 The Blackburn B @-@ 48 Firecrest , given the SBAC designation YA.1 , was a single @-@ engine naval strike fighter built by Blackburn Aircraft for service with the British Fleet Air Arm during World War II . It was a development of the troubled Firebrand , designed to Air Ministry Specification S.28 / 43 , for an improved aircraft more suited to carrier operations . Three prototypes were ordered with the company designation of B @-@ 48 and the informal name of " Firecrest " , but only two of them actually flew . The development of the aircraft was prolonged by significant design changes and slow deliveries of components , but the determination by the Ministry of Supply in 1946 that the airframe did not meet the requirements for a strike fighter doomed the aircraft . Construction of two of the prototypes was continued to gain flight @-@ test data and the third was allocated to strength testing . The two flying aircraft were sold back to Blackburn in 1950 for disposal and the other aircraft survived until 1952 . 
 The Blackburn B @-@ 48 Firecrest , given the SBAC designation YA.1 , was a single @-@ engine naval strike fighter built by Blackburn Aircraft for service with the British Fleet Air Arm during World War II . It was a development of the troubled Firebrand , designed to Air Ministry Specification S.28 / 43 , for an improved aircraft more suited to carrier operations . Three prototypes <a href='uninflect' title='1'><mark>were</mark></a> ordered with the company designation of B @-@ 48 and the informal name of " Firecrest " , but only two of them actually flew . The development of the aircraft was prolonged by significant design changes and slow deliveries of components , but the determination by the Ministry of Supply in 1946 that the airframe did not meet <a href='None' title='2'><mark>the</mark></a><a href='negative_concord' title='3'><mark>requirements</mark></a> for a strike fighter doomed the aircraft . Construction of two of the prototypes was continued to gain flight @-@ test data and the third was allocated to strength testing . The two flying aircraft <a href='uninflect' title='4'><mark>were</mark></a> sold back to Blackburn in 1950 for disposal and the other aircraft survived until 1952 . 
The Blackburn B @-@ 48 Firecrest , given da SBAC designation YA.1 , was a single @-@ engine naval strike fighter built by Blackburn Aircraft fa service with tdaBritish Fleet Air Arm durin World War II . It was a development of the troubled Firebrand , designed to Air Ministry Specification S.28 / 43 , ffiran improved aircraft more suited to carrier operations . Three prototypes was ordered with the company designation of B @-@ 48 and thdanformal name of " Firecrest " , but only two of em actually flew . Thedavelopment of the aircraft was prolonged by significant design changes and slow deliveries of components , but the daermination by the Ministry of Supply in 1946 dat the airframe did not meet no requirements for a strike fighter doomed the aircraft . Construction of two of the prototypes was continued to gain flight @-@ test data and the third was allocated to strength testing . The 2 flying aircraft was sold back to Blackburn in 1950 ffadisposal and the other aircraft survived until 1952 .