Scorpion SII-4020-420 Brushless Motor, Kv=420

We are proud to announce the new generation of SII-40 series motors! With the newly designed mount plate and rotor, these motors are allowed to run at cooler temperatures. The SII-40 series motors are also more powerful and more efficient than the original S-40 motors. Scorpion Competition Series Brushless Motors are built from the best materials available, and are designed to provide both quality and performance at an affordable price. Scorpion starts with high quality aluminum alloy parts that are produced on the latest CNC milling machines. These parts are then gold Electro-Coated to provide a beautiful, long-lasting finish. The stators are made with 0.20mm laminations to give maximum efficiency, and minimum Eddy current losses. The stators are epoxy coated to prevent shorts, and are wound with wire that is rated at 180 degrees C (356 F). The magnets used in Scorpion Motors are N-50EH style, which are rated for operation at 200 degrees C (392 F), making a motor that is virtually impossible to burn up in normal use. Scorpion Motors are built to last, and are backed with a 2-Year warranty against defects in materials or workmanship. For the best overall combination of Quality, Performance, and Value, use a Scorpion Motor on your next model! Click here for Scorpion SII-4020-420 Propeller Data Chart Scorpion SII-4020-420 Motor Specifications Stator Diameter 40.0 mm (1.575 in) Stator Thickness 20.0 mm (0.787 in) Number of Stator Arms 12 Number of Magnet Poles 14 Motor Wind 17 Turn Delta Motor Wire 17-Strand 0.25mm Motor Kv Value 420 RPM per Volt No Load Current @ 10v 0.91 Amps Motor Resistance (Rm) 0.034 Ohms Maximum Continuous Current 70 Amps Max Continuous Power 1500 Watts Motor Weight 288 grams (10.16 oz.) Outside Diameter 48.9 mm (1.925 in.) Shaft Diameter 5.98 mm (0.235 in.) Motor Body Length 46.15 mm (1.816 in.) Overall Shaft Length 78.40 mm (3.086 in.) Max LiPo Cell 6s Motor Timing 5deg Drive Frequency 8kHz