on my first flight with the typhoon i broke a set of rotors when i accidentally tried taking off in smart mode. the rotors aren't cheap. i found a set of prop guards on ebay for around $16. see links for black or red: 4pc x YUNEEC Q500 Snap on off Propeller blades Guards Prop Crash Protector Black and 4pcs Quick Release Snap on off YUNEEC Q500 Propeller Props Guards Blades Protect