The Bench

Buying propellers for a whoop

Props are the part you'll replace most. Match the diameter to your ducts and the shaft size to your motors, and keep spares in the bag.

Check before you buy

• Diameter that fits your ducts (31 mm, 40 mm or 45 mm).
• Shaft hole that matches your motor shafts (usually 1 mm or 1.5 mm).
• 2-blade for efficiency and flight time, 3-blade for grip and control.

Why does my whoop flip on takeoff?

Usually props on the wrong motors or motors spinning the wrong way. Check prop direction against Betaflight's motor order.

How often should I replace props?

As soon as one is chipped or bent. A damaged prop causes vibration, hot motors and jello in the video.

Go deeper

• How to pick whoop props
• How to change FPV drone props
• How to check FPV motor direction