Propulsion Calculator

The throat area ratio formula, often used in fluid mechanics, typically refers to the ratio of the cross-sectional area of a throat to the cross-sectional area of a duct or nozzle. It’s commonly denoted as AR and calculated as: Where: At​ is the cross-sectional area of the throat. Ae​ is the cross-sectional area of the […]

The pressure ratio, often denoted as PR, is the ratio of the outlet pressure to the inlet pressure in a fluid system, such as a compressor or a pump. This ratio is crucial in determining the performance and efficiency of such systems. Where: Pout​ is the outlet pressure. Pin​ is the inlet pressure.

Thermal choking is a phenomenon that occurs when a system’s performance is limited by its ability to dissipate heat. The formula for thermal choking can vary depending on the specific system and its components, but in general, it involves factors such as thermal resistance, heat generation rate, ambient temperature, and heat dissipation capacity. One common

The formula for calculating flow choking in a converging-diverging nozzle, often referred to as the critical flow condition, is typically given by where: γ is the specific heat ratio (ratio of specific heats), R is the gas constant, and T is the temperature.

The speed of sound Calculator refers to the rate at which sound waves propagate through a medium. It represents the velocity at which disturbances or vibrations in the medium, caused by a source such as a vibrating object or a pressure variation, travel from one point to another. Where: v is the speed of sound.

The specific energy formula typically refers to the energy stored per unit mass of a substance. For example, in the context of batteries, the specific energy formula is: Where: E is the energy stored (in joules, for example). m is the mass of the substance (in kilograms, for example)

The efficiency of a rocket motor can be calculated using the specific impulse and the gravitational constant with the formula: Where: Isp​ is the specific impulse (measured in seconds), g is the standard acceleration due to gravity (approximately 9.81 m/s² on Earth), ve​ is the exhaust velocity of the rocket motor.

Effective exhaust velocity (Ve) is a measure used in rocket propulsion to describe the efficiency of a rocket engine. It represents the velocity at which the rocket’s exhaust gases leave the engine relative to the rocket itself, taking into account the effects of pressure and temperature within the engine. It is a crucial parameter in

Impulse density refers to the amount of impulse (change in momentum) per unit volume. It is often used in fluid dynamics or electromagnetic theory to describe the momentum transfer per unit volume within a system or medium. Where: ρ represents the density of the substance (mass per unit volume), v represents the velocity vector of

Thrust-specific fuel consumption. engines define specific fuel consumption (SFC) as fuel consumed per unit of produced thrust or power. The formula for specific fuel consumption depends on whether you’re measuring it in terms of thrust or power. For  (TSFC), the formula is: Where: TSFC is the thrust-specific fuel consumption (typically measured in units like kg/N·s