Or maybe the number in the specs is wrong because bigger props would hit each other.Then, If the distance from motors are the same than previous Phantom, then the propellers must be bigger........ to reach at 68,9cm.
Props are the same size - BUT the hubs are different so your old ones won't fit.
The number is not a model number but a size.
It indicates the prop is 9.4 inches diameter and has a pitch of 5.0 inches.
It's not the size of the hub - it's the design
http://www.rcgroups.com/forums/showpost.php?p=31289754&postcount=298
As has been said 100 times - you have to use the P3 propellers not old P2 propsThen, Can I use the Carbon Fiber reinforced propeller from DJI, with Phantom 3 ??? are compatible?? or must use a new type of propeller?