You need four nos. of BLDC Motors for the copter.Generally BLDC motors are referred in KVs like , 850 KV , 1100 KV,1400KV ,1800KV ,..Many people new to flight get confused by brushless electric motor ratings, specifically the Kv rating thinking Kv = kilo-volts (1 kV = 1000 volts). This is not the case at all. The Kv rating of a brushless motor refers to how many RPM it turns per volt. The KV rating on a BLDC motor is equal to RPM per VOLT applied to the motor . So a BLDC motor with a KV rating of 1000 KV will spin at 1000 RPM when 1 volt is applied ,if you apply 12 volts the motor will spin at 12000 rpm .Kv = RPM per volt & not kilo voltExplanation:KV(rpm/v): 1300Max Power: 190WMax Thrust: 920 gramsWeight: 53 gramsShaft Diameter: 3.175mmShaft Length: 45mmRecommended Propeller for battery: 12×4.5 for 2S battery; 10×4.5 for 4S batteryBattery: 2S-4S Li-PoESC(A): 30AHere is a SIMPLE thrust calculation :With a 1.5 kg quad & 0.5kg payload, i.e., 2kg All-Up-Weight, you will need 2kg of thrust to defeat gravity; that’s 500g (2kg divided by 4) thrust per motor.You’ll need at least double the total weight (here it is 4 kg) of maximum thrust; div by four is 1000g thrust per motor at MAX throttle.Price range of BLDC motors – Rs.900 to Rs.1400/- each.