Shaft brake power for reciprocating engine-propeller combination Calculator

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Propeller-Driven Airplane

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✖Available Power is the power of the engine. It is a characteristic of the power plant and written in the manufacturer specifications of the engine.ⓘ Available Power [P_A]			+10% -10%
✖Propeller Efficiency is defined as power produced (propeller power) divided by power applied (engine power).ⓘ Propeller Efficiency [η]			+10% -10%

✖Brake Power is the power available at the crankshaft.ⓘ Shaft brake power for reciprocating engine-propeller combination [BP]

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Formula

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Shaft brake power for reciprocating engine-propeller combination

Formula

`"BP" = "P"_{"A"}/"η"`

Example

`"22.20753W"="20.653W"/"0.93"`

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Shaft brake power for reciprocating engine-propeller combination Solution

STEP 0: Pre-Calculation Summary

Formula Used

Brake Power = Available Power/Propeller Efficiency
BP = P_A/η
This formula uses 3 Variables

Variables Used

Brake Power - (Measured in Watt) - Brake Power is the power available at the crankshaft.
Available Power - (Measured in Watt) - Available Power is the power of the engine. It is a characteristic of the power plant and written in the manufacturer specifications of the engine.
Propeller Efficiency - Propeller Efficiency is defined as power produced (propeller power) divided by power applied (engine power).

STEP 1: Convert Input(s) to Base Unit

Available Power: 20.653 Watt --> 20.653 Watt No Conversion Required
Propeller Efficiency: 0.93 --> No Conversion Required

STEP 2: Evaluate Formula

Substituting Input Values in Formula

BP = P_A/η --> 20.653/0.93

Evaluating ... ...

BP = 22.2075268817204

STEP 3: Convert Result to Output's Unit

22.2075268817204 Watt --> No Conversion Required

FINAL ANSWER

22.2075268817204 ≈ 22.20753 Watt <-- Brake Power

(Calculation completed in 00.004 seconds)

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Home » Physics » Aircraft Mechanics » Aircraft Performance » Range and Endurance » Propeller-Driven Airplane » Shaft brake power for reciprocating engine-propeller combination

Credits

Created by Vinay Mishra

Indian Institute for Aeronautical Engineering and Information Technology (IIAEIT), Pune

Vinay Mishra has created this Calculator and 300+ more calculators!

Verified by Sanjay Krishna

Amrita School of Engineering (ASE), Vallikavu

Sanjay Krishna has verified this Calculator and 200+ more calculators!

< 21 Propeller-Driven Airplane Calculators

Propeller Efficiency for given Endurance of Propeller-Driven Airplane

Go Propeller Efficiency = Endurance of Aircraft/((1/Specific Fuel Consumption)*((Lift Coefficient^1.5)/Drag Coefficient)*(sqrt(2*Freestream density*Reference Area))*(((1/Weight without fuel)^(1/2))-((1/Gross Weight)^(1/2))))

Endurance of Propeller-Driven Airplane

Go Endurance of Aircraft = Propeller Efficiency/Specific Fuel Consumption*(Lift Coefficient^1.5)/Drag Coefficient*sqrt(2*Freestream density*Reference Area)*((1/Weight without fuel)^(1/2)-(1/Gross Weight)^(1/2))

Specific Fuel Consumption for given Endurance of Propeller-Driven Airplane

Go Specific Fuel Consumption = Propeller Efficiency/Endurance of Aircraft*Lift Coefficient^1.5/Drag Coefficient*sqrt(2*Freestream density*Reference Area)*((1/Weight without fuel)^(1/2)-(1/Gross Weight)^(1/2))

Propeller Efficiency given Preliminary Endurance for Prop-Driven Aircraft

Go Propeller Efficiency = (Preliminary Endurance of Aircraft*Velocity for Maximum Endurance*Specific Fuel Consumption)/(Lift to Drag Ratio at Maximum Endurance*ln(Weight at Start of Loiter Phase/Weight at End of Loiter Phase))

Lift to Drag for Maximum Endurance given Preliminary Endurance for Prop-Driven Aircraft

Go Lift to Drag Ratio at Maximum Endurance = (Endurance of Aircraft*Velocity for Maximum Endurance*Specific Fuel Consumption)/(Propeller Efficiency*ln(Weight at Start of Loiter Phase/Weight at End of Loiter Phase))

Specific Fuel Consumption given Preliminary Endurance for Prop-Driven Aircraft

Go Specific Fuel Consumption = (Lift to Drag Ratio at Maximum Endurance*Propeller Efficiency*ln(Weight at Start of Loiter Phase/Weight at End of Loiter Phase))/(Endurance of Aircraft*Velocity for Maximum Endurance)

Specific Fuel Consumption for given Range of Propeller-Driven Airplane

Go Specific Fuel Consumption = (Propeller Efficiency/Range of aircraft)*(Lift Coefficient/Drag Coefficient)*(ln(Gross Weight/Weight without fuel))

Range of Propeller-Driven Airplane

Go Range of aircraft = (Propeller Efficiency/Specific Fuel Consumption)*(Lift Coefficient/Drag Coefficient)*(ln(Gross Weight/Weight without fuel))

Propeller Efficiency for given Range of Propeller-Driven Airplane

Go Propeller Efficiency = Range of aircraft*Specific Fuel Consumption*Drag Coefficient/(Lift Coefficient*ln(Gross Weight/Weight without fuel))

Maximum Lift to Drag Ratio given Range for Prop-driven Aircraft

Go Maximum Lift to Drag Ratio = (Range of aircraft*Specific Fuel Consumption)/(Propeller Efficiency*ln(Weight at Start of Cruise Phase/Weight at End of Cruise Phase))

Propeller Efficiency given Range for Prop-Driven Aircraft

Go Propeller Efficiency = (Range of aircraft*Specific Fuel Consumption)/(Maximum Lift to Drag Ratio*ln(Weight at Start of Cruise Phase/Weight at End of Cruise Phase))

Specific Fuel Consumption given Range for Prop-Driven Aircraft

Go Specific Fuel Consumption = (Propeller Efficiency*Maximum Lift to Drag Ratio*ln(Weight at Start of Cruise Phase/Weight at End of Cruise Phase))/Range of aircraft

Specific Fuel Consumption for given Range and lift-to-drag ratio of Propeller-Driven Airplane

Go Specific Fuel Consumption = (Propeller Efficiency/Range of aircraft)*(Lift-to-drag ratio)*(ln(Gross Weight/Weight without fuel))

Range of Propeller-Driven Airplane for given lift-to-drag ratio

Go Range of aircraft = (Propeller Efficiency/Specific Fuel Consumption)*(Lift-to-drag ratio)*(ln(Gross Weight/Weight without fuel))

Propeller Efficiency for given Range and lift-to-drag ratio of Propeller-Driven Airplane

Go Propeller Efficiency = Range of aircraft*Specific Fuel Consumption/(Lift-to-drag ratio*(ln(Gross Weight/Weight without fuel)))

Cruise Weight Fraction for Prop-Driven Aircraft

Go Cruise Weight Fraction = exp((Range of aircraft*(-1)*Specific Fuel Consumption)/(Maximum Lift to Drag Ratio*Propeller Efficiency))

Propeller efficiency for reciprocating engine-propeller combination

Go Propeller Efficiency = Available Power/Brake Power

Shaft brake power for reciprocating engine-propeller combination

Go Brake Power = Available Power/Propeller Efficiency

Power available for reciprocating engine-propeller combination

Go Available Power = Propeller Efficiency*Brake Power

Lift to Drag Ratio for Maximum Endurance given Max Lift to Drag Ratio for Prop-driven Aircraft

Go Lift to Drag Ratio at Maximum Endurance = 0.866*Maximum Lift to Drag Ratio

Maximum Lift to Drag Ratio given Lift to Drag Ratio for Max Endurance of Prop-Driven Aircraft

Go Maximum Lift to Drag Ratio = Lift to Drag Ratio at Maximum Endurance/0.866

Shaft brake power for reciprocating engine-propeller combination Formula

Brake Power = Available Power/Propeller Efficiency
BP = P_A/η

How is shaft power calculated?

Shaft power is usually calculated as a sum of the torque and the speed of the rotation of the shaft.

How to Calculate Shaft brake power for reciprocating engine-propeller combination?

Shaft brake power for reciprocating engine-propeller combination calculator uses Brake Power = Available Power/Propeller Efficiency to calculate the Brake Power, The Shaft brake power for reciprocating engine-propeller combination is equal to the ratio of available power and efficiency of the propeller. Brake Power is denoted by BP symbol.

How to calculate Shaft brake power for reciprocating engine-propeller combination using this online calculator? To use this online calculator for Shaft brake power for reciprocating engine-propeller combination, enter Available Power (P_A) & Propeller Efficiency (η) and hit the calculate button. Here is how the Shaft brake power for reciprocating engine-propeller combination calculation can be explained with given input values -> 1075.269 = 20.653/0.93.

FAQ

What is Shaft brake power for reciprocating engine-propeller combination?

The Shaft brake power for reciprocating engine-propeller combination is equal to the ratio of available power and efficiency of the propeller and is represented as BP = P_A/η or Brake Power = Available Power/Propeller Efficiency. Available Power is the power of the engine. It is a characteristic of the power plant and written in the manufacturer specifications of the engine & Propeller Efficiency is defined as power produced (propeller power) divided by power applied (engine power).

How to calculate Shaft brake power for reciprocating engine-propeller combination?

The Shaft brake power for reciprocating engine-propeller combination is equal to the ratio of available power and efficiency of the propeller is calculated using Brake Power = Available Power/Propeller Efficiency. To calculate Shaft brake power for reciprocating engine-propeller combination, you need Available Power (P_A) & Propeller Efficiency (η). With our tool, you need to enter the respective value for Available Power & Propeller Efficiency 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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