kawasaki9r
Member
I'd just say...until there is a problem. I thought the same thing as you until a prop flew of my JJRC X5 and it then came crashing down onto the ground. Drones can't fly with 3 props (or less) so losing one means a much more expensive repair than replacing a prop or 2.The only time you need to replace your prop is when they are cracked. I've been flying my drone with scratches on then for months without any problems
My experience was documented in a prior post