1) Aircraft engine covering 2) Airplane engine cover 3) Auto part 4) Bonnet 5) Cowl 6) Engine covering 7) Hood 8) Protection 9) Protective cover 10) Protective covering 1) Cowl 
A cowling is the covering of a vehicle`s engine, most often found on automobiles and aircraft. A cowling may be used: Examples in aviation include the NACA cowling and Townend ring. ...
The hull of the bobsleigh, usually made of fibreglass.
NACA cowling on a Curtis AT-5A at the Langley Memorial Aeronautical Laboratory, October 1928 A removable metal covering that houses the engine and sometimes also a portion of the fuselage of an aircraft that is powered by a radial engine. It enables the aircraft to fly more efficiently because i...
A specially shaped nose to enclose an engine
A metal cover enclosing the whole or part of the power unit of an aero engine.
See Nacelle.
a streamlined metal housing or removable covering for an engine, esp. an aircraft engine, often part of or forming a continuous line with the fuselage or wing.