Short SA.4 Sperrin   VX158


                                      The Sperrin was an experimental design designed to develop a strategic bomber, perhaps in the
                                      vein of the Boeing B-47 or Russian Tupolov Bear.   The aircraft had four Roll Royce Avon
                                      RA.2 engines mounted one above the other in two nacelles.  Although the project was eventually
                                      cancelled by the Ministry of Supply, the two prototypes did provide valuable data which was later
                                      used in good  in what would become the V-bombers.