United States Air Force (USAF) Advanced Tactical Fighter (ATF), although Replica was developed independently of either of these aircraft. To fulfill the stringent requirements of the FOAS programme, Replica is believed to have been designed with provisions to accommodate an internal weapons bay, capable of carrying both ASRAAM air-to-air missiles for self-defence purposes and a number of laser-guided bombs within the 2, 000 lb range. Tempest At the 2018 Farnborough Air Show, BAE Systems unveiled a mock-up of a proposed future combat aircraft, named Tempest. The mock-up bore a strong resemblance to the Replica test model. Specifications Length: (Estimated) 20.8 metres ( 68.32 Ft) Wingspan: (Estimated) 15.3 metres ( 50.34 ft) Height: (Estimated) 4.8 metres ( 15.74 ft ) Wing area: (Estimated) 104 m2 ( 1120 ft2) Max take of weight : unavailable Max speed : unavailable References United Kingdom defence procurement BAE Systems research and development Cancelled military aircraft projects of the United Kingdom