Platinum-40A-ProPlatinum-40A-PRO ESC belongs to Hobbywings "Platinum" series products line, it is the most significant top-class product for aircraft and helicopter. 1 Typical Applications1.1 Super powerful for 450 and 400 class helicopter1.2 Very powerful for middle scale aircraft 2 Specification2.1 Output:Continuous 40A, burst 60A up to 10 seconds.2.2 Input Voltage:2-6 cells lithium battery or 5-18 cells NIMH battery. 2.3 BEC:Switching mode DC-DC regulator. 3A@5.25V or 3A@6V switchable by user progromming.2.4 Control Signal Transmission:Optically coupled system.2.5 Max Speed:210,000rpm for 2 Poles BLM, 70,000rpm for 6 poles BLM, 35,000rpm for 12 poles BLM. (BLM:BrushLess Motor)2.6 Size:59mm (L)*27mm (W)*12mm (H).2.7 Weight:38g. 3 Features3.1 High performance microprocessor brings out the best compatibility with all kinds of motors and the highest driving efficiency.3.2 Wide-open heat-sink design to get the best heat dissipation effect.3.3 With 3 types of start mode:Normal / Soft / Very-Soft, compatible with aircraft and helicopter. 3.4 Smooth, linear, quick and precise throttle response.3.5 The output voltage of the built-in BEC is switchable by user programming (5.25V or 6.0V).3.6 Multiple protection features:Low-voltage cut-off protection / Over-heat protection / Throttle signal loss protection3.7 Perfect governor mode for helicopter. 3.8 The firmware of the ESC can be updated through the USB adapter on the Professional LCD Program Box.3.9 User programmable. Several kinds of program methods are supported:transmitter, digital LED program card, advanced professional LCD program box, PC software. Very easy to program the ESC at home or at the flying field.