FlyFish Flash 1303.5

What it pulls

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

What you get for $12.90

• 298 g on 4S

  On FlyFishRC’s 16.8 V bench it pulled 297.8 g at full throttle on an HQ 3 × 2 × 2, drawing 12 A; on a GF 2540 × 3 it pulled 275.3 g at 11.21 A.

  Source: FlyFishRC spec sheet

• One-piece 7075 bell

  FlyFishRC’s Uni-Bell is one piece of 7075 aluminium; it says the design adds crash resistance without adding weight.

  Source: FlyFishRC product page

• NMB bearings, N52SH magnets

  NMB bearings, N52SH magnets, a titanium alloy shaft, and copper wire rated to 220 °C.

  Source: FlyFishRC product page

What to pair it with

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

ESC

FlyFishRC gives a 10-second peak of 12 A at 16.8 V. A 15 A ESC or AIO covers it. (FlyFishRC spec sheet)

Props

2.5 to 3-inch props on a 1.5 mm shaft: on 16.8 V it pulled 297.8 g on an HQ 3 × 2 × 2 and 275.3 g on a GF 2540 × 3 at full throttle. The top has four M2 holes on a 5 mm circle. (FlyFishRC spec sheet)

Battery

4S. (FlyFishRC product page)

Frame

Four M2 holes on a 9 mm circle (9 × 9 mm) and 120 mm 24 AWG leads. (FlyFishRC product page, FlyFishRC spec sheet)

Where to buy

• FlyFishRCthe maker’s store
  $12.90seen Oct 19, 2026
  Visit

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

Full specs

Bench data

Redrawn from FlyFish’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:

• Bell. One piece of 7075 aluminium (FlyFishRC’s Uni-Bell), φ17.6 mm, in silver and purple, with four M2 holes on a 5 mm circle in the top. (FlyFishRC product page, FlyFishRC spec sheet)
• Shaft. 1.5 mm titanium alloy, standing 3 mm above the bell. (FlyFishRC product page, FlyFishRC spec sheet)
• Magnets. N52SH, which FlyFishRC describes as heat resistant. (FlyFishRC product page)
• Stator. 13 × 3.5 mm with 9 slots, wound with copper wire rated to 220 °C. (FlyFishRC product page)
• Bearings. NMB. (FlyFishRC product page)
• Base. Four M2 holes on a 9 mm circle. (FlyFishRC product page, FlyFishRC spec sheet)

How fast it spins

KV is the motor’s no-load speed per volt. With nothing on the shaft, the 5500KV 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 FlyFish’s published sizes: the 13 × 3.5 mm stator, 17.6 mm bell, 11.5 mm height, 1.5 mm shaft, 9 mm mounting circle and 9 teeth and 12 magnets. Anything FlyFish 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. FlyFishRC: Flash 1303.5 5500KV FPV Motor (product page, silver and purple). Retrieved Oct 19, 2026.
2. FlyFishRC: Flash 1303.5 Motor (Silver & Purple) spec sheet: spec table, dimension drawing and test report at 16.8 V on two props (image on the product page). Retrieved Oct 19, 2026.