Boston-based propulsion developer working on magnetically supported rim-driven electric rotors and ducted fans.
Propulsion Architecture
HyperDrive magnetic motor-bearing and rim-drive architecture; Tempest ducted-fan units have been reported in a tethered-hover demonstrator.
Primary Certification Context
Supplier / Component
Strengths
Publishes its rim-drive/magnetic-support approach and reports DARPA-supported demonstration and commercialization work. Aviation Week reported tethered hover using four Tempest fans in late September 2026.
Weaknesses / Open Questions
Tethered hover is distinct from free-flight and endurance qualification. Independently comparable installed efficiency, cooling, fault behaviour, acoustics and certified installation data remain unavailable in the reviewed material. Website performance comparisons remain company claims.
Last Updated
October 26, 2026
