Sunday 27 November 2016

Cobras Of The Sea


Historical Background
The emergence of the helicopter, specifically of  Bell's UH-1 Iroquois or Huey, made the theory of air cavalry practical. In Vietnam, the Huey fleet carried troops across the country, to fight at the ground and the time of their own choosing, rather than the enemy's. However, these unarmed Hueys were vulnerable to ground fire especially when they are nearing the landing zones. Without support from nearby artillery or other ground troops, the only way to pacify the landing zones was from the air, using an aircraft, preferably another, armed, helicopter that can closely escort the transport choppers and loiter over the battlefield. Originally the Army used UH-1s fitted with machine guns and rocket launchers, but was needed was a dedicated helicopter gunship Bell has been investigating such concept since the 1950s and in 1962 had revealed a mockup of what they called D-255 Iroquois Warrior concept. The D-255 was a purpose-built attack helicopter based on the UH-1B but with a slender fuselage and the two crew sitting in tandem. It was to be armed with a turret-mounted 40mm grenade launcher in the nose, a 20mm belly-mounted gun pod and stub wings to mount rockets or anti-tank missiles.

The Army was interested and awarded a proof-of-concept contract to Bell in December 1962. Bell modified a regular Bell Model 47 (UH-13 Sioux) into Model 207 Sioux Scout which had the hallmarks of a modern attack helicopter with sleek fuselage, tandem cockpit, chin-mounted turret and stub wings for weapons. Although impressed, the Army decided that the Model 207 was too small, underpowered and generally not suitable for practical use. Instead the Army launched the Advanced Aerial Fire Support System (AAFSS) which resulted in the large and fast Lockheed AH-56 Cheyenne. It proved to be too sophisticated and was eventually cancelled in 1972. Although Model 207 was rejected by the Army, Bell persisted with their idea of a smaller and lighter helicopter gunship. Bell mated the T53 turboshaft engine, the transmission and the rotor system of the UH-1C, adding to the latter a Stability Control Augmentation System with the design philosophy of the Sioux Scout and produced the Model 209.

With the war escalating in Vietnam and the AAFSS programme stuck in technical difficulties and political bickering, the US Army asked Boeing-Vertol, Sikorsky, Kaman, Piasecki and Bell for an interim gunship design. In April 1966, Bell's Model 209 won the evaluation and a first production contract for 110 airframes were signed. Bell added 'Cobra' to the UH-1's nickname of 'Huey' becoming Model 209 HueyCobra - the name adopted by the Army for its production AH-1G. For production some modifications was made, including the adoption of simple landing skids instead of retractable undercarriage, a new wide-blade rotor and plexiglass, instead of armoured glass canopy. The first HueyCobras were delivered in June 1967. The USMC was very interested in this new aircraft but preferred a twin-engined version for better safety margin in over-water operations and also a more potent weapons in the turret. Although the Department of Defense balked at providing the USMC with a 'different' aircraft (as it viewed commonality outweighed the advantages of a twin-engined design), the Marirines had their say and awarded Bell a contract for 49 AH-1J SeaCobras in May 1968. The GAU-2 7.62mm minigun and/or M129 40mm grenade launcher of the M28 turret was replaced with a 20mm XM197 three-barrel cannon which was basically a 'halved' M61 Vulcan cannon.

In the 1970s, the USMC requested a greater load-carrying ability in 'hot and high' situations. Using Model 309 KingCobra as a basis, Bell developed the AH-1T. This model also have full TOW missile-firing capability. In the 1980s, the Marines sought to replace their SeaCobras with a navalised version of the AH-64 Apache but was denied funding by the Congress in 1981. In turn, they proposed a more powerful version of the AH-1T, designated AH-1W, called the SuperCobra which also incorporated the ability to fire AIM-9 Sidewinder AAMs, AGM-122 Sidearm anti-radiation missiles and AGM-114 Hellfire ASMs. Dubbed the SuperCobra or Whiskey Cobra, it started to enter service in 1986. A total of 179 new-built helicopters and 43 rebuilt AH-1Ts were delivered to the USMC with the last delivery taking place in 1998.

Marine SeaCobras first saw action in June 1972, interdicting the Ho Chi Minh Trail near Hon La Island. Their next action was during Operation Urgent Fury where two AH-1Ts were shot down, killing three crewmembers. The AH-1W first saw action during the Gulf War when 78 were deployed. They flew 1,273 sorties with no combat losses (although three were lost to accidents) and were credited with the destruction of 97 tanks, 104 APCs and other vehicles and two anti-aircraft sites. The SuperCobras continue to give support to the USMC to this day. In 1996, the USMC launched an H-1 helicopter upgrade programme which include upgrading 180 AH-1Ws into AH-1Z Viper standard, which was eventually declared combat ready in 2010. The SuperCobra was also exported to taiwan and Turkey.

The Kit
The 1/72 scale Italeri kit of the Whiskey Cobra came out in 1987, roughly a year after it entered service. The kit consists of 70 parts moulded in featured raised, but nice panel lines. The interior however is fairly basic and some external features specifically the various probes and aerials) were pretty oversized or crude. I'm not sure myself about the accuracy but I am pretty sure the Hellfires doesn't look the part with a more pronounced tapering and a rather suspect shape of the tail fins. The transparent parts were however very clear. The small decal sheet provide markings for just one machine. Without any unit identifying markings and codes, I believe this was one of the development, rather than an operational machines.

Construction  
As usual with aircraft model kits, construction started at the cockpit. As per my usual style, the parts and the sidewalls were painted while still on the sprue. They were painted overall XF-1 Flat Black while the seat cushions were painted XF-62 Olive Drab. And, no, I didn't bother cutting up masking tapes to make the seat belts. Before joining the fuselage halves together, I crammed 10 grams of ballast underneath the cockpit floor, as suggested by the instructions. The stabilators is a one-piece affair also need to be inserted between the fuselage halves. The next step was concerned with the engine fairing. The mounting for the rotor shaft was glued in place but I left the rotor shaft itself at this time to avoid breakage. The halves were joined together, and was followed by the air intake bits. I was quite impressed when I found that they fitted nicely, requiring no filling or sanding. The exhausts, although assembled, was left off to facilitate painting.

The engine fairing assembly, together with the stub wings were then cemented to the fuselage. To ease handling, the landing skids were also left off at this stage. The gunner's console was cemented into place. Taking caution from previous builds, especially of Tamiya's P-47 Thunderbolt, the gunner's sight was also set aside for the time being. The turret was assembled sans the cannon barrels, which can be added later. The Night Targeting System turret was assembled, also without problems and as with any other vulnerable parts, the thingie in front of the NTS was also left off. The electronics bay cheek fairings and the outboard pylon mountings were cemented before the model went for the painting stage.

Painting and Decalling
The SuperCobra model is presented in the fairly typical 1980s camouflage for the type. The model was painted overall FS 36375 Light Ghost Grey using Mr. Hobby H308. The USMC Green was painted using Tamiya XF-13 JA Green while XF-69 NATO Black was used for the black. The rocket pods were painted XF-62 Olive Drab with a band of silver at the ends of the tube. With hindsight, I probably should have painted the pods XF-13. The Hellfire missiles were also painted XF-62. The instructions just mentioned one single colour for them although photos show them having yellow  bands and/or squares on them. They were duly painted using XF-3 Flat Yellow but by this time, I got lazy and painted them freehand without masks, with predictable results! The rotor hubs were painted Steel while the rotor blades were painted XF-1 Flat Black. Cannon barrels were painted XF-69 NATO Black, after which graphite powder was applied. The decals were then applied with no problems. I just wished Italeri included a line bird rather than the development one for the markings as was done with their 1/48 kit of the SuperCobra. 

Finishing
I started the final leg by supergluing the landing skids into place, allowing the model to stand. The weapons were. The Hellfires were mounted first on their racks, which were then superglued to the wing pylons. But before that, being the innermost weapons, the rocket pods were cemented into place. The inner wing pylons do not have any alignment tabs, they were aligned using faint raised lines on the stub wings - pretty hard to see with the layer of paint over it. The cannon barrels were then stuck into place through the opening in the turret. The various aerials, cable cutters and the countermeasures dispensers were painted on the sprues before being placed on their respective places on the model. The canopy was then cemented to the model and in contrast to the rest of the kit, it had a bad fit on the left side. And, in my effort to place the canopy, stray cement managed to crept underneath my fingers, reulting in blemishes on the clear parts. Arghhh! Ak Interactive Paneliner for Grey Camo and Brown/Green Camo was then apllied. The model was then sprayed with a couple of layers of Tamiya Semi-Gloss Clear.


Conclusion

Italeri's 1/72 scale is a simple kit and can be the starter kit for those attempting to build their first helicopter model. As I mentioned elsewhere, I'm not sure about the accuracy but it does look like a SuperCobra to me. On the positive side, the parts fitted nicely and on the debit side, the most glaring ones are the shape of the Hellfire missiles and the lack of details in the cockpit. The raised panel lines is not really a problem (unless it causes you nightmares) although I think it is a bit thicker than the previous Italeri helicopters I built. In any case, this the only kit of the SuperCobra in 1/72 scale, being reboxed by Tamiya, Modelist and Testors.

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