29 lines
984 B
Python
29 lines
984 B
Python
from math import pi, sin, atan, degrees
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# Configurable variables
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power = 140
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cadence = 75
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crankarm_length = 0.1725
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total_mass = 85
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slope = 0.2
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tire_circumference = 2.105
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# Calculated values
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circumference = crankarm_length * 2 * pi
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pedal_speed = circumference * (cadence / 60)
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pedal_force = power / pedal_speed
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slope_radians = atan(slope)
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slope_degrees = degrees(slope_radians)
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gravity_force = total_mass * 9.80665 * sin(slope_radians)
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pedal_torque = pedal_force * crankarm_length
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wheel_radius = tire_circumference / (2 * pi)
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wheel_torque = gravity_force * wheel_radius
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gear_ratio = pedal_torque / wheel_torque
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speed = (cadence / 60) * tire_circumference * gear_ratio
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print(f"[{power} W] Desired pedal average force: {pedal_force}N - Desired cadence: {cadence} rpm")
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print(f"Incline/Slope: {slope} - {slope * 100}% - {slope_degrees} degrees")
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print(f"Slope force down: {gravity_force}N")
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print(f"Required gear ratio: {gear_ratio}")
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print(f"Speed: {speed} m/s - {speed * 3.6} km/h")
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