Drawbar Pull Solution

STEP 0: Pre-Calculation Summary
Formula Used
Drawbar Pull = (Torque Generated*Overall Gear Reduction*1000)/Rolling Radius of Loaded Driving Tire-Rolling Resistance at Wheel
Dp = (Tg*RGear*1000)/r-Fr
This formula uses 5 Variables
Variables Used
Drawbar Pull - (Measured in Newton) - Drawbar Pull is defined as the force acting on the driving axle excluding the rolling resistance.
Torque Generated - (Measured in Newton Meter) - Torque Generated is defined as the torque derived from the engine working at the crankshaft.
Overall Gear Reduction - Overall Gear Reduction is defined as a mechanical system of gears in an arrangement such that input speed can be lowered to a slower output speed but have the same or more output torque.
Rolling Radius of Loaded Driving Tire - (Measured in Meter) - Rolling Radius of Loaded Driving Tire is defined as the radius of loaded driving tire.
Rolling Resistance at Wheel - (Measured in Newton) - Rolling Resistance at Wheel is defined as the force that resists the motion of a wheel rolling on a surface or ground.
STEP 1: Convert Input(s) to Base Unit
Torque Generated: 115 Newton Millimeter --> 0.115 Newton Meter (Check conversion here)
Overall Gear Reduction: 10 --> No Conversion Required
Rolling Radius of Loaded Driving Tire: 0.4 Meter --> 0.4 Meter No Conversion Required
Rolling Resistance at Wheel: 21 Newton --> 21 Newton No Conversion Required
STEP 2: Evaluate Formula
Substituting Input Values in Formula
Dp = (Tg*RGear*1000)/r-Fr --> (0.115*10*1000)/0.4-21
Evaluating ... ...
Dp = 2854
STEP 3: Convert Result to Output's Unit
2854 Newton --> No Conversion Required
FINAL ANSWER
2854 Newton <-- Drawbar Pull
(Calculation completed in 00.020 seconds)
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Ramaiah University of Applied Sciences (RUAS), bangalore
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14 Driveline Calculators

Angular Acceleration of Driven Shaft
Go Angular Acceleration of Driven Shaft = -Angular Velocity of Driven Shaft^2*cos(Angle between Driving and Driven Shafts)*sin(Angle between Driving and Driven Shafts)^2*sin(2*Angle Rotated by Driven Shaft)/((1-cos(Angle Rotated by Driven Shaft)^2*sin(Angle between Driving and Driven Shafts)^2)^2)
Velocity Ratio of Hooke's Joint
Go Velocity Ratio = cos(Angle between Driving and Driven Shafts)/(1-(cos(Angle Rotated by Driving Shaft))^2*(sin(Angle between Driving and Driven Shafts))^2)
Percentage Gradeability of Vehicle
Go Gradeability of Vehicle = (10200*Torque Generated*Overall Gear Reduction)/(Rolling Radius of Loaded Driving Tire*Gross Vehicle Weight)-Percentage Rolling Resistance
Axial Force of Multiplate Clutch using Uniform Wear Theory
Go Total Axial Load = pi*Pressure of Intensity*Inner Diameter of Friction Disc*(Outer Diameter of Friction Disc-Inner Diameter of Friction Disc)*0.5
Aerodynamic Resistance
Go Aerodynamic Resistance of Vehicle = 0.5*Density of Air*Frontal Area of Vehicle*Cruising Speed of Vehicle^2*Coefficient of Drag Exerted by Flow
Drawbar Pull
Go Drawbar Pull = (Torque Generated*Overall Gear Reduction*1000)/Rolling Radius of Loaded Driving Tire-Rolling Resistance at Wheel
Power Required to Propel Vehicle
Go Power required to Propel a Vehicle = (Total Resistance on Vehicle*Speed of Vehicle in Meter per Second)/Transmission Efficiency of Vehicle
Weight on Rear Axle
Go Weight on Rear Axle = (Total Weight being Distributed of Vehicle*CG Distance from Front Axle)/Wheelbase of Vehicle
Total Resistance on Vehicle
Go Total Resistance on Vehicle = Aerodynamic Resistance of Vehicle+Rolling Resistance at Wheel+Gradient Resistance
Effective Gear Ratio
Go Effective Gear Ratio = Old Tire Diameter/New Tire Diameter*Gear Ratio of Transmission
Weight on Front Axle
Go Weight on Front Axle = Total Weight being Distributed of Vehicle-Weight on Rear Axle
Engine Torque
Go Engine Torque = (9.55*Power required to Propel a Vehicle)/Engine Speed in rpm
Gear Step
Go Gear Step = Preceding Lower Gear Ratio Number/Gear Ratio Number
Final Drive Ratio
Go Final Drive Ratio = Rear Gear Ratio*Overdrive Ratio

Drawbar Pull Formula

Drawbar Pull = (Torque Generated*Overall Gear Reduction*1000)/Rolling Radius of Loaded Driving Tire-Rolling Resistance at Wheel
Dp = (Tg*RGear*1000)/r-Fr

What is the drawbar pull on the driving axle?

The torque on the driving axle creates a force between the tyres and the road which is used to propel the vehicle. This gross force is termed the tractive effort and the net force, that is, gross force minus rolling resistance is the drawbar pull.

How to Calculate Drawbar Pull?

Drawbar Pull calculator uses Drawbar Pull = (Torque Generated*Overall Gear Reduction*1000)/Rolling Radius of Loaded Driving Tire-Rolling Resistance at Wheel to calculate the Drawbar Pull, The Drawbar pull formula is defined as the net force acting on the driving axle neglecting the rolling resistance on the wheels. Drawbar Pull is denoted by Dp symbol.

How to calculate Drawbar Pull using this online calculator? To use this online calculator for Drawbar Pull, enter Torque Generated (Tg), Overall Gear Reduction (RGear), Rolling Radius of Loaded Driving Tire (r) & Rolling Resistance at Wheel (Fr) and hit the calculate button. Here is how the Drawbar Pull calculation can be explained with given input values -> 2854 = (0.115*10*1000)/0.4-21.

FAQ

What is Drawbar Pull?
The Drawbar pull formula is defined as the net force acting on the driving axle neglecting the rolling resistance on the wheels and is represented as Dp = (Tg*RGear*1000)/r-Fr or Drawbar Pull = (Torque Generated*Overall Gear Reduction*1000)/Rolling Radius of Loaded Driving Tire-Rolling Resistance at Wheel. Torque Generated is defined as the torque derived from the engine working at the crankshaft, Overall Gear Reduction is defined as a mechanical system of gears in an arrangement such that input speed can be lowered to a slower output speed but have the same or more output torque, Rolling Radius of Loaded Driving Tire is defined as the radius of loaded driving tire & Rolling Resistance at Wheel is defined as the force that resists the motion of a wheel rolling on a surface or ground.
How to calculate Drawbar Pull?
The Drawbar pull formula is defined as the net force acting on the driving axle neglecting the rolling resistance on the wheels is calculated using Drawbar Pull = (Torque Generated*Overall Gear Reduction*1000)/Rolling Radius of Loaded Driving Tire-Rolling Resistance at Wheel. To calculate Drawbar Pull, you need Torque Generated (Tg), Overall Gear Reduction (RGear), Rolling Radius of Loaded Driving Tire (r) & Rolling Resistance at Wheel (Fr). With our tool, you need to enter the respective value for Torque Generated, Overall Gear Reduction, Rolling Radius of Loaded Driving Tire & Rolling Resistance at Wheel and hit the calculate button. You can also select the units (if any) for Input(s) and the Output as well.
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