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

1. Engineers at NASA’s Jet Propulsion Lab make a breakthrough in rotor technology  Ars Technica
2. NASA Pushes Next-Gen Mars Helicopter Rotor Blades Past Mach 1  NASA (.gov)
3. NASA'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 robotic missions on Mars.  CPG Click Petróleo e Gás
4. NASA confirms Mars helicopters could survive Mach 1.08 to boost lift by 30 percent  Yahoo Tech
5. SkyFall helicopter for Mars breaks the sound barrier  Universe Space Tech

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