Power Required Calculator v0.99 Beta
This will calculate how much power (watts) and amps is needed to go a certain speed in a specified amount of time. This will also calculate the motor KV necessary and RPM necessary. When the form is submitted, a new window will open and results will be in the first line of the table.
Allow pop-ups in your browser.
Note: This calculator can be used in tandem with
this
brushless speed caculator. This javascript/HTML calculator is used to find the
approximate
maximum speed of your Brushless Motor powered R/C vehicle.
RC Monster has added
this "power calculator
" to its list of rc tools. Check it out
here.
Target speed (mph)
*
Vehicle Weight (lb)
*
Vehicle Width (in)
*
Vehicle height (in)
*
Pinion size
*
Spur size
*
Transmission ratio
*
Default transmission ratio is 1:1. If your vehicle has a transmission, enter its drive ratio here. i.e. a Team Associated TC4 has a transmission ratio of 2.5.
Tire Diameter (in)
*
Drag coefficient
*
Drag coefficient for cars ranges from 0.25 (very aerodynamic) to 1.20 (not very aerodynamic). Most high performance cars are around 0.35.
Configuration
*
4wd
2wd (with transmission)
2wd (direct drive)
Number of Cells
*
Voltage per cell
*
Li-po cells have a nominal voltage of 3.7v/cel. Under severe load, li-po's voltage can go down to as low as 3.0v/cell (such as a speed run).
Time to get to top speed (s)
*
Electrical Efficiency
*
Efficiency of electrical system as a percent. Power is lost due to electrical resistance in wires and connectors. Inputs can be from 0 to 1. High quality motors have an efficiency of 0.85 or higher. An efficiency of 1.0 (100%) means that all electrical power is converted into motion without heat loss or friction losses, which is impossible.
Transmission Efficiency
If results table does not open in a new window after the form has been successfully submitted, click
here
to access the table
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