Overview
- This week NASA awarded a NIAC Phase 1 grant to the SPARK team to begin a nine‑month feasibility study of tiny spherical aerobots for exploring Titan’s karst caves and sinkholes.
- SPARK proposes electrohydrodynamic (EHD) or atmospheric ion thrusters, a solid‑state, silent method that uses high voltage to ionize and accelerate surrounding gas to produce thrust.
- NASA projects EHD thrusters could be over 100× more power‑efficient on Titan than on Earth because Titan’s cold, dense nitrogen‑methane air makes it easier to create and push charged particles.
- The team, led by Daniel Drew with collaborators at JPL and the Blue Marble Space Institute, will run lab experiments, thermal and power modeling, and subsystem trade studies and will publish a comprehensive public report.
- SPARK remains early‑stage and would need a successful Phase 2 prototype effort of up to two years before a flight‑ready system is realistic, so it is unlikely to meet Dragonfly’s planned 2028 launch window though it could influence later Titan missions.