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Originally Posted by Doctorpepper Airsoft NB
What is the difference between High Speed and High Torque?
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For two motors with the same apparent Power/ Wattage, one will operate a high RPM with low torque, whilst the other will operate at low RPM and high Torque. Both motors will do the same work when geared appropriately, however if a high RPM motor is over taxed and bogged down it will draw excessive current and perform poorly as its maximum work efficiency peak is exceeded. High rpm motors are commonly low pole-count inrunners with stators on the outside but newer AC controlled high torque motors (I doubt airsoft will go this route anytime soon) are more commonly high pole outrunners. The Wattage can be expressed as Horsepower 1HP =746W, which is also angular velocity multiplied by rotational force, in essence RPM x Torque. Motor RPM is expressed at kV, that means RPM per applied Volt. A 1450kV motor will spin at 1450 rpm for 1V applied. As the voltage is increased the motors RPM increases but power compression that can be modeled through finite analysis and other computer programs can be used to determine the upper limit to a motor's efficient RPM/voltage relationship. Low RPM motors operating at a higher voltage and lower current are more efficient than high rpm motors that operate at low voltages and high currents. High current flow causes loss in the form of heat and voltage drop as current passes through the wires' and conductors' resistance. Typically in an airsoft gun you want high torque, but you might also want higher rpm for increased fire rate without changing your pack. An option here would be to employ a slightly higher RPM motor. If the motor in your gun is a 480 series can motor rated for 1400kV, you could consider a 1600kV variant but I wouldn't jump the gun to a 2200kV unless it's designed for higher power and the pack is appropriately rated. With this information in hand it can help you choose motors to fit the rate of fire you desire for the battery you can fit in your AEG.