It looks familiar, although I might be on the wrong track. I'm thinking a twin, or multi turbo-prop job, probably a military version, in a museum, so more likely American. Something like the turbo version of the Convair Coronado, can't remember the military designation !
What was tha twin seat tandem high aspect ratio doobrie used by the US during the Vietnam'era'...Quiet Star ?....based on a motorised glider and had an exhaust pipe shrouded that ran the full length of the fuselage
Yup, probably wrong but I'll go with a Lockheed YO3 Quiet Star