- #1

karabiner98k

- 90

- 12

I want to calculate maximum gradient ability of my car in 1st gear to reach an estimation number.

The specification of the car is as follows:

Max torque = 155 nm @ 4250 RPM

Curb weight = 1200 kg

1st gear ratio = 3.454

Final Drive ratio = 4.52941

Tire radius = 0.298 (meter)

Acceleration force in 1st gear at max torque RPM (assuming 15% drivetrain loss) = (3.454 x 4.52941 x 155) x 85 / 100 = 6917 N

Can someone please help me to calculate the maximum slope (%) my car can climb with 6917 N force? How can I calculate rolling resistance and other negative forces?

What is the formula to calculate gradient ability?

The specification of the car is as follows:

Max torque = 155 nm @ 4250 RPM

Curb weight = 1200 kg

1st gear ratio = 3.454

Final Drive ratio = 4.52941

Tire radius = 0.298 (meter)

Acceleration force in 1st gear at max torque RPM (assuming 15% drivetrain loss) = (3.454 x 4.52941 x 155) x 85 / 100 = 6917 N

Can someone please help me to calculate the maximum slope (%) my car can climb with 6917 N force? How can I calculate rolling resistance and other negative forces?

What is the formula to calculate gradient ability?

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