Extra Raptor

摘要

The USAF test fleet is to have an additional F-22A by the end of this year. The Raptor, 91-4006, is one of nine produced under the Engineering Manufacturing and Development (EMD) programme. It's currently equipped with Block 10 avionics but will be upgraded to Block 20 standard at a cost of $25m. Its hydraulic, electrical and flight control systems will also be improved before it returns to service with the 412th Test Wing's 411th Flight Test Squadron at Edwards AFB, California.