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Aviation History
1956
1956 - 0129.PDF
3 February 1956 129 Supermarine's New Fighter—the Naval N.I 13 "THE officially approved photographs above are the first to be*- released of the Supermarine N.I 13, a new deck-landing single- seat fighter/bomber, now in production as a replacement for theHawker Sea Hawk. The genesis of the type is traced by compara- tive pictures at the foot of the page, the two upper views show-ing the N.113's immediate predecessor, the Type 525, and the lower ones the straight-wing Type 508/529. It will be seen thatcompared with the Type 525 the N.I 13 has a lengthened, pointed nose; and it would appear that the intakes are of increased area,suggesting higher thrust from the flank-mounted Rolls-Royce Avons. There is no evidence of afterburning. A maker's statementremarks that the new machine has the saw-tooth leading edge (first introduced in this country on the Swift) and an all-movingtail. Eventually the new fighter will benefit from "super-circula- tion," a system whereby air ducted from the Avon compressorsis blown over the upper surfaces of the flaps to increase the lift by local acceleration of the airflow. Armament is likely to be acombination of 30 mm Aden guns and guided missiles, and it has been officially disclosed that an atomic bomb is a possible load.Note how a single intake is located at the commencement of the prominent "spine" and how the numerous small dorsal intakeswhich marred the lines of the 525 have been suppressed. The N.113 made its first flight, of 15 min duration, on January20th at the Aeroplane and Armament Experimental Establish- ment, Boscombe Down. Lt-Cdr. M. J. Lithgow, newly appointeddeputy chief test pilot of Vickers-Armstrongs (Aircraft), Ltd., was at the controls. Editorial comment on the N.113 appears on page 127.
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