i got q450 frame from rcdhamaca. and 750kv motor from rcelectro. i used to use 9x5 prop from rcelectro but i have broken all. the suggested prop size for that motor was 9x6

can i use rcdhamaca props

10x4.5 or 8x4.5

please replay fast

If you're learning to fly multirotors (like me), then it's pretty common to break props, so look for a good solution: APC or CF props, if available. Don't use standard electric plastic props other GWS-style props (from HK)

rcdhamaca props are out of stock. there are some on rcbazar. which type are those.

Plastic electric

ok

With beginners its very common the break props, the best solution is the extend the arms of the quad so that in the case of any crash the props are safe. I use very light weight ply's or CF plates..

actually after breaking prop we are going add that mod. i have searched most of online shops in india. i cant find apc or cf prop. maybe i missed some shops. where can i get those prop in india.

beyondtoyz.in and rotor.co.in sell APC, But i can't see any CW+CCW APCs anywhere. maybe you need to buy from outside india?

For 750kV motors you can happily mount 10x4.5 props. Agility of quad will be too much with high pitch props like 9x5 or 10x6 so just try to keep pitch low and you will be able to hover it nicely.