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Wind Resistance Formula

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Wind Resistance is the resistance caused due to prevailing wind and it can be divided into two components.One helps in forward motion of the train and the other opposes the motion of the train. Check FAQs

R w = 0.000017 \cdot a \cdot V^{2}

R_w - Wind Resistance?a - Exposed Area?V - Velocity of Wind?

Wind Resistance Example

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Here is how the Wind Resistance equation looks like with Values.

Here is how the Wind Resistance equation looks like with Units.

Here is how the Wind Resistance equation looks like.

10.88 = 0.000017 \cdot 400 \cdot 40^{2}

10.88 = 0.000017 \cdot 400m² \cdot {40km/h}^{2}

10.88 = 0.000017 \cdot 400 \cdot 40^{2}

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Wind Resistance Solution

Follow our step by step solution on how to calculate Wind Resistance?

FIRST Step Consider the formula

R w = 0.000017 \cdot a \cdot V^{2}

Next Step Substitute values of Variables

∴

R w = 0.000017 \cdot 400m² \cdot {40km/h}^{2}

Next Step Prepare to Evaluate

∴

R w = 0.000017 \cdot 400 \cdot 40^{2}

LAST Step Evaluate

∴

R w = 10.88

Wind Resistance Formula Elements

Variables

Wind Resistance

Wind Resistance is the resistance caused due to prevailing wind and it can be divided into two components.One helps in forward motion of the train and the other opposes the motion of the train.

Symbol: R_w

Measurement: NAUnit: Unitless

Note: Value can be positive or negative.

Formulas to find Wind Resistance

Exposed Area

Exposed Area is the area of the train facing the prevailing wind.It is given in square meters.

Symbol: a

Measurement: AreaUnit: m²

Note: Value should be greater than 0.

Formulas to find Exposed Area

Velocity of Wind

Velocity of Wind is an air moving from high to low pressure, usually due to changes in temperature that the horizontal movement of air specified by its speed and direction.

Symbol: V

Measurement: SpeedUnit: km/h

Note: Value should be greater than 0.

Formulas to find Velocity of Wind

Other formulas in Traction and Tractive Resistances category

Go Total Train Resistance

RT1 = 0.0016 \cdot w t + 0.00008 \cdot w t \cdot V t + 0.0000006 \cdot w t \cdot {V t}^{2}

Go Resistance Due to Gradients

Rg = w t \cdot (\frac{m}{100})

Go Hauling Capacity of Locomotive

Hc = μ \cdot w \cdot n

Go Coefficient of Friction for given Hauling Capacity of Locomotive

μ = \frac{Hc}{w \cdot n}

How to Evaluate Wind Resistance?

Wind Resistance evaluator uses Wind Resistance = 0.000017*Exposed Area*Velocity of Wind^2 to evaluate the Wind Resistance, The Wind Resistance is caused by the prevailing wind.It also depends upon the angle at which the wind impinges the train.Maximum side wind resistance generally occurs when wind is acting at an angle of 60° to the direction of train movement. Wind Resistance is denoted by R_w symbol.

How to evaluate Wind Resistance using this online evaluator? To use this online evaluator for Wind Resistance, enter Exposed Area (a) & Velocity of Wind (V) and hit the calculate button.

FAQs on Wind Resistance

What is the formula to find Wind Resistance?

The formula of Wind Resistance is expressed as Wind Resistance = 0.000017*Exposed Area*Velocity of Wind^2. Here is an example- 10.88 = 0.000017*400*11.1111111111111^2.

How to calculate Wind Resistance?

With Exposed Area (a) & Velocity of Wind (V) we can find Wind Resistance using the formula - Wind Resistance = 0.000017*Exposed Area*Velocity of Wind^2.

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