EDF rules.. :) | Performance is rpm related because as Arngier stated the rotors are fixed. For example a fan will make 1lb thrust at 35000 rpm. The only way to increase performance is to increase rpm. There is infinite ways to get there depending on the motor kv and voltage applied. In this example the motor supplied is a 4200kv and on 3s it will turn 35000 rpm at 70% efficiency. Going to a 3600kv and 4s will generate ~35000rpm at the same efficiency. The 3s will generate 250watts and draw 21amps the 4s will generate 250 watts and draw 16amps. Then say increasing the 4200kv motor to 4s will cause it to draw ~35amps and produce 450watts and thrust ~2lb correspondingly the 3500kv motor on 5s will generate ~500 watts and draw 28amps and thrust ~2.5lb. This is a fictitious example but close to the average 65mm system, it does show the performance change with different kv and voltage. Do not forget to use a Wattmeter to test your systems as you change variables to keep from overloading the esc/motor/battery. Eric B. |