ENGINE DEVELOPMENT
The Engine Dev team designs, manufactures, and tests all of YJSP’s kerosene-liquid oxygen engines, injectors, igniters and all other engine related hardware. The team also designs, builds, and operates the test stands required to hotfire 5000 lbf engines, allowing for complete characterization of engine performance prior to integrating them on our rockets. The Engine Dev team is developing three different injectors (Pintle, Coaxial Swirl, and Impinging) and three different engines (Heatsink, Ablative, and Regeneratively Cooled). The team also works on several other innovative and experimental projects, such as bangbang pressurization control and high-power electric pump for delivering propellants to the engine at high flow rates and pressures.
YJ-1S
YJ-1S is a subscale test article and the first liquid-fueled engine developed by the YJSP team. The goal of the project is to develop a small scale, robust, and test-focused engine to enable us to rapidly test and iterate on component design. YJ-1S is made of a large mass of steel which acts as a heatsink to keep the engine chamber from melting over short duration burns. It also has an ablative graphite throat insert to prevent the steel from melting at the hottest part of the engine.
- Thrust: 3500 N
- Chamber Pressure: 18 Bar
- Isp (SL) : 244 s
- C*: 1708 m/s
- Fuel: Jet-A
- Oxidizer: LOX
- Fluid Flow Rate: 0.53 kg/s
- Oxidizer Flow Rate: 0.95 kg/s
- Oxidizer-to-Fuel Ratio: 1.8:1
Injectors
GROUND FEED SYSTEM
The Ground Feed System (GFS) is YJSP’s first engine test stand. GFS is comprised of two structures, the tank stand and the thrust structure. The tank stand holds our liquid oxygen and Jet-A tanks and has a pressure control panel on the side for operators to access. The thrust structure takes up the load from the engine and measures the thrust using a load cell. GFS completed its first hotfire in 2019 of the YJ-1S engine, and after 6 more hotfires the engine was sent over to the GoldiLOX team for vehicle static fires.
