NASA has pushed the rotor blades for its next-generation Mars helicopters past the speed of sound in recent tests, clearing a key hurdle for more powerful drones that could scout the Red Planet for future human and robotic missions.
In March, engineers at NASA's Jet Propulsion Laboratory (JPL) in Southern California spun experimental Mars helicopter blades so fast that the tips exceeded Mach 1 inside a special vacuum chamber built to mimic the thin, cold atmosphere of Mars.
Data from 137 test runs showed the blades could survive supersonic tip speeds without breaking apart, even when blasted with artificial headwinds to simulate gusty Martian winds.
NASA's Next-Generation Helicopter Blades
According to NASA, the three-bladed carbon‑fiber rotor reached about 3,750 revolutions per minute, and with added wind the blade tips hit roughly Mach 1.08 under Mars-like conditions, according to Yahoo Tech.
The new blades are designed to go far beyond the performance of NASA's Ingenuity helicopter, which made the first powered, controlled flight on another world in 2021 and completed 72 flights before its mission ended.
Ingenuity's rotors were limited to around 2,700 rpm, keeping tip speeds near Mach 0.7 to avoid the complex and potentially unstable physics around the sound barrier. Al Chen, who leads the Mars Exploration Program at JPL, said the challenge comes from Mars' atmosphere being only about 1 percent as dense as Earth's, which makes it much harder to generate lift despite the planet's lower gravity.
By pushing tip speeds into the supersonic range, NASA says it can boost lift capability by about 30 percent compared with earlier designs. That extra lift could let future helicopters carry heavier science instruments, larger batteries and more advanced sensors, and also fly farther and higher over rough terrain that wheeled rovers cannot reach, HotHardware reported.
Shannah Withrow‑Maser, an aerodynamicist on the test team, said engineers originally hoped to reach Mach 1.05 but were able to push the blades to Mach 1.08, and they are still studying the data for signs of even more available thrust.
Results from the rotor campaign are feeding directly into NASA's SkyFall project, a concept mission that would deliver three next‑generation helicopters to Mars, currently targeted for a December 2028 launch window.
SkyFall aircraft would use the new high‑speed rotors to support future human and robotic explorers by carrying scientific payloads and scouting safe routes across difficult Martian landscapes.
NASA officials say the supersonic rotor breakthrough shows that powered flight on Mars can scale up beyond technology demonstrations, turning drones into routine tools for planetary exploration in the next decade, as per News9Live.
Originally published on Science Times
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