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Robert’s Rocket Project
This project documents an amateur-built liquid-fueled rocket engine and flight vehicle, including engine project pages.
About Robert’s Rocket Project
Robert's Rocket Project is a website that documents an amateur-built liquid-fueled rocket engine and flight vehicle. It includes project pages for several engines, including uncooled and 100 lbf and 250 lbf regen engines, along with pages on igniters and a test stand. A News section covers the Rocket 1 launch.
The January 25, 2022 post on the Rocket 1 launch describes the test goals, preparation, and problems. The main goal was to launch a liquid rocket and recover it successfully. The rocket reached 10,800 feet, below the roughly 15,000 feet the author's RASAero II and OpenRocket simulations predicted for a full 15-second propellant load. The author reports about 6 minutes between LOX loading and launch, during which about a third of the LOX boiled off. The page also describes an umbilical that came loose, a LOX vent valve that froze from condensed moisture during cold tests, and an unresolved need for LOX level sensing. The author states that they accept no responsibility for use of the information and that readers use it at their own risk.
Key features
- Project pages for uncooled, 100 lbf regen, and 250 lbf regen engines
- Rocket 1 launch report with photos, videos, and test data
- Launch preparation notes covering LOX loading and boiloff
- Pages on igniters and a test stand
- Notes on a pyroless recovery system and consumables loading order
Best for: Readers interested in the build details and test results of amateur liquid-fueled rocket engines and the Rocket 1 flight.
Good for
- Reports specific test figures, including altitude, engine run time, and LOX boiloff.
- Describes concrete problems and fixes, such as a valve freeze caused by condensed moisture.
- Lists practical lessons from the launch, including umbilical clearance and valve purging.
Watch out for
- The author accepts no responsibility for use of the information, and readers use it at their own risk.
- The Rocket 1 flight reached 10,800 feet, below the roughly 15,000 feet predicted by simulation.
- The author reports no reasonable solution yet for LOX level sensing.
Robert’s Rocket Project at a glance
- Website
- watzlavick.com/robert/rocket
- Type
- Website
- Pricing
- Not confirmed. Check the site
- Platforms
- Web
- Open source
- Not stated
- Last checked
- Oct 6, 2026 · Online when checked
- Listed
- Oct 5, 2026
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Robert’s Rocket Project FAQ
What was the main goal of the Rocket 1 test?
The author states that the main goal of the entire project, and of this test, was to launch a liquid rocket and recover it successfully.
What altitude did Rocket 1 reach?
The rocket reached 10,800 feet. The author's simulations had shown about 15,000 feet for a 15-second propellant load.
Does the site accept responsibility for the information it contains?
No. The site states that the author accepts no responsibility for the use of information on the site and that readers use it at their own risk.
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