Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. The Short SA.4 Sperrin (named after the Sperrin Mountains, a range of hills in Northern Ireland) was a British jet bomber design of the early 1950s built by Short Brothers and Harland of Belfast, popularly abbreviated "Shorts". It first flew in 1951. The design had always been a fall-back option in case the more advanced jet designs of the V-bombers were delayed, and it was not put into production because these swept-wing designs (such as the Vickers Valiant) were by then available. The Sperrin prototypes were however valuable for research data on large jet aircraft.

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