AOS Supernova 1605

What it pulls

AOS’s own bench test, one line per prop. Drag across the chart to move the throttle; the model above follows.

What you get

• Made for 3.5-inch tri-blades on 4S

  AOS RC optimised the 1605 to drive 3.5-inch freestyle tri-blades on 4S, and points 3.5-inch cinewhoops with bullnose props to larger 2004 motors.

  Source: AOS RC design page

• Up to 863 g on 4S

  On RCinPower’s 16 V bench it pulled 747 g at full throttle on an HQ T90RMM*3 and 863 g on a GF 4024*2.

  Source: RCinPower datasheet

• Built on the Supernova 3220

  AOS RC says the 1605 uses the design work behind its Supernova 3220, with thousands of finite element simulations; AOS RC adds that it is lighter than the 3.5-inch motors it competes with, for sub-250 g builds.

  Source: AOS RC design page

• Throttle expo suggested

  AOS RC suggests Betaflight throttle MID 0 and EXPO 0.20 to start, for finer control at low throttle.

  Source: AOS RC design page

What to pair it with

Our reading of AOS’s numbers, so your build matches what the motor was tested with.

ESC

RCinPower’s max current is 38.5 A, reached on a GF D90*5 at 16 V; on the HQ T90RMM*3 it drew 33.3 A at full throttle. (RCinPower datasheet)

Props

AOS RC built it for 3.5-inch tri-blades. At 16 V full throttle RCinPower measured 747 g on the HQ T90RMM*3, 768 g on the GF D90*5 and 863 g on the GF 4024*2. (AOS RC design page, RCinPower datasheet)

Battery

4S; rated 3S–4S. (AOS RC design page, RCinPower datasheet)

Frame

Four M2 holes on a 9 × 9 mm pattern. (RCinPower datasheet)

Where to buy

• GetFPV3900KV
  price on the store’s page
  Visit

Plain links, not affiliate links. Prices change; the store’s page has the current one.

Full specs

Bench data

Redrawn from AOS’s test reports. Thrust is static pull on a bench, more than you get in flight. Power is volts × amps; efficiency is thrust divided by power.

Inside the motor

A brushless outrunner: the coils stand still in the middle and the magnets spin around them. From the top down:

• Design. Designed by AOS RC and made by RCinPower. (AOS RC design page)
• Prop mount. A 1.5 mm shaft, with four M2 holes in the top of the bell, 5 mm apart. (RCinPower datasheet)

How fast it spins

KV is the motor’s no-load speed per volt. With nothing on the shaft, the 3900KV version reaches about these speeds; a prop loads the motor and brings it down, typically to around 70–75% of these figures at full throttle.

A 12-pole rotor has 6 pole pairs, so every turn of the shaft is 6 electrical cycles, and a six-step ESC switches the phases 36 times per turn.

About the 3D model

A generic outrunner drawn from AOS’s published sizes: the 16 × 5 mm stator, 20.3 mm bell, 14.2 mm height, 1.5 mm shaft, 9 mm mounting circle and 9 teeth and 12 magnets. Anything AOS doesn’t publish is typical for a motor this size, and the bell’s spoked top, the base and the inside are a generic design, not this motor’s. The colours are read off the maker’s product photos. There are no logos or markings: it is our drawing, not the maker’s.

Sources

1. AOS RC: AOS Supernova 1605-3900KV (design page, listed among AOS RC’s older designs, with a render of the motor). Retrieved Oct 19, 2026.
2. RCinPower: AOS 1605-3900KV datasheet (spec table, dimension drawing and bench tables at 16 V on three props; PDF linked from AOS RC’s page). Temperatures are after 3 s at full throttle; RCinPower marks the GF D90*5’s 85 °C as hot.. Retrieved Oct 19, 2026.