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Aviation History
1956
1956 - 1515.PDF
71 of the aircraft. Among these may be listed a lightweight, dupli-cated hydraulic system operating at no less than 3,000 lb/sq in; fully powered controls with artificial feel; integral tankagethroughout; and an extremely sophisticated and highly developed structure. Power is provided by an advanced model Rolls-RoyceAvon with afterburner, which is now in production—together with earlier-type Avons for the two-seater Lansen—at the SvenskaFlygmotor factories. In the accompanying photographs three of the developmentDrakens can be seen. It is of interest to note that they now have triple fences on the underside of each wing and a thickened innertrailing edge; also visible are the ports for what are presumably fixed guns in the leading edge of the wing, one immediately out-board of the kink and the other halfway along the acutely swept portion. (Depending on the armament carried, the gross weightvaries between eight and nine tons.) A particularly curious feature is the vertical aerodynamic surface mounted dorsallyahead of the fin; while the reason for this may be purely aero- dynamic, it is more probably some kind of aerial. Development of the Draken has undoubtedly been the biggesttask that the Swedish industry has yet faced. It has been carried to a most successful conclusion and the machine is now in fullproduction for the Royal Swedish Air Force, in which service it will bear the designation J 35. Three of the prototypes wererecently publicly demonstrated, and their excellent short-field behaviour and flashing performance—including level flight atspeeds well in excess of Mach 1—showed that the machine is a remarkably good compromise.
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