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PLATINUM 4120 series motors are high-performance brushless 14-pole outrunner electric motors with excellent electrical properties, sophisticated design and top-notch manufacturing. Hardened steel shafts and high-quality bearings ensure long service life, while the high-quality materials used for the stator and rotor also guarantee excellent performance parameters and high efficiency. They are low-speed motors with high torque, capable of handling large diameter propellers and high pitch without the need for a gearbox.
Engine designation system: xxYY SL-zzzz
xx - stator diameter in mm
YY - stator length in mm
SL - sensorless (SensorLess) engine
zzzz - number of revolutions per volt (rpm/V), "KV"
PLATINUM 4120SL-250KV
PLATINUM 4120SL-250KV is a brushless motor designed to power models with a flight weight of up to 4000 g, powered by a twelve-cell LiPo battery.
Motor mounting: PLATINUM 4120SL-250KV is designed for both front and rear mounting. For front mounting behind the motor face, use four M4 screws that extend into the motor face by a maximum of 5 mm. The mounting screw holes in the motor face are spaced at regular 90° intervals on a 30 mm diameter circle. The motor bulkhead should be made of 5-8 mm aircraft plywood. A rear mounting kit (mounting cross, propeller carrier for rear mounting) is supplied with the motor.
The motor kit includes: PLATINUM 4120SL-250KV brushless motor with cables with soldered 4 mm gold-plated connectors, rear mounting kit, instructions.
| Powering LiXX cells | 12 |
| Revolutions per volt [rpm/V] | 250 |
| Max. power (30 s) [W] | 2452 |
| Internal resistance [mOhm] | 64 |
| No-load current (at 44.2 V) [A] | 1.4 |
| Max. peak current (30 s) [A] | 55.3 |
| Diameter [mm] | 49.5 |
| Length [mm] | 50.3 |
| Total length [mm] | 72.3 |
| Shaft diameter [mm] | 6 |
| Weight [g] | 309 |
| Number of poles | 14 |
| Timing [°] | 15 - 25 |
| HV regulator [A] | 130 - 180 |
| Recommended propeller (12S) | 15x6”, 15x8”, 16x6”, 16x8 |
