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NASA engineers at the Jet Propulsion Laboratory in Southern California have tested next-generation Mars helicopter rotor blades in a simulated Martian atmosphere and driven rotor-tip speeds beyond Mach 1.
During a 137-run campaign concluded in March, teams mounted a three-bladed rotor in JPLâs 25-Foot Space Simulator, evacuated the chamber and backfilled it with carbon dioxide to Martian pressures, then increased rpm and headwinds until tip speeds reached Mach 1.08 at about 3,750 rpm.
That regime boosted lift by roughly 30%, a gain that could allow future aircraft to carry heavier science instruments, larger batteries and longer-duration flight systems.
A two-bladed SkyFall rotor design reached comparable tip speeds at about 3,570 rpm.
The rotors, built by AeroVironment, were tested to assess structural integrity near the sonic edge and to inform designs for the agencyâs next-generation Mars aerial vehicles.








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