Helicopters over Puna

[rainshadow]

Believe it or not, the big Blue Hawaiian choppers do have sound dampening; I think the FAA called it silent running or similar, which is of course hilarious. I've noticed when those choppers go overhead (when they're using that technique), they are somewhat quieter directly above. However, those same choppers with that same technology applied actually sound louder as they approach/depart the airspace above my head. Probably some weird physics off the side of the aircraft (versus straight down below it) that I don't know much about. Sound traveling, bending, etc... much like the doppler affect, I bet.

Anyhooz. That's about the most interesting thing about those damn things, IMHO.


-- rainshadow