The F-22 gets its power
from two Pratt & Whitney F119-PW-100 advanced technology
reheated jet engines. The F119-PW-100 is the most powerful
fighter jet engine ever designed, with a maximum thrust of
39.000 lb. (155 kN).
The F-119 has a three stage fan, a six stage compressor
and single stage low and high pressure turbines. Throughout
the fan and compressor, the disks and blades are one-piece
components. The large, hollow Titanium first-stage blades
are made separately and then joined to the disk by friction
wielding, a technique in which the blade is rubbed so
hard against the disk that it bonds together.
The 2-dimensional vectoring nozzles can divert the full
augmented thrust 20 degrees op- or downward in a fraction
of a second for enhanced performance and maneuverability.
The special nozzle shape provides the aircraft with the
required stealth characteristics when viewed from the
rear. As the image clearly shows, the exhaust flame can
move up and down, enabling the aircraft to perform an
AOA (Angle of Attack) of over 60 degrees.
On paper the F-22 is slower than most of today's fighters.
Maximum speed is set by airframe temperatures and by the
use of fixed geometry air inlets. This because variable
inlets are hard to make stealthy. However, the F-22 is
able to attain its maximum speed (around mach1.8) with
all weapons and most of the fuel; something which no other
fighter is capable of.
Without afterburning
the F-22 is 50% faster than any other fighter flying at
this moment and capable of so-called supercruising; flying
up to speeds of mach 1.5 without using afterburner.
Here is another image of the jet engine what it looks like
before it is inserted into the F-22's fuselage.
