Engineers at NASA’s Jet Propulsion Lab make a breakthrough in rotor technology - Ars Technica

Engineers at NASA’s Jet Propulsion Lab make a breakthrough in rotor technology  Ars TechnicaNASA Pushes Next-Gen Mars Helicopter Rotor Blades Past Mach 1  NASA (.gov)NASA confirms Mars helicopters could survive Mach 1.08 to boost lift by 30 percent  Interesting EngineeringNASA's new generation of rotor blades, with supersonic tips, is set to equip the SkyFall project: a Martian helicopter designed to carry instruments and sensors in support of future human and