RE: AXI4120/14 equivelent????
Kt ("K" sub "T") is the torque constant. Kv=X RPM/Volt (Revolutions per Minute per Volt, Kt=X Nm/A (Newton Meters per Amp), R= X Ohms, L=X henrys
Without all four values predicting motor performance accurately is difficult to impossible.
I have 2 4120 motors both have a Kv of 480RPM/V. One turns a 12X6 with an input of 800 watts and stays cool the other, 900 watts at a lower rpm and gets hot. One was $45 the other $120. The Axi has 30% more Kt than the no-name motor. BTW, the cheap motor works great with a 12X4 prop at 600 watts.