HappyModel EX1103

What you get

• Made for toothpicks

  HappyModel says it suits toothpick builds and rates it for 40 mm to 75 mm props.

  Source: HappyModel product page

• Two bearings

  A dual-bearing design, which HappyModel says keeps it better balanced.

  Source: HappyModel product page

• KVs from 1S to 4S

  6000KV for 3S–4S, 7000KV and 8000KV for 2S–3S, 12000KV for 1S–2S.

  Source: HappyModel product page

• Mobula8 and Bassline motor

  HappyModel sells an 11000KV version for 1S–2S as the spare motor of its Mobula8 and Bassline.

  Source: HappyModel 11000KV page

What to pair it with

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

ESC

HappyModel's bench tops out at 9.2 A (11000KV on 7.4 V), 8.3 A (12000KV on 7.4 V), 5.9 A (8000KV on 11.1 V) and 4.6 A (6000KV on 14.8 V). An ESC rated 10 A per motor covers each of them, if it takes that version's battery. (HappyModel product page, HappyModel 11000KV page)

Props

HappyModel rates it for 40–75 mm props. Its tests used a 1935 three-blade and a 65 mm two-blade prop, and a 2023R on the 11000KV. (HappyModel product page, HappyModel 11000KV page)

Battery

1S–2S for 11000KV and 12000KV, 2S–3S for 7000KV and 8000KV, 3S–4S for 6000KV. (HappyModel product page, HappyModel 11000KV page)

Frame

Three M1.4 screws on a 6.6 mm circle. (HappyModel drawing)

Where to buy

• RaceDayQuads11000KV
  price on the store’s page
  Visit
• Pyrodrone11000KV
  price on the store’s page
  Visit
• WREKD11000KV
  price on the store’s page
  Visit
• RaceDayQuads7000KV (4-hole)
  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 HappyModel’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:

• Shaft. 1.5 mm, protrudes 5.2 mm above the bell. (HappyModel drawing)
• Stator. The coils are wound on a stack of thin steel laminations: 11 × 3 mm (1103). (HappyModel 11000KV page)
• Bearings. 2 (dual-bearing design). (HappyModel product page)
• Base. 3 × M1.4 holes on a 6.6 mm circle. (HappyModel drawing)

How fast it spins

KV is the motor’s no-load speed per volt. With nothing on the shaft, the 11000KV 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 HappyModel’s published sizes: the 11 × 3 mm stator, 13.5 mm bell, 10 mm height, 1.5 mm shaft, 6.6 mm mounting circle and 9 teeth and 12 magnets. Anything HappyModel 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. HappyModel: EX1103 KV6000 7000 8000 12000 2-4S brushless motor (product page, spec list and bench tables; the tables' throttle column, in unstated units from 1298 to 2200, is left out). Retrieved Oct 19, 2026.
2. HappyModel: EX1103 KV11000 brushless motor for Mobula8/Bassline (spec list and bench data). Retrieved Oct 19, 2026.
3. HappyModel: EX1103 dimension drawing (image on the 11000KV page; the same drawing is on the 2019 page). Retrieved Oct 19, 2026.
4. HappyModel: EX1103 KV11000 main product photo, used for finish. Retrieved Oct 19, 2026.