British Aerospace Harrier II
- GR5
- The GR5 was the RAF's first second-generation Harrier. The GR5 differed from the USMC AV-8B in avionics fit, weapons and countermeasures. Forty one GR5s were built.
- GR5A
- The GR5A was a minor variant of the Harrier which incorporated changes in the design in anticipation of the GR7 upgrade.
- GR7
- The GR7 was an upgraded version of the Harrier GR5.
- GR7A
- The GR7A is a GR7 with an uprated Rolls-Royce Pegasus 107 engine. The Mk 107 engine provides around 3,000 lbf (13 kN) extra thrust than the Mk 105's 21,750 lbf (98 kN) thrust, increasing aircraft performance during "hot and high" and carrier-borne operations.
- GR9
- The Harrier GR9 is an avionics and weapons upgrade of the standard GR7.
- GR9A
- The Harrier GR9A is an avionics and weapons upgrade of the uprated engined GR7As. All GR9s are capable of accepting the Mk 107 Pegasus engine to become GR9As.
- T10
- The Harrier T10 is the original two seat training variant of the second-generation RAF Harrier. The RAF used the USMC trainer, the TAV-8B, as the basis for the design.
- T12
- The RAF needed trainers to reflect the upgrade of the GR7 to GR9. Nine T10 aircraft were to receive the JUMP updates under the designation T12, but retain the less powerful Pegasus 105 engine.
Read more about this topic: Harrier Variants
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