Prototyping lightweight composite LOX and IPA tanks for LV4.
The good: the current PSAS CF airframe technology seems to offer fantastic tank factors if they can be used as propellant tanks, even given extremely conservative mass growth assumptions. This could give us the mass ratios to get LV4 above the von Karman line. Early conceptual design analysis for LV4 suggests that 280x700 mm modules are optimal.
The bad: Composites are hard...
The Ugly: Proof-of-Concept Composite Fuel Tank designed and built by 2017 PSAS Capstone Team. Currently undergoing testing and refinement.
Analysis
Design
Documents
Manufacturing (Procedural documents)
Testing (Test results and procedures)