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Used to see the Optica regularly, it looked right somehow, odd, but right. The Hampshire Police crashed the one they trying out just up the road from me. The plane got the blame, but, if I remember rightly the CAA decided it was being flown outside it's envelope.
I think everybody was. It was so quiet, as a surviellence plane it would have been superb.The Optica came out when I was at school and I was fascinated by it.
XP-80? (Halford -Goblin- powered, smaller, first Shooting star prototype) AKA the "Green Hornet"
I concur with kk89 on the XP-80
XP80
Could it be the Martin XB-51? You haven't left us much to go on.
Its the full scale mock up of the MyasischevM-28-2.
The last little one is a Seabird SB7L-360 Seeker.