AOS RC Supernova 1605 3900KV Brushless Motor (Set of 4)

The AOS RC Supernova 1605 3900KV is a high-output motor designed specifically for 3.5-inch freestyle quads swinging tri-blade props on 4S. Built by RCinPower on technology from the AOS Supernova 3220 speed-record motor, it produced much more thrust and a faster response than 1404 and 1804 motors on the same props in thrust-stand testing.

Key features

• 16 x 5 mm stator in a 9N12P layout, matched to 3.5-inch tri-blade freestyle props

• 13.3 g per motor, light enough for agile 3.5-inch builds

• Peak efficiency above 85% for strong punch without sacrificing flight time

• 1.5 mm shaft with a two-screw T-mount prop fitting

• 9 mm M2 mounting pattern

Specifications

• Stator: 1605 (16 x 5 mm)

• KV: 3900

• Configuration: 9N12P

• Battery: 3S-4S LiPo, optimised for 4S

• Shaft: 1.5 mm

• Mounting: 9 mm, M2 screws

• Dimensions: 20.3 mm diameter x 14.2 mm

• Weight: 13.3 g (measured with 3 cm of lead)

• Quantity: 4 motors

For 3.5-inch cinewhoops on bullnose props, AOS recommends a larger 2004-size motor instead; the 1605 is tuned for open-prop freestyle frames.