AOS RC Supernova 1404 4000KV Brushless Motor

The AOS RC Supernova 1404 4000KV is a 3–4S micro motor designed by motor tester Chris Rosser and manufactured by RCinPower, supplied here as a set of four. It is built for sub-250 g cinewhoops, 3-inch freestyle quads and 4-inch micro long-range builds running 2.5–4 in props.

Key features

• Magnetic design tuned for 2.5-inch bullnose and 3-inch tri-blade props, rated by the maker at about 25% more thrust than other 1404 motors

• Thicker flux ring and fine-tuned magnet overhang add around 30% torque, which helps heavier bullnose cinewhoop props change speed quickly

• Efficiency on par with the most efficient 1404 motors despite the extra power, while the moderate KV limits heat at full throttle

• 7075 aluminium bell and base, N52H arc magnets and Japanese bearings

• Single-strand windings with insulation rated to 260°C

Specifications

• Stator size: 1404 class (maker lists 1404.5)

• KV: 4000KV

• Battery: 3–4S LiPo

• Recommended props: 2.5–4 in

• Shaft: 1.5 mm

• Mounting: 9 mm hole spacing, M2 screws

• Dimensions: Ø18.75 × 13.2 mm

• Weight: 10.2 g per motor with 3 cm leads

• Magnets: N52H arc

• In the box: 4 motors, each with a screw set

Check that your frame's motor mounts take a 9 mm M2 pattern and that your props suit a 1.5 mm shaft. On 4S, 2.5-inch bullnose props on a cinewhoop and 3-inch tri-blades on a freestyle frame are the setups this motor was optimised for.