiMH batteries or 2S LiPo (8.4 volt)
* Programmable low-voltage cutoff
* Proportional braking for great control
* Reversible (with programmable reverse lock-out for racing)
* Small size: 46 x 36 x 23mm (1.8"L x 1.4"W x 0.9"H)
* Light weight: 62.4 g (2.2 oz)
* Authentic Dean's battery plugs
* Durable on/off switch
* Simple initial programming
* Ability to easily adjust ESC parameters with Castle Link (not supplied)

Upgradeable!
Flux Motiv owners can update their ESCs with a convenient computer link and free software download! Programmers are constantly making updates to the software loaded onto the Flux Motive ESC, and you can keep up with them by getting the Castle Link USB Programming Kit. This kit allows you to connect your ESC directly to your Windows PC to save profile settings, customize racing profiles, update the ESC software and more!

Note: The term Kv refers to the number of RPMs that the motors will try to deliver per volt applied, and is a standard term for brushless motor power.
Warp 5700Kv motors and Motive ESCs are also available separately so you can hop up more vehicles!

To know why brushless motors are so efficient and powerful, it helps to know how standard brushed motors work. In a conventional RC electric motor, such as what you find in the Sprint 2 car or E-Firestorm truck, you'll find two wires (positive and negative) that connect to specific points in the endbell of the motor, two curved permanent magnets inside the case or 'can' of the motor, and a spinning shaft with wires wrapped around it that goes down the centre of the motor can. The shaft and the wires together are known as the 'armature' of the motor, and at one end is where the motor pinion gear is attached - at the other end is a copper section, this is called the 'commutator'. The wires that come from the ESC bring power to the brushes, which physically contact the commutator, turning the armature into a basic electromagnet when electricity is applied.

When an electromagnet has power applied to it, one end becomes the north 'pole' and the other becomes the ‘south' pole. Because the north pole of any magnet is automatically repelled from the north pole of another magnet, the motor armature will want to spin so its north pole is facing the south pole of the permanent curved magnets mounted inside the motor can. As the armature spins around to make the north/south poles meet, the electrical charge applied to the armature flips, so the poles are again repelled from each other and they make the armature spin, turning the pinion gear and your car or truck's transmission. Most electric motors have three poles instead of two - this prevents the battery from shorting out, lowering efficiency, and it also prevents the motor from getting stuck in one position.

The restrictions of brushed motors are made clear when you need to get huge amounts of power and speed from them. Because the brushes must remain in physical contact with the commutator at all times, there is significant friction from them, especially at high speeds. Any imperfection in the commutator makes the brushes bounce and lose contact, making the motor less efficient. This is why racers true the commutator of their race motors after nearly every run, and change the motor brushes almost as often. There is also significant electrical noise generated by the inefficient circuits, and the commutator and brushes eventually wear out, requiring replacement of parts of the motor, or the entire thing.

The basic explanation of a brushless motor's construction is that it is similar to a brushed motor, except everything is 'inside out' and there are no brushes at all. The permanent magnets that would wrap around the armature in a normal motor are instead placed around the motor shaft, and this assembly is called the rotor. The wire coils are around the inside of the motor can, making several different magnetic poles. A computer (the electronic speed control designed for brushless motors) handles the power getting to the wire coils, turning them into electromagnets as in a brushed motor.

Other than the ball bearings the rotor spins on, there is no physical connection at all, automatically making the brushless motor more efficient and longer-lasting because there is no friction of the brushes and commutator. Having a computer (the ESC) control the rotation of the rotor also vastly increases efficiency. There's no sparking from brushes to commutator, and the coils are much easier to keep cool, again boosting efficiency.