Electric motor Foxy G2 C4120-750

Product detailed description

FOXY G2 motors are high-performance brushless (AC, "brushless") fourteen-pole electric motors with a rotating shell ("outrunner") with excellent electrical properties, sophisticated design and top manufacturing processing. The hardened steel shaft and high-quality bearings ensure a long service life, the quality materials used on the stator and rotor guarantee excellent performance parameters with high efficiency. They are low-speed motors with high torque that can handle large diameter propellers without the need for a gearbox.

Power supply - LiXX 4 - 8
Speed ​​per Volt [rpm/V] - 750
Number of turns - 5
Max. power (180 s) [W] - 1480
Internal resistance [mOhm] - 20
No-load current (at 10 V) [mA] - 2500
Current at max. efficiency (?>80%) [A] - 7 - 35
Max. peak current (180 s) [A] - 67
Diameter [mm] - 49.5
Length [mm] - 49
Shaft diameter [mm] - 6
Weight [g] - 292
Number of poles - 14
Timing [°] - 15 - 25
Recommended controller [A] - 80 - 90
Glider up to weight [g] - 3800
Trainer up to weight [g] - 3500
Acrobat up to weight [g] - 2800
3D acrobat up to weight (g) - 2500

Recommended propeller:
4S: 16x10”
6S: 14x8"
8S: 13x6.5"

Motor kit includes: C4120-750 motor with cables with 4 mm gold-plated connectors, fixed-wing propeller, rear mounting kit, instructions.

The "AC" electric motor commonly referred to by modelers is actually a misnomer, because it does not use alternating current, as we have at home in the 230V network. A more correct designation should be a DC brushless electric motor with electronic commutation. They are often referred to as BL DC motors. (from the English BrushLess - carbon-free...).

A classic DC commutator electric motor is very reliable, but its weakness is the use of commutation, which occurs by sliding contact between the brushes - carbons and the commutator on the rotor. It wears out and with poor maintenance or overloading, the life of the motor is significantly shortened. With electronic commutation, this problem disappears. The design of a brushless electric motor is basically reversed, the rotating parts are replaced. The BL DC motor has a fixed stator winding and rotates an exciter consisting mostly of permanent magnets. It is not enough to simply supply voltage to such an electric motor, a control unit is needed that switches the individual stator windings (replacing the commutator). The information from the feedback is processed by a microprocessor that also controls other activities so that the motor works properly. In model making, such an electric motor is controlled by an electronic speed controller (ESC), in which various values ​​​​of the necessary functionality of the electric motor can usually be set and programmed (direction of rotation, start-up, brake, etc.)

Electric motors currently use modern magnets that have significantly stronger magnetic properties. So even with a smaller and lighter design, they provide much higher power than classic commutator motors. Most of these motors are also referred to as "Outrunner", in a classic arrangement with a rotating casing. They have found use in RC models of airplanes, helicopters, drones. In car and boat models (but also aircraft models), these motors are used hidden in the outer casing, they look similar to commutator motors, but have three power wires. They are referred to as "Inrunner".

When combining individual "AC" motors with controllers, it is good to maintain a certain compatibility, not every motor works with any controller. It is advisable to follow the manufacturer's recommendations and it is ideal to use the motor and controller of the same brand and model series. This guarantees compatibility and trouble-free operation. Motors are divided mostly according to size and use and have a recommended operating power supply range, which must be combined with the corresponding power-built controller. For beginners, the choice is made easier by the option to buy a set of motor + controller, which are in the ideal combination. These sets are usually referred to as "Combo Set".

The installation of an Outrunner type motor can be of two types. Either classic, when it is mounted on the motor bulkhead behind the stator and the propeller (or other output) is mounted on the shaft in a classic way, or the so-called inverted assembly (also called the necessary parts for mounting the motor), when the motor is mounted in an inverted position and a special carrier is attached to the rotor, on which the propeller (or other output) is mounted. The assembly depends on the model design.

These electric motors currently represent the cutting edge in the field of electric drives and, with their properties, have almost completely replaced classic commutator electric motors in some industries (e.g. aircraft modeling).