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Solid rocket propellants have the highest impulse densities typically 17 lbm-sec/in^3 or greater. Bi-propellant liquid rocket propellants such as Liquid Oxygen/Kerosene also have high density impulse, typically 12 lbm-sec/in^3 while Liquid Oxygen/Liquid Hydrogen have low density impulse below 6 lbm-sec/in^3.

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14y ago
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5mo ago

Hydrogen and helium are the fuels that have the highest specific impulse in rocket engines. They provide maximum thrust with minimum fuel consumption due to their low molecular weight and high exhaust velocity. These properties make them ideal for high-performance rocket propulsion systems.

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Q: Which fuels have the highest specific impulse?
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