Where:
100 = A constant expression percentage grade and inches
T = Motor torque in lb inches
R = Overall gear reduction including both axle and transmission
r = Rolling radius of loaded driving type in inches
GVW = Gross vehicle weight in pounds
RR = Rolling resistance expressed in percentage grade.
Example:
What percentage grade can be negotiated by a vehicle having a hydraulic
motor torque of 1000 lb inches, an overall gear reduction in high of 12
to 1, a tyre rolling radius of 15 inches and a gross vehicle weight of
10,000 lbs driving over good concrete?
Where:
10200 = Factor
T = Motor torque in newton metres
R = Overall gear reduction including both axle and transmission
r = Rolling radius of loaded driving type in millimetres
GVW = Gross vehicle weight in kilograms
RR = Rolling resistance expressed in percentage grade.
Example:
What percentage grade can be negotiated by a vehicle having a hydraulic
motor torque of 117 Newton metres, an overall gear reduction in high of
12 to 1, a tyre rolling radius of 400 mm and a gross vehicle weight of
4,500 kg driving over good concrete?
G = 6.5% grade