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Drawbar Pull Formula

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Drawbar Pull is defined as the force acting on the driving axle excluding the rolling resistance. Check FAQs

Dp = \frac{T g \cdot R g \cdot 1000}{r} - F r

Dp - Drawbar Pull?T_g - Torque Generated?R_g - Overall Gear Reduction?r - Rolling Radius of Loaded Driving Tire?F_r - Rolling Resistance at Wheel?

Drawbar Pull Example

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Here is how the Drawbar Pull equation looks like with Values.

Here is how the Drawbar Pull equation looks like with Units.

Here is how the Drawbar Pull equation looks like.

2854 = \frac{115 \cdot 10 \cdot 1000}{0.4} - 21

2854N = \frac{115N*mm \cdot 10 \cdot 1000}{0.4m} - 21N

2854 = \frac{115 \cdot 10 \cdot 1000}{0.4} - 21

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Drawbar Pull Solution

Follow our step by step solution on how to calculate Drawbar Pull?

FIRST Step Consider the formula

Dp = \frac{T g \cdot R g \cdot 1000}{r} - F r

Next Step Substitute values of Variables

∴

Dp = \frac{115N*mm \cdot 10 \cdot 1000}{0.4m} - 21N

Next Step Convert Units

∴

Dp = \frac{0.115N*m \cdot 10 \cdot 1000}{0.4m} - 21N

Next Step Prepare to Evaluate

∴

Dp = \frac{0.115 \cdot 10 \cdot 1000}{0.4} - 21

LAST Step Evaluate

∴

Dp = 2854N

Drawbar Pull Formula Elements

Variables

Drawbar Pull

Drawbar Pull is defined as the force acting on the driving axle excluding the rolling resistance.

Symbol: Dp

Measurement: ForceUnit: N

Note: Value should be greater than 0.

Formulas to find Drawbar Pull

Torque Generated

Torque Generated is defined as the torque derived from the engine working at the crankshaft.

Symbol: T_g

Measurement: TorqueUnit: N*mm

Note: Value should be greater than 0.

Formulas to find Torque Generated

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.

Symbol: R_g

Measurement: NAUnit: Unitless

Note: Value should be greater than 0.

Formulas to find Overall Gear Reduction

Rolling Radius of Loaded Driving Tire

Rolling Radius of Loaded Driving Tire is defined as the radius of loaded driving tire.

Symbol: r

Measurement: LengthUnit: m

Note: Value should be greater than 0.

Formulas to find Rolling Radius of Loaded Driving Tire

Rolling Resistance at Wheel

Rolling Resistance at Wheel is defined as the force that resists the motion of a wheel rolling on a surface or ground.

Symbol: F_r

Measurement: ForceUnit: N

Note: Value can be positive or negative.

Formulas to find Rolling Resistance at Wheel

Other formulas in Driveline category

Go Velocity Ratio of Hooke's Joint

V = \frac{\cos (α)}{1 - {\cos (θ)}^{2} \cdot {\sin (α)}^{2}}

Go Angular Acceleration of Driven Shaft

α B = - {ω B}^{2} \cdot \cos (α) \cdot {\sin (α)}^{2} \cdot \frac{\sin (2 \cdot Φ)}{{(1 - {\cos (Φ)}^{2} \cdot {\sin (α)}^{2})}^{2}}

Go Axial Force of Multiplate Clutch using Uniform Wear Theory

F a = π \cdot p \cdot D i \cdot (D o - D i) \cdot 0.5

Go Gear Step

φ = \frac{i n-1}{i n}

How to Evaluate Drawbar Pull?

Drawbar Pull evaluator uses Drawbar Pull = (Torque Generated*Overall Gear Reduction*1000)/Rolling Radius of Loaded Driving Tire-Rolling Resistance at Wheel to evaluate 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 evaluate Drawbar Pull using this online evaluator? To use this online evaluator for Drawbar Pull, enter Torque Generated (T_g), Overall Gear Reduction (R_g), Rolling Radius of Loaded Driving Tire (r) & Rolling Resistance at Wheel (F_r) and hit the calculate button.

FAQs on Drawbar Pull

What is the formula to find Drawbar Pull?

The formula of Drawbar Pull is expressed as Drawbar Pull = (Torque Generated*Overall Gear Reduction*1000)/Rolling Radius of Loaded Driving Tire-Rolling Resistance at Wheel. Here is an example- 2854 = (0.115*10*1000)/0.4-21.

How to calculate Drawbar Pull?

With Torque Generated (T_g), Overall Gear Reduction (R_g), Rolling Radius of Loaded Driving Tire (r) & Rolling Resistance at Wheel (F_r) we can find Drawbar Pull using the formula - Drawbar Pull = (Torque Generated*Overall Gear Reduction*1000)/Rolling Radius of Loaded Driving Tire-Rolling Resistance at Wheel.

Can the Drawbar Pull be negative?

No, the Drawbar Pull, measured in Force cannot be negative.

Which unit is used to measure Drawbar Pull?

Drawbar Pull is usually measured using the Newton[N] for Force. Exanewton[N], Meganewton[N], Kilonewton[N] are the few other units in which Drawbar Pull can be measured.

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Drawbar Pull Formula

Drawbar Pull Example

Drawbar Pull Solution

Drawbar Pull Formula Elements

Other formulas in Driveline category

How to Evaluate Drawbar Pull?

FAQs on Drawbar Pull

Variable Name