Soon after the failure to order the General purpose escort of the early 1960's, in 1964/66 the Royal Australian Navy started a design work for a light destroyer capable of defending it's shore waters from various hostile forces. The first designs showed a rather small sized vessel with two 5" guns one aft, one forward, and a helicopter deck of around 2000tons displacement barely larger than a frigate at the time. Over time the design evolved into a very capable destroyer with single 5" gun an RIM-66 Standard SAM, anti ship missiles and short range light AA guns. But like the previous programme the shifting requirements and poor project management by the Navy together with political pressure and increasing costs meant that these ships were never built and instead 4 (later another two home built) modified Oliver hazard Perry class Frigates were bought known as the Adelaide class.
The design the following characteristics:
Dimensions: 129,54 (wl), 137,16 (oa) x 14,6 x 6,7m
Displacement: 4.20tons (standard), 5.000tons (full load)
Engines: 50.000shp, 2 shafts, COGOG (Combined Gas Or Gas) Probably Rolls-Royce Olympus TM-3B & Tyne RM-1A gas turbines
Speed: 56km/h (30knots)
Range: 11.000km at 22km/h (5.900nm at 12knots)
Armaments:
1x1 127mm/54 Mark 19 Gun,
2x2 30mm/75 Mark 28 AA Guns, (Commonly known as Emerlec EX-75)
1x1 RIM-66 Standard MR Missile launcher,
6-8x Anti ship missiles (probably RGM-84 Harpoon)
2x3 324mm Torpedo Tubes
2x Westland WG-13 Lynx helicopters
More info can be found here:
https://en.wikipedia.org/wiki/Australian_light_destroyer_project
Based on these drawings:
http://www.shipmodels.info/mws_forum/download/file.php?id=22672&sid=65e1cde007f3714cf2563f68c5b939c9&mode=view
http://www.shipmodels.info/mws_forum/download/file.php?id=22673&sid=65e1cde007f3714cf2563f68c5b939c9&mode=view
and model:
http://www.shipmodels.info/mws_forum/viewtopic.php?f=67&t=54420