On 2010-08-02 21:12, John Sessoms wrote:
The UH-60 has a very quiet rotor system by comparison, with no distinctive beat.
Not really a beat, the way the UH-1 has that unmistakable "THWOP" that hits you in the chest, and even the AH-1 Cobra has it, to an extent. But the UH-60 has a distinctive "note", nonetheless, at least to me. For me, it's like four-piston-engined bombers ... they just sound like what they are ... the UH-60 also "sounds like a UH-60". As opposed to the "Warthog" and "Spectre", which seem mostly inaudible in normal operations and profiles until their ordnance starts lighting up around you.
Speaking of four-piston-engined bombers, my brother and I both had eerily similar experiences with friends a few years back, about a year apart. In both cases, one of us was standing around outside with some friends. A throaty drone starts to become noticeable. I (or my brother) remarks that we hear "one, no two, four-engined bombers". Our friends respond with lots and lots of disbelief. Then, a couple of minutes later, lo-and-behold, a B-17 and a B-24 fly over at maybe 500 to 1000 feet. :-) Really freaked out our friends. Really freaked us out when we compared notes and noticed how similar our events were, too.
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