The Gyrodyne QH-50 DASH was produced in the 1960s as an anti-submarine platform for ships that were too small to accommodate manned helicopters.  I had never heard of it before and saw it on the ramp at Olympia during the Olympic Air Show this year.  Apparently, there are some at museums I have been to before, but I guess I wasn’t paying attention.  It is a small vehicle with a gas turbine and coaxial rotors.  I understand it could carry a couple of torpedoes so now slouch.  Now it is a museum piece, but it might have been interesting to see one in the air!