Product overview
The STEAM MD4025 combines a 40 mm diameter, 25 mm thick stator with 12 stator arms and 10 magnet poles. Its winding uses a 4+3 Turn Delta arrangement and two strands of 1.2 mm wire. A specially customized 5 mm shaft suits the Miao 550 helicopter. The new production batch incorporates both mounting patterns: 25 mm holes for M3 fasteners and 30 mm holes for M4 fasteners. The motor weighs 350 grams, with a 50.8 mm outside diameter, 54.5 mm body length and 90 mm overall shaft length.
The motor has a speed constant of 1100KV RPM/Volt and supports a maximum 6s LiPo battery. No-load current is 4.19 Amps at 10v, and motor resistance is 0.006 Ohms. Maximum continuous current is 100 Amp, with maximum continuous power of 2400 Watt. For five seconds, peak current reaches 130 Amps and peak power reaches 2920 Watts. Motor timing spans 5deg~12deg, while drive frequency spans 8kHz~32khz.
