For FPV drones, tri-blades are the popular choice, and even bi-blades have their place... but can we make a kwad fly with only SINGLE-bladed propellers? Propellers must be balanced to be stable while spinning. Prop balancing is a common practice for RC aircraft with larger props, but its not something we usually have to think about with our 5 inch freestyle kwads. A prop with only one blade might just be impossible to fully balance...