Morning safetypee, good call on LM's Bluebird
!
Something vertical, with more than one of these engines
Correct on both counts, but I have no idea of the function of those semi-circular shaped parts, initial thoughts were brackets for a nozzle extension but if so, why would they be oddly spaced, they also seem to vary from engine to engine! They're rather small, but maybe they have some influence on the flow/noise, possibly at max thrust, pehaps someone can enlighten us?
BTW, I'm after the engine type and aircraft.