OpenTsiolkovsky [](https://github.com/istellartech/OpenTsiolkovsky/actions)

OpenTsiolkovsky is a modern rocket flight simulator with command-line and web interfaces, implemented primarily in Rust with a legacy C++ reference implementation.

Key Features

• Rocket Simulation: Three-degree-of-freedom and six-degree-of-freedom flight simulation with attitude control (TVC)
• Multi-Platform:
  • Rust implementation: Main simulation engine with CLI and WASM support
  • Command-line interface (CLI): Fast native execution
  • Modern React/TypeScript web frontend: Interactive visualization
  • WASM support: Browser-based simulation
  • Legacy C++ implementation: Reference implementation in legacy_cpp/
• Multi-Stage Support: Supports up to three rocket stages
• Trajectory Analysis: Sub-orbital and low Earth orbit trajectories
• Data Export: CSV and JSON output formats
• Real-time Visualization: Interactive 3D trajectory viewer and performance graphs

Quick Start

Prerequisites

• Rust (stable) + Cargo
• Bun v1+ (https://bun.sh/)
• Optional: wasm-pack for WASM builds

Command Line Usage

# Build and run the Rust CLI
cargo run --bin openTsiolkovsky-cli -- --config examples/param_sample_01.json --verbose

# Or build release version
cargo build --release
./target/release/openTsiolkovsky-cli --config examples/param_sample_01.json --output my_result

Frontend Development

cd frontend
bun install
bun run dev
# Open http://localhost:5173 in your browser

WASM Build

# Install wasm-pack if not already installed
# cargo install wasm-pack

# Build WASM package for frontend
./scripts/wasm_build.sh

Project Structure

OpenTsiolkovsky/
├── src/              # Main Rust implementation
├── tests/            # Rust integration tests
├── examples/         # Configuration files and sample data
├── frontend/         # React/TypeScript web interface
├── legacy_cpp/       # Legacy C++ implementation (reference)
├── scripts/          # Build scripts (WASM, etc.)
└── docs/             # Documentation

Documentation

• Quick Start
• Development guide
• WASM build
• Configuration file
• Legacy C++ Implementation

Read more about it on the Wiki

Input file format is following input file format

License

OpenTsiolkovsky is an Open Source project licensed under the MIT License