I'm just getting into quads and practising on my terrace has resulted in some minor crashes and broken props. Most broken props resulted from running into the walls sideways when the wind is strong.
I've put together a simple prop guard which works well for walls. Used bamboo skewers, zipties and ice cream sticks with hot glue wherever needed. Also added foam padding to the legs for hard landings. A lost model buzzer has also been added in case of landings in tall grass.
Weight of quad with 4s 2700mah battery prior to mods was 1076gm. Weight after mods is 1119gms. Mods added 43 grams. I may add thick monofilament fishing line connecting the ice-cream sticks to help with trees and branches etc.
Simple and lightweight propeller guard for quad
Simple and lightweight propeller guard for quad
Buzzer
Simple and lightweight propeller guard for quad