Nasa-ingenjörer når genombrott med överljudsrotorer för Mars-helikoptrar

Svenska

Ingenjörer vid Nasas Jet Propulsion Laboratory har framgångsrikt testat större rotorblad som roterar snabbare än ljudets hastighet utan att gå sönder. Milstolpen, som tillkännagavs på torsdagen, ökar lyftkapaciteten med 30 procent för framtida Mars-uppdrag.

Testerna genomfördes i en kammare som simulerade Mars tunna atmosfär, där rotorbladsspetsarna nådde Mach 1,08. Ingenjörer vid JPL och AeroVironment använde både trebladiga och tvåbladiga konstruktioner, där den sistnämnda matchar den konfiguration som planeras för SkyFall-uppdraget. En fläkt inuti kammaren simulerade motvind allt eftersom hastigheterna ökade, och teamet observerade resultaten från ett närliggande kontrollrum.

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