!!Our inhouse "big block" now has gone low-KV!!
Check the numbers for 12 inch Props - @ full throttle, efficiency is still 3.5!, and will dish out over 40N (4kg) of thrust with less than 50 Amps. Now if that doesn't sound promising for some efficient 10" /12-inch-build..
Pro version : clip replaced by screw
price for 5motors ( 5pack)