Thinking ahead to when we are all flying :> , one thing that might limit where we can fly is noise complaints. The increased use of RC drones has led to laws that limit their use, and I’d hate that to happen to PPGs. I don’t know much about noise so I did some googling.
There are 3 main sources of potential noise. Props, Motors and Airframe (or for a ppg the harness, risers, frame etc.) There’s some good research being done on RC quadcopters like
Alex Stoll’s Stanford thesis on RC quadcopter noise. His conclusion showed multi-blade props were quieter, but there seems to be a trade-off between maximum thrust and minimum noise.
Some types of sound are more pleasant than others. Apparently pure, persistent notes are more annoying than varying ‘dirtier’ sounds. Would be great if we could ‘tune’ our rigs like cars or motorbikes.
Does anyone have any ideas on how best to measure and reduce noise levels?