How do I simulate a space capsule?

Open this page and use the live Rocket Staging tool below — set your inputs and the simulation runs instantly in your browser using real numerics. No install, no account needed.

Yes. The simulation runs free in your browser. A one-time unlock or a Pro plan adds advanced parameters, saved presets, data import, and clean exports.

Can I use my own numbers?

Absolutely — every input is adjustable, and with data import you can drive a space capsule from your own measurements.

Use case · powered by Rocket Staging

Rocket Staging for a space capsule

Simulate a space capsule live in your browser. This runs the real Rocket Staging solver — adjust the inputs, watch it respond instantly, and export the result. No install, no account.

For:Students Researchers Educators Engineers Hobbyists & Makers K-12 Students First Responders

Rocket StagingLive

beating the tyranny of the equation

Controls

Presets

Number of stages

Mass ratio per stage

Specific impulse Isp (s)

The rocket equation grows delta-v only with the logarithm of the mass ratio, so a single stage hauling empty tanks all the way up is hopelessly inefficient. Staging drops dead weight along the way: each stage contributes ve·ln(mass ratio), and their sum easily clears the ~9.4 km/s needed for low Earth orbit.

▶ Run in Python

Data Inspector

Δv per stage4.76 km/s

Total Δv9.52 km/s

Reaches LEO?yes

Governing equation

Δ v = i = 1 \sum 2 v_{e, i} ln \frac{m _{0, i}}{m _{f, i}} = 2 \cdot 4.76 = 9.52 km/s

Reading this result: 2 stages at Isp 350s and mass ratio 4 each sum to 9.5 km/s — past the ~9.4 km/s LEO budget, since every stage adds ve·ln(ratio) after dropping dead weight.

Runs locally in your browser — free forever. Scale to the cloud when reality gets heavy.

or unlock everything with Pro →

About this simulation

The full Rocket Staging tool models a space capsule with the same numerics engineers and scientists use — running entirely client-side. Change any parameter and the result updates in real time, so you can build intuition, check a design, or teach the concept without spreadsheets or installs.

More you can do with Rocket Staging

Rocket Staging for a passenger jet wing Rocket Staging for a rocket ascent Rocket Staging for a drone quadcopter Rocket Staging for a glider Rocket Staging for a paper airplane Rocket Staging for a Mars lander Rocket Staging for a satellite reentry Rocket Staging for a model rocket

Other ways to simulate a space capsule

Rocket Equation for a space capsule Orbital Transfer for a space capsule Airfoil Lift & Drag for a space capsule Glide Performance for a space capsule Atmospheric Reentry for a space capsule Standard Atmosphere for a space capsule

Frequently asked questions

How do I simulate a space capsule?: Open this page and use the live Rocket Staging tool below — set your inputs and the simulation runs instantly in your browser using real numerics. No install, no account needed.
Is it free?: Yes. The simulation runs free in your browser. A one-time unlock or a Pro plan adds advanced parameters, saved presets, data import, and clean exports.
Can I use my own numbers?: Absolutely — every input is adjustable, and with data import you can drive a space capsule from your own measurements.