# Timeline ### Sep. 2018 - Sep. 2021, Viability discussion and project proposal The project originated from "Hot Take," a project proposal that outlined a plan for STAR to explore liquid rocketry. ### Sep. 2021 - Feb. 2022, Designing phase During this phase, the team mainly focused on designing the physical system, as well as manufacturing various parts of the liquid engine, such as the injector and combustion chamber. ### Feb. 2022 - Apr. 2022, Integration Most of the software and electrical development occurred during this phase. ### Apr. 16, 2022, Hot-fire Attempt 1 The first attempt did not succeed, but it provided valuable information regarding the flaw in our system. ### May 22, 2022, Hot-fire Attempt 2 Successful hot-fire with a burn time of 6 seconds. --- # Agent Instructions: Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. Perform an HTTP GET request on the current page URL with the `ask` query parameter: ``` GET https://rocketry.gitbook.io/public/previous-projects/ellie/timeline.md?ask= ``` The question should be specific, self-contained, and written in natural language. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.