page_title: List of Harrier variants
section_title: Hawker Siddeley P.1127
hierarchical_section_title: List of Harrier variants / Hawker Siddeley P.1127
context_page_description: This is a list of variants of the Harrier Jump Jet family of V/STOL ground attack fighter aircraft.
context_section_description: P.1127
  Experimental V/STOL fighter, two prototypes and four development aircraft.
  Kestrel FGA.1
  Aircraft for the tripartite evaluation squadron, nine built, six later transferred to the United States where they were designated XV-6A.
  P.1127 (RAF)
  Development V/STOL ground attack and reconnaissance fighter, six built as pre-production evaluation aircraft before the type was ordered into production as the Harrier GR1.
  XV-6A
  United States military designation for the six Kestrel FGA.1 transferred to the United States.
  VZ-12
  United States Army designation for two P.1127 development aircraft, not delivered.
caption: Prototype Hawker P.1127 XP831 in 1962
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