Power 25 Brushless Outrunner Motor 870KV (EFLM4025A)

The Power 25 Brushless Outrunner Motor is a compact, high-torque powerplant designed to replace a 25-size glow engine in sport and scale RC aircraft. It delivers clean, quiet power for models weighing roughly 3 to 5.5 pounds, and it's also suitable for 15-size 3D airplanes up to about 3.5 pounds. The motor features an external radial rotor design with a reversible 6 mm shaft for flexible mounting, a slotted 14-pole outrunner, and durable construction that includes ball bearings and a hardened steel shaft. The package includes a mount, prop adapter, and mounting hardware to simplify installation.

For setup, pair it with a 40–45A brushless ESC and a 3S–4S Li-Po (or 10–14 cell Ni-MH/Ni-Cd) battery and drive an 11x8 to 14x7 prop. With up to about 600 watts of power, the Power 25 provides smooth, lightweight, and quiet propulsion, making it a reliable direct-drive option for mid-size sport and scale aircraft or 4–5 pound scale builds.