RC Propeller APC AP0634 6.3x4 (15 COMBAT) Replacement for Electric Models  [AP0634]

6.3 x 4 Prop Details and Fitting

The APC AP0634 PROPELLER 6.3x4 (15 COMBAT) is built for use as a spare or a tuning prop on electric model aircraft and like-for-like RC applications. The diameter and pitch numbers define how the prop will perform in terms of thrust and speed.

Installation typically involves removing the spinner or nut, locating the hub onto the motor shaft or adapter, tightening the original fastening device, and checking clearance with the fuselage and control surfaces. Verify secure seating and correct torque before any powered runs.

In practice, a 6.3x4 tends to boost low-end thrust while reducing maximum speed potential, making it useful for better climb and control at lower speeds. When testing new props, monitor motor and ESC temperatures and ensure the prop is balanced to avoid excess vibration.