Wow wee have there been some ripper submissions so far. Well, here's my go at it, first FD scale drawing I've done from scratch as well. I've based it off some ideas I got from an academic paper on the use of thrust-vectoring for STOL operations.
WAC/Hawker Siddley Thresher
Whilst the Westralian defence industry was always known for its shipbuilding over aircraft manufacturing, a number of aircraft designs emerged from the government-owned Westralian Aircraft Consortium over the course of its five-decade history, though to little success. The most notable of these was the export-oriented Thresher light naval fighter/interceptor. Designed in partnership with Hawker Siddley, the Thresher was an attempt to provide a fighter/interceptor for the light carrier concepts emerging in the 1970s. Whilst at first appearance the Thresher looks like another STOVL design, it was actually strictly oriented towards STOL operations, incapable of vertical takeoffs and landings. Using a combination of vectored thrust and high-lift devices to reduce approach speeds to roughly 70-80kts, the Thresher was required to be able to take off with the assistance of a ski-jump and land within 500ft, just enough to operate from smaller carriers such as the British Invincible class. With the use of heavy-duty main-gear braking and limited thrust reversal, it was intended to avoid the requirement for arresting gear whilst avoiding some of the compromises of vertical landings such as that used by the Sea Harrier.
Design work began in 1976, and by 1981 the first airframe had been completed. However, this prototype served more as a technology demonstrator, owing to the intended engine, a bespoke variant of the Rolls Royce RB422, having yet to be completed. In its place, a modified Pegasus 11 with the rear vectoring nozzles replaced with a conventional fixed single nozzle was utilised to demonstrate the concept of vectored fan thrust to reduce takeoff and landing speeds and hence distances. In 1983, a second prototype fitted with a Pratt and Whitney F100 and dummy vectored nozzles first flew, being used to test the projected supersonic and aerodynamic performance of the aircraft. It was not until 1985 that the first RB422 fitted aircraft flew and the complete testing of the design could commence. Despite there having been some interest in the design, especially from the RAN and RAAF before the purchase of an Invincible class carrier cancelled, no orders had yet been received. However, following positive progress during testing, the Westralian government ordered the construction of an initial 12 production aircraft in 1987, a move of confidence in the design, on top of the now 4 pre-production aircraft and 4 prototypes, anticipating that an order would come soon and these aircraft could be used to help fulfill that. However, by 1989, no orders had come through, and the Westralian government was forced to integrate the already built aircraft (7 at this point) into the RWAF. The 12 aircraft completed served within 7 Sqd. for a severely truncated service life, being retired in 1996 along with 16 of the 48 F-14s as a part of wider budget cuts. The Thresher would ultimately never get to operate from a carrier, despite being designed specifically for naval usage, and contributed to the rationalisation and subsequent divestiture of the Westralian Aircraft Consortium.
In terms of performance, the Thresher largely met its goals, much in thanks to the substantial amount of power available from the RB422, roughly 35,000lb thrust wet. Due to some of the aerodynamic compromises required of slower flight, maximum speed was considerably lower than contemporary interceptors, with a maximum Mach of around 1.6 at 35,000ft, or roughly 1,700km/h. This was, however, considerably better than the performance of the subsonic Harrier. Turn performance was acceptable for the time, thanks to its large, low-loaded wing and strong thrust to weight ratio.
General Characteristics
Crew: 1
Length: 14.92m
Wingspan: 10.22m
Height: 4.13m
Empty Weight: 9,232kg
MTOW: 17,704kg
Powerplant: Rolls-Royce RB422 rated at 35,105lbf thrust wet, 26,340lbf dry
Performance
Max Speed: Mach 1.63 at 35 000ft, 1732km/h
Combat Radius: 670km with typical air-air loadout
Ferry Range: 3600km with two external fuel tanks
Service Ceiling: 50,000ft+
Rate of Climb: 47,000ft/min
Thrust/Weight: 0.89 at MTOW
Maximum G-Load: +8.5/-4g
Armament and Systems
Guns: Single Licence-Built ADEN 30mm in custom designed low-profile ventral gun pack (Zuytdorp ZM-30A), 65 rounds ammunition
Hardpoints: 2 wingtip, 4 under-wing (2 wet), 2 under-fuselage capable of 4800kg ordnance
Stores: AIM-9M, AIM-7M, ability to carry Mk. 82 and Mk. 84 iron bombs but never demonstrated in service
Radar: APG-65
FCS: Bespoke fly-by-wire system created by Zuytdorp Industrial Technology: ZT-502 E-FCS