I am trying to identify yet another Hughes 500 M-D TOW Defender demonstrator, this time the one that featured at the 1977 Paris Air Show. It was on static display for the majority of it's time there but may have flown occasionally during that show. I don't believe it is the same airframe as the one that appeared at Farnborough the following year and mentioned earlier in this thread. Again, if anyone can identify this helicopter, I would be very grateful. A google search has thrown up nothing.
500 Fan.