Spaceflight 🚀Even though the theoretical concepts have been around for nearly 90 years, #RDEs are still in their early days. “We really don’t know what an optimized RDE even would look like yet,” #NASA’s Perkins says. “I can count the people with significant expertise in this area on 10 fingers.” Nevertheless, rising excitement is spurring #RDE startup launches. https://www.scientificamerican.com/article/ring-of-fire-rocket-engines-put-a-new-spin-on-spaceflight/
