Editing Lockheed F-104 Starfighter (section)

===Engine===
[[File:F104Engine.JPG|thumb|alt=close-up of aircraft engine exhaust|Detail of F-104G's [[General Electric J79|GE J79]] turbojet exhaust (red coloring added by [[Technik Museum Sinsheim]], Germany)]]

The F-104 was designed to use the General Electric J79 turbojet engine,<ref name="Donald1997p578">Donald 1997, p. 578.</ref> fed by side-mounted intakes with fixed [[inlet cones]] optimized for performance at [[Mach (speed)|Mach]]&nbsp;1.7 (increased to Mach&nbsp;2 for later F-104s equipped with more powerful J79-GE-19 engines).<ref name="Davies2014p10">Davies 2014, p. 10.</ref> Unlike some supersonic aircraft, the F-104 did not have variable-geometry inlets; instead at high Mach numbers excess air was bypassed around the engine. This bypass air also helped cool the engine. Its thrust-to-drag ratio was excellent, allowing a maximum speed well in excess of Mach&nbsp;2. Available thrust was actually limited by the geometry of the inlet scoop and duct; the aircraft was capable of even higher Mach numbers if the aluminum skin of the aircraft were able to withstand the heating due to air friction. Furthermore, speeds above Mach&nbsp;2 quickly overheated the J79 engine beyond its thermal capabilities, which resulted in the F-104 being given a design airspeed limitation of Mach&nbsp;2.<ref name="Upton2003pp24–25">Upton 2003, pp. 24–25.</ref>

The engine consisted of a 17-stage compressor, an [[accessory drive]] section, an annular combustion chamber, a three-stage turbine, and an afterburner. The most powerful version of the J79, the J79-GE-19, was rated at {{convert|52.8|kN|abbr=on}} dry thrust and {{convert|79.6|kN|abbr=on}} with afterburner. Bleed air from the compressor's 17th stage was used for a number of purposes: the BLCS, cabin pressurization and air conditioning, hot-air jet rain removal, fuel transfer, canopy and windshield defogging and defrosting, pressure for the pilot's [[pressure suit|anti-G]] suit, pressurization and cooling of the nose-mounted radar equipment, and purging of gas from the M61 autocannon. The accessory drive ran two hydraulic pumps, two variable-frequency generators, the generator for the tachometer, and pumps for engine fuel and oil.<ref name="Dobrzyński2015pp108,112,114">Dobrzyński 2015, pp. 108, 112, 114.</ref><ref name="Upton2003p30">Upton 2003, p. 30.</ref>