It was a VERY interesting (but brief) search... The thought process went:
Obviously rotary-wing
Forward, mid, aft, temperature gauges with fairly low values on them
Hard to say, but it looks like oil pressure gauges ditto
...so, something with a long transmission perhaps
Could it be a tandem rotor?
Wiki'd tandem rotor helicopters because the lists there tend to be quite complete, by chance picked the Piasecki 21 as the first to look at properly, as I didn't know much about it, and found the cockpit shot. Job done, I hope!
Hmmm, have we had it before?
Piasecki CH-21 Shawnee 57 1123 15/04/2007
Last edited by TheiC; 22nd Mar 2013 at 18:49.