bikecalc

@hamgom95/bikecalc

Bicycle gear calculator.

API Documentation

Constants

aeroDrag ⇒ number

Calculate aerodynamic drag force.

gearInches ⇒ number

Calculate gear inches for drivetrain.

development ⇒ number

Calculate development of drivetrain.

gainRatio ⇒ number

Calculate gain ratio for drivetrain.

speedAtCadence ⇒ number

Calculate speed (m/s) at cadence for drivetrain.

skidPatches ⇒ number

Calculate number of skid patches for gear combination.

calories ⇒ number

Calculate estimated energy expenditure while cycling at a specific power.

power ⇒ number

Calculate power for cadence and force.

force ⇒ number

Calculate force for power and cadence.

pedalVelocity ⇒ number

Calculate linear pedal velocity from cadence.

aeroDrag ⇒ number

Calculate aerodynamic drag force.

Kind: global constant
Returns: number - Aerodynamic drag force (in N).

Param	Type	Description
Cd	number	The drag coefficient.
A	number	The frontal area (in m2).
p	number	The air density (in kg/m3).
u	number	The air velocity relative to the object (in m/s).

gearInches ⇒ number

Calculate gear inches for drivetrain.

Kind: global constant
Returns: number - Gear inches

Param	Type	Description
chainringTeeth	number	The number of teeth on the front chainring.
sprocketTeeth	number	The number of teeth on the rear sprocket.
wheelDiameter	number	The wheel diameter in meters.

development ⇒ number

Calculate development of drivetrain.

Kind: global constant
Returns: number - Development in meters.

Param	Type	Description
chainringTeeth	number	The number of teeth on the front chainring.
sprocketTeeth	number	The number of teeth on the rear sprocket.
wheelDiameter	number	The wheel diameter in meters.

gainRatio ⇒ number

Calculate gain ratio for drivetrain.

Kind: global constant
Returns: number - Gain ratio

Param	Type	Description
chainringTeeth	number	The number of teeth on the front chainring.
sprocketTeeth	number	The number of teeth on the rear sprocket.
wheelDiameter	number	The wheel diameter in meters.
crankLength	number	The crank length in meters.

speedAtCadence ⇒ number

Calculate speed (m/s) at cadence for drivetrain.

Kind: global constant
Returns: number - speed (in m/s)

Param	Type	Description
chainringTeeth	number	The number of teeth on the front chainring.
sprocketTeeth	number	The number of teeth on the rear sprocket.
wheelDiameter	number	The wheel diameter in meters.
cadence	number	Cadence (in revolutions per minute)

skidPatches ⇒ number

Calculate number of skid patches for gear combination.

Kind: global constant
Returns: number - The number of skid patches.

Param	Type	Default	Description
chainringTeeth	number		The number of teeth on the front chainring.
sprocketTeeth	number		The number of teeth on the rear sprocket.
[ambidextrous]	boolean	true	Whether the rider is an ambidextrous skidder.

calories ⇒ number

Calculate estimated energy expenditure while cycling at a specific power.

Kind: global constant
Returns: number - burned energy in kilocalories

Param	Type	Description
watts	number	produced average power over interval in watts
seconds	number	number of seconds where power was produced

power ⇒ number

Calculate power for cadence and force.

Kind: global constant
Returns: number - The power (in Watt).

Param	Type	Description
crankLength	number	The cranklength (in meters).
cadence	number	The cadence (in revolutions per minute).
force	number	The pedalforce (in N).

force ⇒ number

Calculate force for power and cadence.

Kind: global constant
Returns: number - The pedalforce (in N).

Param	Type	Description
crankLength	number	The cranklength (in meters).
cadence	number	The cadence (in revolutions per minute).
power	number	The power (in Watt).

pedalVelocity ⇒ number

Calculate linear pedal velocity from cadence.

Kind: global constant
Returns: number - The linear pedal velocity (in m/s).

Param	Type	Description
crankLength	number	The cranklength (in meters).
cadence	number	The cadence (in revolutions per minute)