Payload fraction

Payload / propellant / structure mass fractions from gross stack.

SIDUS educational calculator. Category propulsion. Tags: mission-design, propulsion. Pure SI. Not flight software.

Formula

f_pl = m_pl/m₀

Payload mass fraction

Primary sources

• Rocket Propulsion Elements (Sutton & Biblarz): Standard propulsion text for rocket equation, Isp, and staged vehicles.
• Orbital Mechanics for Engineering Students (Howard D. Curtis): Textbook derivations for Hohmann, vis-viva, rocket equation, elements.

How do AI agents use this tool?

Read /llms.txt or call https://sidus.tools/api/mcp. Open the interactive page for live SI inputs.