Scorpion RS-3420 brushless motors – Full details

Following a brief introduction some days ago Scorpion Power Systems now have full details on their RS-3420 electric brushless motor available. Being a first for the company that is well known for its aircraft brushless motors, the motor sports some interesting features such as a patented screw-type rotor surface for increase flux density and maximised cooling. Also no plastic inserts are used to achieve maximum copper fill for the stator windings while high grade silicone steel and high purity copper wire allow for a high flux density and a minimal internal resistance. Other features include a CNC-machined 7075 heatsink can, sleeve-protected magnets, and a built-in temperature sensor for on-track monitoring with future Scorpion ESCs. The motors are built to comply with the IFMAR rules and are available as 4.5T to 8.5T modified and 10.5T to 21.5T stock variant.

Features:
– Patented Screw-type rotor surface to increase flux density and maximize cooling
– Built-in Cooling Fan on the rotor to increase airflow and decrease internal temperatures
– No plastic inserts are used to achieve maximum copper fill for the motor windings
– Rotor magnets are protected by a metal sleeve for maximum durability
– Built-in temperature sensors allow for on-track monitoring when used with Scorpion ESC
– 200 percent more cooling surface than other comparable motors for better heat dissipation
– The largest glued surface for the rotor, shaft and magnets of any motor in its class
– High grade Silicon Steel is used in the stator assembly for maximum flux density
– High purity copper wire is used for minimum internal resistance
– High temperature magnets are used to take the heat of competition
– Motor parts CNC machined from 7075 aerospace grade aluminium alloy

Source: Scorpion Power Systems [scorpionsystem.com]