Originally Posted by pony klr
unfortunatly once some one allows 4200 in say stock oval they will feel compeled to buy because of the increased voltage trap a 3800 at 240 then a 4200 at 240 with a 35 amp discharge or 30 what ever and the 4200 will have more thats been around for 20 years voltage means power!
VOLTAGE DOES NOT MEAN POWER.
Power is defined as the rate of DOING WORK.
To get POWER out of a motor you have to develop TORQUE, and TORQUE is PROPRTIONAL to CURRENT, not VOLTAGE.
Every motor has a Kt constant. This constant will tell how much TORQUE the motor will develop at a certain CURRENT
Voltage means higher rpms.
CURRENT DEFINES POWER in electric motors. Without the current, you can have as much voltage as you want, yet your motor will not move.
For example: In a stock motor you only gain 3.6 RPM's / millivolt. So if you have a 1.190 battery v. a 1.200 you only gain 36 RPM /cell or 144 RPM for a 4 cell pack.
At 4.8 volts this motor will turn 17,280 RPM
At 4.76 volts the motor will turn 17,136 RPM
These are NO LOAD RPM
Assuming Kv=3.6
VOLTAGE = RPM
CURRENT = TORQUE
You need torque to get a motor to accelerate and POWER (WATTS) to keep it going.
POWER in a motor is the product of TORQUE multiplied by rotational distance per unit time (either in RPM or rad/sec) or better known as the angular velocity.
P = M x w
where:
P=Power in WATTS
M=Torque
w=angular velocity