> For the complete documentation index, see [llms.txt](https://rocketry.gitbook.io/public/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://rocketry.gitbook.io/public/current-projects/alula-first-leap/propulsion.md).

# Propulsion

## Development Steps:

1. High-Level Rocket Structure: Thrust Range, Vehicle Mass (+-50%)
2. Conservative(High-Thrust) Thruster / Feed System Design + Review
3. Fluid System Assembly, Testing, Calibration. Instrumentation and Control Development. Flight Structure Design Integration
4. Static Fire Testing. Mass Optimization, Simulation Refinement.
5. Flight Vehicle Integration

## Thruster + Injector

Priorities: Stable, Conservative Performance and Efficient Manufacturing/Assembly

* Injector: Unlike-Doublet Impinging, LOX-centered
* Chamber: Ablative + Fuel Jetted Wall-Film. 6061 Aluminum Jacket.
* Nozzle: Graphite Throat, 316L Stainless Steel Expansion

<figure><img src="/files/sg2A2YSldWzisPpW50FI" alt="" width="375"><figcaption><p>Image of Thruster &#x26; Injector Parts</p></figcaption></figure>

## Fluid System (Engine "Feed System")

<div><figure><img src="/files/ulXGPnqiEH2l7kFHRXNb" alt="" width="375"><figcaption><p>Fluid System Piping and Instrumentation Diagram (P&#x26;ID)</p></figcaption></figure> <figure><img src="/files/VHsckHlFuE6OUeeLwl4W" alt="" width="375"><figcaption><p>Feed System CAD</p></figcaption></figure></div>

<figure><img src="/files/YJSKwDOXeE9KHWUYtqmO" alt=""><figcaption><p>Main Valves: Compact Pneumatic Linear &#x26; Rotary Actuators</p></figcaption></figure>