- #1

robax25

- 238

- 3

Hi, I have Force vs velocity graph. From the graph, I need to calculate the gear ratio of every Gear.

This is the formula what I can use to find the gear ratio,

V= 2*pi*r.n(1-i)/ε

v= vehicle speed m/s ( I consider from the graph lowest speed 3.61 m/s or 13km/h

r= radius of drive wheel

n=Engine speed ( From the graph, 5500 rev/min or 91.667 rev/s)

ε= overall gear ration( In this case, it is 0,85)

i= slippage of drive axle.

The problem is that I don't know the radius of the drive wheel. Can anybody tell me please which formula should be fit for the problem?

This is the formula what I can use to find the gear ratio,

V= 2*pi*r.n(1-i)/ε

v= vehicle speed m/s ( I consider from the graph lowest speed 3.61 m/s or 13km/h

r= radius of drive wheel

n=Engine speed ( From the graph, 5500 rev/min or 91.667 rev/s)

ε= overall gear ration( In this case, it is 0,85)

i= slippage of drive axle.

The problem is that I don't know the radius of the drive wheel. Can anybody tell me please which formula should be fit for the problem?