+++ DISCLAIMER +++
Nothing you see here is real, even though the conversion or the presented background story might be based on historical facts. BEWARE!
Some background:
The McDonnell Douglas (now Boeing) T-45 Goshawk was a highly modified version of the BAe Hawk land-based training jet aircraft. Manufactured by McDonnell Douglas (now Boeing) and British Aerospace (now BAe Systems), the T-45 was used by the United States Navy and the United States Marine Corps (USMC) as an aircraft carrier-capable trainer.
The Goshawk's origins began in the mid-1970s, when the US Navy began looking for a single aircraft replacement for both its T-2 and TA-4 jet trainers. The US Navy started the VTXTS advanced trainer program in 1978. Several companies made submissions, e. g. North American or Northrop/Vought. Due to the size of the potential contract, European companies made submissions, too, including a navalized Alpha Jet from Dassault/Dornier and a fully carrier-capable version of the BAe Hawk Mk.60, mutually proposed by British Aerospace (BAe) and McDonnell Douglas (MDC). The latter eventually won the competition and BAe and MDC were awarded the T-45 contract in 1981.
The Hawk had not been designed for carrier operations and numerous modifications were required to make it suitable for use on carriers. These included improvements to the low-speed handling characteristics and a reduction in the approach speed. It was found that the aircraft was apt to stall at the low approach speed required. Modifications were designed by BAe in England; most notably a simple slat system was devised, operated by an actuator and linkage mechanism to fit into the small space available. Strakes were also added on the fuselage to improve airflow. Other changes were a strengthened airframe, a more robust and wider landing gear with a two-wheel nose landing gear, a catapult tow bar attachment and an arresting hook. The modified aircraft was christened “Goshawk”, flew in 1988 for the first time and became operational in 1991.
Beyond being a naval trainer the T-45 was also adapted for first-line duty with strike capabilities, in the form of the OA-45 for the USMC. The role of this aircraft dated back to the Vietnam War when twenty-three A-4 two-seaters were converted into OA-4Ms for “FastFAC” (Fast Forward Air Controller) missions, in order to control interdiction sorties dedicated to shaping the battlefield for future operations. Basically, the OA-4M was a TA-4F equipped with A-4M electronics. The most visible and characteristic change was the fitting of the A-4M’s dorsal electronics hump, neatly faired into the rear of the two-seat canopy. The nose sensor group of the OA-4M was basically the same as that of the A-4M, but the Angle/Rate Bombing system was not installed as it would not be needed.
When the T-45 was introduced in the early Nineties, the USMCs OA-4Ms had reached the end of their service life and the USMC started looking for a replacement, wanting a comparable, light and fast fixed-wing aircraft. The USMC did not accept the LTV A-7 as an A-4 replacement (even though a two-seater version was available), because it was already dated, too, and not part of the USMC inventory. The USMC's A-4Ms were supposed to be replaced by the VTOL AV-8 by the mid-nineties, but the AV-8, even as a two-seater, was deemed unsuitable for FFAC duties. The new T-45 looked like a good and economical alternative with future potential, since the airframe was brand new and the type's infrastructure was fully established, so that a small number of specialized aircraft could easily be supported without much extra cost.
With fresh experience from the 1st Gulf War in 1990-91 the decision was made to buy 25 extra T-45A airframes and convert them to OA-45A standard. Most important change were modified wings, using structures and systems from the BAe Hawk 100 series. While the T-45 only had two underwing and a single ventral hardpoint, the OA-45A featured a total of seven: four underwing and one ventral hardpoints, plus wingtip stations for defensive air-to-air missiles. Upgraded avionics allowed the deployment of a wide range of external stores, including air-to-ground missiles and rocket launchers, a reconnaissance pod, retarded and free-fall bombs of up to 1,000 pounds (450 kg) caliber, runway cratering, anti-personnel and light armor bombs, cluster bombs, practice bombs as well as external fuel tanks and ECM pods. This was a vital asset, since Desert Storm had proved that FFAC aircraft had to have an offensive capability to handle targets of opportunity on their own, when no air assets to control were available. A total ordnance load of up to 6,800 lb (3,085 kg) was possible, even though the aircraft was not supposed to play an offensive role and rather act from a distance, relying on its small size and agility.
Communication modifications for the FastFAC role included a KY-28 secure voice system, an ARC-159 radio and an ARC-114 VHF radio. Similar to the Skyhawk, a hump behind the cockpit had to be added to make room for the additional electronic equipment and a heat exchanger. Other additions were a continuous-wave Doppler navigation radar under a shallow ventral radome underneath the cockpit, a ground control bombing system, an APN-194 altimeter, an ALR-45 radar warning suite, a retrofitted, fixed midair refueling probe and cockpit armor plating that included Kevlar linings on the floor and the lower side walls as well as externally mounted armor plates for the upper areas.
VMA-131 of Marine Aircraft Group 49 (the Diamondbacks) retired its last four OA-4Ms on 22 June 1994, and the new OA-45A arrived just in time to replace the venerable Skyhawk two-seaters in the FastFAC role. Trainer versions of the Skyhawk remained in Navy service, however, finding a new lease on life with the advent of "adversary training". OA-45A deliveries were finished in 1996 and the 25 aircraft were distributed among the newly established Marine Aviation Logistics Squadron (MALS, formerly Headquarters & Maintenance Squadron/H&MS) 12 & 13. The USMC crews soon nicknamed their new mounts "GosHog", to underlöine ist offensive capabilities and to set themselves apart from the USN's "tame" trainers. Even though thos name was never officially approved it caught on quickly.
After initial experience with the new aircraft and in the wake of technological advances, the USMC decided to upgrade the OA-45As in 2000 to improve its effectiveness and interaction capabilities with ground troops. This primarily resulted in the addition of a forward-looking infrared camera laser in the aircraft’s nose section, which enabled the aircraft to execute all-weather/night reconnaissance and to illuminate targets for laser-guided infantry shells or ordnance launched by the OA-45 itself or by other aircraft. Through this measure the OA-45 became capable of carrying and independently deploying light laser-guided smart weapons like the GBU-12 and -16 “Paveway II” glide bombs or the laser-guided AGM-65E “Maverick” variant. The update was gradually executed during regular overhauls in the course of 2001 and 2002 (no new airframes were built/converted), the modified machines received the new designation OA-45B.
After this update phase, the OA-45Bs were deployed in several global conflicts and saw frequent use in the following years. For instance, MALS 13 used its OA-45Bs operationally for the first time in October 2002 when the squadron was tasked with providing support to six AV-8B Harrier aircraft in combat operations in Afghanistan during Operation Enduring Freedom. This mission lasted until October 2003, four aircraft were allocated and one OA-45B was lost during a landing accident.
On 15 January 2003, MALS 13 embarked 205 Marines and equipment aboard the USS Bonhomme Richard in support of combat operations in Southwest Asia during Operation Southern Watch. Four OA-45Bs successfully supported these troops from land bases, marking targets and flying reconnaissance missions.
Furthermore, six MALS 13 OA-45Bs took actively part in Operation Iraqi Freedom from Al Jaber Air Base, Kuwait, and An Numiniyah Expeditionary Air Field, Iraq, where the aircraft worked closely together with the advancing ground troops of the USMC’s 15th Marine Expeditionary Unit. They successfully illuminated targets for US Navy fighter bombers, which were launched from USS Abraham Lincoln (CVN-72) in the Persian Gulf, and effectively guided these aircraft to their targets. Two OA-45Bs were lost during this conflict, one through enemy MANPADS, the other through friendly AA fire. In late May 2003 the surviving machines and their crews returned to MCAS Yuma.
On 16 March 2007, the 200th T-45 airframe was delivered to the US Navy. From this final batch, six airframes were set aside and modified into OA-45Bs in order to fill the losses over the past years.
Later T-45 production aircraft were built with enhanced avionics systems for a heads-up display (HUD) and glass cockpit standard, while all extant T-45A aircraft were eventually converted to a T-45C configuration under the T-45 Required Avionics Modernization Program (T-45 RAMP), bringing all aircraft to same HUD plus glass cockpit standard. These updates, esp. concerning the cockpit, were introduced to the OA-45Bs, too, and they were re-designated again, now becoming OA-45Cs, to reflect the commonality with the Navy’s Goshawk trainers. Again, these modifications were gradually introduced in the course of the OA-45s’ normal maintenance program.
In 2007, an engine update of the whole T-45 fleet, including the OA-45s, with the Adour F405-RR-402 was considered. This new engine was based on the British Adour Mk 951, designed for the latest versions of the BAe Hawk and powering the BAe Taranis and Dassault nEUROn UCAV technology demonstrators. The Adour Mk 951 offered 6,500 lbf (29 kN) thrust and up to twice the service life of the F405-RR-401. It featured an all-new fan and combustor, revised HP and LP turbines, and introduced Full Authority Digital Engine Control (FADEC). The Mk 951 was certified in 2005, the F405-RR-402 derived from it was certified in 2008, but it did not enter service due to funding issues, so that this upgrade was not carried out.
The final delivery of the 246th T-45 airframe took place in November 2009, and both T-45 and the OA-45 "GosHog" are supposed to remain in service until 2035.
General characteristics:
Crew: 2 (pilot, observer)
Length: 39 ft 4 in (11.99 m)
Wingspan: 30 ft 10 in (9.39 m)
Height: 13 ft 5 in (4.08 m)
Wing area: 190.1 ft² (17.7 m²)
Empty weight: 10,403 lb (4,460 kg)
Max. takeoff weight: 14,081 lb (6,387 kg)
Powerplant:
1× Rolls-Royce Turbomeca F405-RR-401 (Adour) non-afterburning turbofan with 5,527 lbf (26 kN)
Performance:
Maximum speed: Mach 2 (2,204 km/h (1,190 kn; 1,370 mph) at high altitude
Combat radius: 800 km (497 mi, 432 nmi)
Ferry range: 3,200 km (1,983 mi) with drop tanks
Service ceiling: 15,240 m (50,000 ft)
Wing loading: 283 kg/m² (58 lb/ft²)
Thrust/weight: 0.97
Maximum g-load: +9 g
Armament:
No internal gun; seven external hardpoints (three on each wing and one under fuselage)
for a wide range of ordnance of up to 6,800 lb (3,085 kg), including up to six AIM-9 Sidewinder for
self-defense, pods with unguided rockets for target marking or ECM pods, but also offensive weapons
of up to 1.000 lb (454 kg) weight, including iron/cluster bombs and guided AGM-65, GBU-12 and -16.
The kit and its assembly:
This fictional T-45 variant is actually the result of a long idea evolution, and simply rooted in the idea of a dedicated OA-4M replacement for the USMC; in real life, the FFAC role has been transferred to F-18 two-seaters, though, but the T-45 appeared like a sound alternative to me.
There's only one T-45 kit available, a dubious T-45A from Italeri with poor wings and stabilizers. Wolfpack also offers a T-45, but it’s just a re-boxing of the Italeri kit with some PE parts and a price tag twice as big – but it does not mend the original kit’s issues… After reading the A-4 Skyhawk book from the French "Planes & Pilots" series, I was reminded of the USMC's special OA-4M FAC two-seaters (and the fact that it is available in kit form from Italeri and Hasegawa), and, cross-checking the real-world timeline of the T-45, I found that it could have been a suitable successor. The ide of the USMC’s OA-45 was born! :D
Building-wise the Italeri T-45 remained close to OOB, even though I transplanted several parts from an Italeri BAe Hawk Mk. 100 to create a different look. I modified the nose with the Mk. 100’s laser fairing and added some radar warning sensor bumps. This transplantation was not as easy as it might seem because the T-45’s nose is, due to the different and more massive front landing gear quite different from the Hawk’s. Took some major PSR to integrate the laser nose.
An ALR-45 “hot dog” fairing from a late A-4M (Italeri kit) was added to the fin, together with a small styrene wedge extending the fin’s leading edge. This small detail markedly changes the aircraft’s look. I furthermore added a refueling probe, scratched from coated wire and some white glue, as well as a low “camel back” fairing behind the cockpit, created from a streamlined bomb half with air outlets for an integrated heat exchanger. Blade antennae were relocated and added. A shallow bump for the Doppler radar was added under the fuselage behind the landing gear well – left over from an Airfix A-4B (from an Argentinian A-4P, to be correct, actually a dorsal fairing).
On the wings, a tailored pair of pylons and wing tip launch rails from the Italeri BAe Hawk Mk. 100 kit were added, too, as well as the donor kit’s pair of Sidewinders. The rest of the ordnance consists of drop tanks and LAU-19 pods for target marking missiles. The tanks were taken from the Hawk Mk. 100 kit, too, the rocket launchers came from an Italeri NATO aircraft weapons set. The centerline position carries an ALQ-131 ECM pod from a Hasegawa US aircraft weapons set on a pylon from the scrap box.
Painting and markings:
The low-viz idea prevailed, since I had some leftover OA-4M decals from Italeri kits in store, as well as some other suitable low-viz decals from a Revell A-4F kit. However, an all-grey livery was IMHO not enough, and when I came across a picture of a USN low-viz A-7E with an improvised desert camouflage in sand and reddish brown applied over the grey (even partly extending over its markings) from Operation Iraqi Freedom, I had that extra twist that would set the OA-45 apart. MALS-13 was chosen as operator because I had matching codes, and, as another benefit, the unit had actually been deployed overseas during the 2003 Iraq War, so that the whif’’s time frame was easily settled, adding to its credibility.
The livery was built up just like on the real aircraft: on top of a basic scheme in FS 36320 and 36375 (Humbrol 128 and 127) with a slightly darker anti-glare panel in front of the cockpit (FS 35237, I used Revell 57 as a slightly paler alternative) I applied the low-viz marking decals, which were protected with a coat of acrylic varnish. Next, additional desert camouflage was added with dry-brushed sand and millitary brown (supposedly FS 33711 and 30400 in real life, I used, after consulting pictures of aircraft from both Gulf Wars, Humbrol 103 (Cream) and 234 (Dark Flesh). They were applied with a kind of a dry-brushing technique, for a streaky and worn look, leaving out the codes and other markings. The pattern itself was inspired by an USMC OV-10 Bronco in desert camouflage from the 1st Gulf War.
On top of that a black ink washing was applied. Once things had thoroughly dried over night, I wet-sanded the additional desert camouflage away, carefully from front to back, so that the edges became blurred and the underlying grey became visible again.
The cockpit interior was painted in standard Dark Gull Grey (Humbrol 140), while the air intakes and the landing gear became white, the latter with red trim on the covers’ edges – just standard. Finally, the model was sealed with a coat of matt acrylic varnish (Italeri).
The upgraded T-45 is an interesting result. The add-ons suit the aircraft, which already looks sturdier than its land-based ancestor, well. The improvised desert paint scheme with the additional two-tone camouflage over the pale grey base really makes the aircraft an unusual sight, adding to its credibility.
Hardware-wise I am really happy how the added dorsal hump blends into the overall lines – in a profile view it extends the canopy’s curve and blends into the fin, much like the A-4F/M’s arrangement. And the modified fin yields a very different look, even though not much was changed. The T-45 looks much beefier now, and from certain angles really reminds of the OA-4M and sometimes even of a diminutive Su-25?
