Tough question. The terms are often used interchangeably, but I would say that a nacelle refers more to the protective housing that encases the engine, while a cowling is used at the front of the engine both for protection (as a nacelle) and also to streamline and direct airflow.
The cowling.
Cowling.
The cowling on the aircraft was damaged during the landing, requiring immediate repairs to ensure safety.
aircraft powerplant consist of engine, plus inlet and exhaust nozzle.
primary structures are components or assemblies that are necessary to sustain design ultimate and ground loads.
lvl
A glider is an aircraft that doesn't have an engine.
Oil began to spit from the right inboard engine of the B-17, streaking backwards along it's cowling.
aircraft engines are normally reciprocating engine or pistan engine, the Aircraft instruments in a reciprocating engine arecylinderpistonand so...................
Aircraft engine manufacturers construct aircraft engines, and maintain the engines when faulty.
The aircraft maker constructs the cowlings.
A 'reciprocating engine' is just another name for a piston engine as opposed to a jet. Technically, the engine works just like the one in your car, with a piston moving in and out of a cylinder. The difference may be that the aircraft engine may have it's cylinders arranged in a circle ( radial engine) but the action is just the same.