3 wheeler wrote
If you use 2 motors dos this increase the continuous rating speed
2 motors in itself will not increase your MAXIMUM speed. It can increase your acceleration.
Speed is a function of the number of revolutions per minute, adding another motor does not increase this. The exception is if your motor is underpowered and can never get up to its max speed. What adding another motor will do is increase the amount of available power and therefore your acceleration, it also increases your power usage.
That being said every motor is different. One 11kw motor with a max speed of 6000 RPM will give you a higher speed than 2 x 8kw small motors with a max speed of 3000RPM but the 2 8kw motors will give you a lot more power.
Conversely a single 11kh motor with a max speed of 3000rpm will give you more power than 2 x 4kw motors with a max speed of 6000rpm but less speed.