In January, the team worked on completing the subsystems necessary and held their first TRR of the semester. While the TRR deemed the team not completely ready for hot fire, the team has a clear direction of where they need to go and they plan on quickly making the necessary changes and holding their second review in early February. On top of that, the team held elections for new subteam leads and a new chief engineer, bringing forth the next generation of Tartarus leadership. In February, the team held a TRR for our static fire test, and at this review our industry professional reviewers pointed out some problems that were deeply rooted in our system, and deemed that the system would be unsafe to fire and that major system redesign was in order. After some review within the team, we deemed that a large change in scope was in order and that the best way to proceed would be to shift our focus away from Spaceport America Cup and start with a smaller lower thrust engine. We are also going to go back and revisit our propellant choice, as many of the difficulties we encounter are caused by the danger of nitrous oxide.
To kick off spring, we held a trade study for our propellant choice and ultimately chose to switch to LOx-Ethane. While we will face challenges with cryogenic handling, we will no longer have to worry about the dangers of nitrous decomposition and keeping our propellants at +700 psi. This decision should be very beneficial to us in the future and should greatly improve the safety of our system. We also began doing some research into designing a new test stand, and we are looking into designing it to be on a trailer, which will make transportation very easy and give us the ability to be very flexible with our test site. We are also beginning to work on presentations for the Tartarus Summer Camp Lectures, which will be a series of lectures aimed at passing all the knowledge of the outgoing seniors down to the newer members of Tartarus.
Over the summer, the team did a lot of work on the design of our new Prometheus engine design, which will be targeting a thrust of 150 lbs. We also did a lot of development on the test stand trailer that we will use for the static fires of the engine. Towards the end of summer, the team began focusing on onboarding new members once school started in fall, so the team came up with new tasks for new people and the best methods for integrating new members and teaching them the basics they need to understand and operate within the team.
As the fall semester begins, the team has been hard at work onboarding new members. The team has set a PDR date of November 17, where we will present our redesigned engine, test stand, trailer, and many more to a review panel of other SHC members and industry professionals. A Work Breakdown Structure was created by management to further organize the team and give them a set deadline of tasks that need to be accomplished before PDR. The team also ran a PT integration test confirming that our PT's worked in a system with fluids in it. Furthermore, the team had three poster abstracts accepted and presented for VBS. Finally, the team decided to switch the material of the engine from stainless steel to copper. Although copper is harder to machine, it provides better thermal conductivity, which is more ideal for the team's needs.