Core engine costs can be high due to the use of exotic materials, especially in applications where high reliability is required (e.g. aircraft propulsion) Less efficient than reciprocating engines at idle speed. Longer startup than reciprocating engines. Less responsive to changes in power demand compared with reciprocating engines. Characteristic whine can be hard to suppress. The exhaust (particularly on turbojets) can also produce a distinctive roaring sound.
Core engine costs can be high due to the use of exotic materials, especially in applications where high reliability is required (e.g. aircraft propulsion) Less efficient than reciprocating engines at idle speed. Longer startup than reciprocating engines. Less responsive to changes in power demand compared with reciprocating engines. Characteristic whine can be hard to suppress. The exhaust (particularly on turbojets) can also produce a distinctive roarin?g sound.