APC AP04540 PROPELLER 4.5x4 (1/2A PYLON/COMBAT)  [AP04540]

Replacement propeller for 1/2A pylon/combat models

This APC AP04540 propeller is an RC-scale replacement part sized and labeled for 1/2A pylon and combat class aircraft. It serves as a direct spare for hobbyists who need a quick swap during practice or local events, preserving the model's handling characteristics when fitted to compatible small electric sport models.

Fit and basic installation are straightforward: remove the spinner or nut securing the original prop, inspect the hub and shaft for wear or damage, mount the prop concentrically, and secure with the original hardware using proper torque for your prop nut or spinner. After mounting, perform a static balance check and a short low-throttle run to confirm there are no unusual vibrations before full-power flight.

On tuning and setup, this propeller is typically used when experimenting with thrust versus responsiveness on lightweight pylon-style aircraft. When changing to this size, re-check your motor and ESC temperature during the first runs and verify ground handling and stall behaviour in a safe test area. Balance and alignment have the largest effect on vibration and control feel, so address those first before adjusting motor timing or battery selection.