FlahHobby Arthur A3115 900KV Brushless Motor (37.1×32 mm, 5 mm Shaft) for 9–11" FPV / Long-Range Drones

Overview

The FlahHobby Arthur A3115 900KV is a 12N14P, high-torque 3115-class motor for 9–11" FPV and long-range multirotors. It features a CNC 6061-T6 aluminum bell, precision-balanced rotor, NSK 5×11×5 mm bearings, high-temperature windings, and 16 AWG / 300 mm silicone leads. On 6S, it delivers up to 4.2 kg peak static thrust with 10" props while keeping motor case temps in the low-40 °C range.

Key Features

• 12N14P architecture for strong low-RPM torque on 9–11" props

• Precision-balanced rotor; smooth, low-vibration response

• CNC 6061-T6 bell, 5 mm solid shaft, and NSK bearings for durability

• High-temperature copper windings; low internal resistance (0.037 Ω)

• Long 16 AWG/300 mm flexible leads; easy routing on large frames

Specifications

Performance Bench Tests (Static)

Test setup notes: 6S (~25 V). Temperatures are motor surface temps at 100% throttle after 15 s; ambient 26 °C.

Prop: FH1050 (10×5.0) — Motor temp ≈ 44 °C

Prop: GF1050 (10×5.0) — Motor temp ≈ 39.1 °C

Prop: HQ1050 (10×5.0) — Motor temp ≈ 42.9 °C

Application & Prop Guidance

• Use case: 9–11" long-range quads, cruisers, aerial platforms on 6S.

• Recommended props: 9–10" (e.g., 10×5) for best thrust-to-efficiency balance.

• Build tips: Pair with a quality 60–80 A ESC, ensure cooling and verify current draw in your frame before full-throttle flights.

What’s in the Box

• Arthur A3115 900KV brushless motor ×1

Details

Flash Hobby A3115 3115 brushless motor, 900KV/1050KV/1200KV, black casing with visible copper windings and green magnets.

Arthur 43115 Motor #A# with KV9oo, I# (4%) 117g(2#8) B#LR+, 037.1x32 mm, and R@#teker. It has a 12NII4P motor, 5.Omm IIFMZEE (Lipo) battery, and 3-68 240x 1.4/10V RXbZ rating. The motor operates at 24-25°C temperature.