Propeller guards are a necessity if you plan on flying indoors, allowing you to simply bounce off walls. ... Propeller guards also increase drag, which can have an impact on flight speed and acceleration time.

Do propeller guards work?

Tests have proven that propeller guards do not reduce a boat's acceleration, turning radius, or ability to hold a course. ... Specific performance criteria, including acceleration, turning radius, holding a course in forward and reverse, emergency braking and boat speed, were evaluated.

What is the purpose of a prop guard?

1. To protect the propeller and gear box from damage in the event of a prop striking a rock or other hard object. 2. To protect a person in the event they come into contact with a moving propeller.