New kind of helicopter?

"John Ross" wrote in message
. 3.6

Several times over the last few months, I have heard what sounded
like a small bizz jet overhead, and gone outside only to find that it
is some kind of a helicopter. I can hear almost no rotor sounds,
just the light roar of a jet engine. The only distinguishing feature
(to my eye) is that it has two parallel vertical tail structures,
kind of like on an A-10 Warthog, but very much smaller.

It looks like a normal commercial 'copter, other than that. Does
anyone know what kind it might be?

Thanks,
John Ross

ps. No, it's not one of them U.N. Black Helicopters.

I'm thinking you're seeing a gyrocopter like this one:


--
John T
http://tknowlogy.com/tknoFlyer
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