This is a M-4215-320kv review from

This motor is from the high performance M series, is rated to over 1.1kW, and suitable for 6S to 10S LiPo packs

Scorpion M-4215-320kv motor for large UAVsPrimarily aimed at large scale UAVs (unmanned aerial vehicles) this motor can deliver over 3.6Kg of thrust using an 18×6 propeller and running on a 6S LiPo. It’s ideal for large camera platforms, typically hexacopters or octocopters, and has been designed and constructed to minimize vibration.

Outside diameter is a fraction over 2″ (51.2mm) and it’s quite squat at 1.5″ (38mm). As you might guess from the part number, it’s a 320Kv motor, suitable for propellers ranging between a 15×5 and 18×6, and the shaft is 5mm.

Maximum continuous current is 30A. This motor is wound with single strands of 1.12mm diameter wire and although there’s some discussion about the merits of single versus multiple strand winds, Scorpion must be confident that their methods are giving some gains. At only 6.8 ounces (223 gm) it’s another example of the high power to weight ratio achievable with modern motor design.

Dimensions of the Scorpion M-4215-320kv brushless motor

Modern brushless motors (BLDC) are a fascinating if somewhat nerdy subject! For those of you who would like to find out more about how they actually work, the third link below is to an informative and easy to understand (well, I thought so…) overview from Texas Instruments.

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One Response to This is a M-4215-320kv review from

  1. Mark Dollard says:

    I ordered this motor for a solar glider project as it stands out as the perfect fit for such an aircraft as all parameters meet the required specifications. Its impressive for certain but I found a couple things at issue when using the aluminum aircraft mounting plate. Firstly the three lead wires come out at the exact location of a screw hole, making it difficult to mount the motor. Secondly, the holes are very close to the can making it difficult to actually screw it to the firewall. The lead wires should be moved to another out point at the very least. Aside from this, on an 18×8 APC electric at 6s, it gives me nearly 30 ounces of thrust drawing only 4 amps. Far more than I need for endurance flying. Thank you Scorpion…

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