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Exhaust Lap Formula

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Exhaust Lap is the displacement of the valve from its mid-position at release and compression. Check FAQs

e = - r \cdot (\sin (θ + α))

e - Exhaust Lap?r - Eccentricity or Throw of Eccentric?θ - Crank Angle?α - Angle of Advance of the Eccentric?

Exhaust Lap Example

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With units

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Here is how the Exhaust Lap equation looks like with Values.

Here is how the Exhaust Lap equation looks like with Units.

Here is how the Exhaust Lap equation looks like.

-2.0002 = - 2.7 \cdot (\sin (15.5 + 32.3))

-2.0002mm = - 2.7mm \cdot (\sin (15.5° + 32.3°))

-2.0002 = - 2.7 \cdot (\sin (15.5 + 32.3))

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Exhaust Lap Solution

Follow our step by step solution on how to calculate Exhaust Lap?

FIRST Step Consider the formula

e = - r \cdot (\sin (θ + α))

Next Step Substitute values of Variables

∴

e = - 2.7mm \cdot (\sin (15.5° + 32.3°))

Next Step Convert Units

∴

e = - 0.0027m \cdot (\sin (0.2705rad + 0.5637rad))

Next Step Prepare to Evaluate

∴

e = - 0.0027 \cdot (\sin (0.2705 + 0.5637))

Next Step Evaluate

∴

e = -0.00200017240997394m

Next Step Convert to Output's Unit

∴

e = -2.00017240997394mm

LAST Step Rounding Answer

∴

e = -2.0002mm

Exhaust Lap Formula Elements

Variables

Functions

Exhaust Lap

Exhaust Lap is the displacement of the valve from its mid-position at release and compression.

Symbol: e

Measurement: LengthUnit: mm

Note: Value can be positive or negative.

Formulas to find Exhaust Lap

Eccentricity or Throw of Eccentric

Eccentricity or Throw of Eccentric is the extent to which the mantle veers from its axis, so it defines the rate at which the material falls through the chamber.

Symbol: r

Measurement: LengthUnit: mm

Note: Value can be positive or negative.

Formulas to find Eccentricity or Throw of Eccentric

Crank Angle

Crank Angle refers to the position of an engine's crankshaft in relation to the piston as it travels inside of the cylinder wall.

Symbol: θ

Measurement: AngleUnit: °

Note: Value can be positive or negative.

Formulas to find Crank Angle

Angle of Advance of the Eccentric

Angle of advance of the eccentric the angle in excess of 90° that a steam-engine valve gear is in advance of the crank.

Symbol: α

Measurement: AngleUnit: °

Note: Value can be positive or negative.

Formulas to find Angle of Advance of the Eccentric

sin

Sine is a trigonometric function that describes the ratio of the length of the opposite side of a right triangle to the length of the hypotenuse.

Syntax: sin(Angle)

Other formulas in Steam Engine Valves and Reversing Gears category

Go Crank Angle

θ = a \sin (- \frac{e}{r}) - α

Go Angle of Advance of Eccentric

α = a \sin (\frac{s + l}{OE})

Go Eccentricity or Throw of Eccentric

r = \frac{t}{2}

Go Steam Lap at Admission and Cutoff

s = r \cdot (\sin (θ + α))

How to Evaluate Exhaust Lap?

Exhaust Lap evaluator uses Exhaust Lap = -Eccentricity or Throw of Eccentric*(sin(Crank Angle+Angle of Advance of the Eccentric)) to evaluate the Exhaust Lap, Exhaust Lap formula is defined as the measure of the distance traveled by the valve during the exhaust stroke in a steam engine, which is critical in determining the efficiency of the engine's operation, particularly in reversing gears. Exhaust Lap is denoted by e symbol.

How to evaluate Exhaust Lap using this online evaluator? To use this online evaluator for Exhaust Lap, enter Eccentricity or Throw of Eccentric (r), Crank Angle (θ) & Angle of Advance of the Eccentric (α) and hit the calculate button.

FAQs on Exhaust Lap

What is the formula to find Exhaust Lap?

The formula of Exhaust Lap is expressed as Exhaust Lap = -Eccentricity or Throw of Eccentric*(sin(Crank Angle+Angle of Advance of the Eccentric)). Here is an example- 1997.004 = -0.0027*(sin(0.27052603405907+0.563741348394062)).

How to calculate Exhaust Lap?

With Eccentricity or Throw of Eccentric (r), Crank Angle (θ) & Angle of Advance of the Eccentric (α) we can find Exhaust Lap using the formula - Exhaust Lap = -Eccentricity or Throw of Eccentric*(sin(Crank Angle+Angle of Advance of the Eccentric)). This formula also uses Sine function(s).

Can the Exhaust Lap be negative?

Yes, the Exhaust Lap, measured in Length can be negative.

Which unit is used to measure Exhaust Lap?

Exhaust Lap is usually measured using the Millimeter[mm] for Length. Meter[mm], Kilometer[mm], Decimeter[mm] are the few other units in which Exhaust Lap can be measured.

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Exhaust Lap Formula

Exhaust Lap Example

Exhaust Lap Solution

Exhaust Lap Formula Elements

Other formulas in Steam Engine Valves and Reversing Gears category

How to Evaluate Exhaust Lap?

FAQs on Exhaust Lap

Variable Name