Specific thrust Calculator

✖Exit Velocity refers to the speed at which gases expand at the exit of nozzle of a engine.ⓘ Exit Velocity [V_e]			+10% -10%
✖Flight Speed refers to the velocity at which an aircraft moves through the air.ⓘ Flight Speed [V]			+10% -10%

✖Specific Thrust is the thrust produced per unit mass in per unit time.ⓘ Specific thrust [I_sp]

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Formula

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Specific thrust

Formula

I sp = V e - V

Example

137 m/s = 248 m/s - 111 m/s

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Specific thrust Solution

STEP 0: Pre-Calculation Summary

Formula Used

Specific Thrust = Exit Velocity-Flight Speed
I_sp = V_e-V
This formula uses 3 Variables

Variables Used

Specific Thrust - (Measured in Meter per Second) - Specific Thrust is the thrust produced per unit mass in per unit time.
Exit Velocity - (Measured in Meter per Second) - Exit Velocity refers to the speed at which gases expand at the exit of nozzle of a engine.
Flight Speed - (Measured in Meter per Second) - Flight Speed refers to the velocity at which an aircraft moves through the air.

STEP 1: Convert Input(s) to Base Unit

Exit Velocity: 248 Meter per Second --> 248 Meter per Second No Conversion Required
Flight Speed: 111 Meter per Second --> 111 Meter per Second No Conversion Required

STEP 2: Evaluate Formula

Substituting Input Values in Formula

I_sp = V_e-V --> 248-111

Evaluating ... ...

I_sp = 137

STEP 3: Convert Result to Output's Unit

137 Meter per Second --> No Conversion Required

FINAL ANSWER

137 Meter per Second <-- Specific Thrust

(Calculation completed in 00.004 seconds)

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Credits

Created by Chilvera Bhanu Teja

Institute of Aeronautical Engineering (IARE), Hyderabad

Chilvera Bhanu Teja has created this Calculator and 300+ more calculators!

Verified by Vaibhav Malani

National Institute of Technology (NIT), Tiruchirapalli

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< Thrust Generation Calculators

Total Thrust given Efficiency and Enthalpy

Go Total Thrust = Mass Flow Rate*((sqrt(2*Enthalpy Drop in Nozzle*Nozzle Efficiency))-Flight Speed+(sqrt(Turbine Efficiency*Efficiency of Transmission*Enthalpy Drop in Turbine)))

Thrust power

Go Thrust Power = Mass Flow Rate*Flight Speed*(Exit Velocity-Flight Speed)

Ideal Thrust given Effective Speed Ratio

Go Ideal Thrust = Mass Flow Rate*Flight Speed*((1/Effective Speed Ratio)-1)

Specific thrust

Go Specific Thrust = Exit Velocity-Flight Speed

Specific thrust Formula

Specific Thrust = Exit Velocity-Flight Speed
I_sp = V_e-V

What is specific thrust?

Specific thrust is defined as the thrust per unit mass of air flow, it is also known as specific impulse.

How to Calculate Specific thrust?

Specific thrust calculator uses Specific Thrust = Exit Velocity-Flight Speed to calculate the Specific Thrust, Specific Thrust is a measure of the efficiency of a propulsion system, calculated as the difference between the exit velocity of the exhaust gases and the flight speed, providing a critical performance indicator for aerospace engineers and aircraft designers. Specific Thrust is denoted by I_sp symbol.

How to calculate Specific thrust using this online calculator? To use this online calculator for Specific thrust, enter Exit Velocity (V_e) & Flight Speed (V) and hit the calculate button. Here is how the Specific thrust calculation can be explained with given input values -> 137 = 248-111.

FAQ

What is Specific thrust?

Specific Thrust is a measure of the efficiency of a propulsion system, calculated as the difference between the exit velocity of the exhaust gases and the flight speed, providing a critical performance indicator for aerospace engineers and aircraft designers and is represented as I_sp = V_e-V or Specific Thrust = Exit Velocity-Flight Speed. Exit Velocity refers to the speed at which gases expand at the exit of nozzle of a engine & Flight Speed refers to the velocity at which an aircraft moves through the air.

How to calculate Specific thrust?

Specific Thrust is a measure of the efficiency of a propulsion system, calculated as the difference between the exit velocity of the exhaust gases and the flight speed, providing a critical performance indicator for aerospace engineers and aircraft designers is calculated using Specific Thrust = Exit Velocity-Flight Speed. To calculate Specific thrust, you need Exit Velocity (V_e) & Flight Speed (V). With our tool, you need to enter the respective value for Exit Velocity & Flight Speed and hit the calculate button. You can also select the units (if any) for Input(s) and the Output as well.

How many ways are there to calculate Specific Thrust?

In this formula, Specific Thrust uses Exit Velocity & Flight Speed. We can use 1 other way(s) to calculate the same, which is/are as follows -

Specific Thrust = Exit Velocity*(1-Effective Speed Ratio)

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