NASA NTRS · 20200005115
TPSAS-NF1676L-31544-DND
Abstract
Small unmanned aircraft system (sUAS) rotors differ greatly from those of conventional helicopter, they are 20-50 times smaller, have higher rotation speeds, their multiple rotor configurations means rotors may interact with each other aerodynamically, and they have fixed pitch (no collective/trim controls). Broadband noise may have comparable amplitudes to BPF harmonic amplitudes.
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Nicole A Pettingill, Nikolas S Zawodny. TPSAS-NF1676L-31544-DND. https://ntrs.nasa.gov/citations/20200005115
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