When to change props ?

[povlhp]

When is the right time to change props ? Mine has been hitting trees twice, once I needed to tool to remove. It has cut a little grass/weed on takeoff/landing.

They a lll look fine, but with a bit of colour, and I don't feel bad about structural integrity. So when do I need to change props ? When they break ? When they are visible damaged ? Or what is the rule of thumb ?

 

[Doono]

When they are visibly damaged.

Fly away from obstacles for a while, if you keep hitting things, you'll loose your camera. (They are delicate).