Interesting spec.
Description:-
-Outside Diameter: 128.2mm
-Rotor Diameter: 119.2mm blade
-Meterial: carbon fiber reinforced Nylon rotor
-Suitable motor 530KV-650KV for 12S
-Shaft adaptor to motor: 8mm
-Max RPM 28000RPM
I did a few quick calc's for 12S + 650Kv motor
12 x 4 (volts under load) = 48V
Motor Off load rpm, 48 x 650 = 31,200 rpm
Loaded rpm 70% (keeps it near peak efficiency) 31,000 x .7 = 21,840 rpm
21,840 rpm seems pretty slow for a ducted fan, so not for Fast Jets
Static Thrust should be good plenty of acceleration for Take off
Efficiency should also be better than the higher rpm (less blades) models.
All theory of course , I could be totally wrong