Wednesday, 6 May 2020

The Mudhen Returns To Mideast



Historical Background
The F-X fighter programme which resulted in the McDonnell Douglas F-15 Eagle was specifically tailored for air superiority mission with little consideration for air to ground missions (hence the phrase 'not a pound for air to ground'). The opposition by the F-15 Special Project Office in The Pentagon caused McDonnell Douglas to quietly work on the interdiction version of the Eagle envisioning it as a replacement for the F-111, the (then) remaining Phantoms and to augment existing Eagles. In 1978, the USAF initiated the Tactical All-Weather Requirement Study (TAWRS) which, amomng others, looked at McDonnell Douglas's proposal. The study recommended that the Eagle as the USAF's future strike platform and in 1979, McDonnell Douglas and Hughes teamed up to develop the F-15's air-to-ground capabilities. An F-15B, serial number 71-0291 was modified to act as a demonstrator and was first displayed at the Farnborough Air Show in 1980.

In March 1981, the USAF announced the Enhanced Tactical Fighter (later renamed Dual-Role Fighter) programme to procure a replacement for the F-111. The programme envisioned an aircraft capable of flying deep air interdiction missions without additional electronic support and fighter escort. McDonnell Douglas submitted its now-named F-15E while General Dynamics submitted the F-16XL. After a lengthy evaluation programme, the F-15E was chosen as the winner on 24 February 1984. Key factors in the selection of the F-15E over the F-16XL include lower development costs, belief that the F-15E had future growth potential and twin-engine redundancy. The first officially-completed F-15E was first flown on 31 March 1987 and the first production aircraft was delivered to the 405th Tactical Training Wing at Luke AFB, Arizona in April 1988. The USAF contracted for a total of 400 F-15Es (later revised to 392).

The F-15E Strike Eagle, although optimized for air-to-ground missions, retains the full air-to-air combat capabilities of the original Eagle. Although the prototype was basically a modified F-15B, production F-15Es have significant structural changes and using much more powerful engines (originally Pratt & Whitney F100-PW-220 rated at 105.7 kN with afterburner, later the Dash 229 version rated at129.7 kN with afterburner). The rear cockpit position is 'missionised' to allow the WSO to work the air-to-ground avionics (while still having flight controls, allowing the WSO to pilot the aircraft should it become necessary). Conformal Fuel Tanks (CFTs), containing 2,800 liters of fuel (in addition to the original  internal tankage) on either sides of the fuselage gave the Strike Eagle its long legs at a slight cost in drag and performance. The APG-70 radar system incorporates Doppler Beam Sharpening, Mapping and Synthetic Aperture Radar modes to enhance operational capabilities. One feature of the system is that it can 'freeze' the air-to-ground radar map and then goes back to air-to-air mode to check for aerial threats. In addition, the WSO is able to designate ground targets while the pilot engages aerial targets. The APG-70 was replaced by the APG-82 AESA radar beginning in 2014.

The F-15E carries most air-to-ground weaponry in the USAF inventory, from 'dumb' Mk 80 series bombs to precision strike JDAMs. Since it inherits the original Eagle's counter-air capabilities, they regularly carry air-to-air missiles and trained for counter-air missions. Precision delivery of weapons by day or at night and in poor weather was made possible by the use of LANTIRN pods mounted externally. The targeting pod (AN/AAQ-14, AN/AAQ-28 LITENING or AN/AAQ-33 Sniper Advanced Targeting Pod) contains a laser designator that can mark an enemy's position from as far away as 16 kilometers. The AN/AAQ-13 navigation pod  contains a terrain-following radar to allow the aircraft to fly safely at very low altitude and it even allows a hands-off terrain-following capability. The pod also contains a FLIR for night or low-visibility flight conditions. Tactical Electronic Warfare System (TEWS) integrates all the countermeasures available (RWR, chaff, flare, radar jammer). An AN/ALQ-131 ECM pod can be carried if required.

The F-15E, dubbed Strike Eagle (or more popularly, the Beagle ('bomb eagle') or Mud Hen) achieved initial operational capability on 30 September 1989 with the 336th Tactical Fighter Squadron of the 4th Tactical Fighter Wing at Seymour-Johnson AFB, North Carolina. The Strike Eagles were first deployed for combat during Operation Desert Storm conducting diverse targets, from mobile Scud missile launchers to fortified bunkers. They were also involved in 'tank plinking' attack missions prior to the start of the Coalition's ground offensive. An air-to-air 'kill' was scored on 14 February 1991, when an F-15E hit a flying/hovering Mil Mi-24 with a GBU-10 laser-guided bomb. USAF F-15Es continue to be deployed in various operations such as during Operations Northern & Southern Watch, Operation Deny Flight, Operation Enduring Freedom, Operation Iraqi Freedom, Operation Odyssey Dawn and Operation Inherent Resolve.

The Strike Eagle also enjoyed export success with variants being sold to Israel (F-15I Ra'am), South Korea (F-15K Slam Eagle), Saudi Arabia (F-15S/SA) , Singapore (F-15SG) and Qatar (F-15QA). Proposed variants include F-15SE Silent Eagle incorporating internal weapons carriage and use of radar-absorbent materials. Israel and Saudi Arabia have also used their Beagles in combat.

The Kit
Despite being in service since 1989, the F-15E received a rather cool attention from model kit companies. The 1/48 fraternity is quite well served with a number of kits depicting the E version but the 1/72 community was less so with the prototype-feature kit from Hasegawa (who then, true their policy, re-released it a number of times). The same goes with Airfix, Academy and Italeri. In 2011, Fujimi came up with a new-tool Beagle. While having all the 'E' features, it unfortunately suffered by being overscale, something around 1/66 rather than 1/72. In 2012, Hasegawa finally decided to do a new-tool F-15E in 1/72 scale. And now we have a relative newcomer, Great Wall Hobbies with their rendition and I think this kit is a worthy rival to the Hasegawa kit. First impression is good with parts displaying crisp recessed lines and nice (for 1/72 and in plastic) raised details. Unlike Hasegawa the GWH offering has a more contemporary ordnance to be hung beneath the model. Decals provide markings for three aircraft:
1. 87-0173 'Shark Mouth', 391st Fighter Squadron 'Bold Tigers', 366th Fighter Wing, Mountain Home AFB, 2002
2. 87-0169 'Tiger Lead', 391st Fighter Squadron 'Bold Tigers', 366th Fighter Wing, Mountain Home AFB, 2002
3. 89-0488 ' 336th Fighter Squadron 'Rocketeers', 4th Fighter Wing, Al-Udeid AB, Qatar 2003.

Construction
As usual with aircraft kits, construction started at the cockpit. The seats while having better details than kit-supplied parts of yore, still cannot compete against resin aftermarket ones. nevertheless I still used them for this build.  The cockpit features nice raised details, which although not mentioned, must be sanded off if one wants to use the decals for the instrument panels. I just applied them over the riased details. Also, GWH forgot to mention in their instructions about two further decals that needed to be placed for the WSO's office  And, as per my usual style, the parts for the cockpit were painted while still on their sprues. After the cockpit has been compeleted, the forward fuselage halves were closed together. While the forward bulkhead was used, I left off the radar parts as they won't be visible anyway. Modelling clay was then filled into the nose cavity to act as ballast, just in case. The intake tunnels have the vanes inside it but there are no actual locating holes and I opted not to add them.

GWH thoughtfully include the steps to build the model in flying pose so take note of the relevant parts to build the model with its wheels down. The main upper fuselage was assembled and was the attached to the lower fuselage/FAST pack. However GWH did not indicate holes to be drilled for the pylons (although I should have known better). I managed to pry back the wings and drilled the holes underneath the wings but it was too late for the fuselage bottom. The forward fuselage was the jointed to the main fuselage. The fairing behind the cockpit was then added. and, almost predictably, resulted in a number of seams. The exhausts were left off at this time. The fin tips are needlessly separate. The tangential pylons are butt-jointed to the sides - there are engraved marks to help you. Funnily enough, the instructions ask you to drill holes for them. Thankfully, holes have already been pre-drilled for the long pylons. The tabs to mount ordnance were however removed from most of the  pylons.

Painting and Decalling
While fighter Eagles were painted two-tone greys, the 'Bomb Eagle' was painted a uniform dark grey, specifically, FS 36118 Gunship Grey. The paint used was Vallejo AIr 71.097. The metallic end of the fuselage was painted Tamiya TS-30 Silver Leaf with certain parts were painted Mr. Color Super Titanium or Super Iron 2. The exhaust petals were painted Gunze Burnt Iron while the insides were painted Flat White. The ordnance were painted Olive Drab although somewhat bafflingly GWH suggested Gunship grey for the GBU-15. After the paint has dried, it was time for the decals. My selection is somewhat affected by the rather arbitrary weapons load selection suggested by GWH, which I think was influenced by the now-defunct F15e.info website. As I wanted to have a rather 'heavy' load, the third option was taken. The decals looked rather thick and several stencil decals shared the same carrying film. While somewhat shortening the decalling proces in theory, one might end up with large patches of silvering. I end up cutting up most of them into separate pieces, leaving just the decals for some 'No Step' stencils and the group on both sides of the cockpit.

Another issue with decals is concerned with the coloured strip at the top of the fins. GWH printed them in a way that they are all of the same orientation. Two of the four need to be printed facing the same side with the other two on the decal sheet. The way they are actually printed, the decals for the port fin inner right fin outer could not be used and I had to paint the relevant strips.  The decals were then bedded down with an application of Mr. Mark Softer. The panel lines between the control surfaces and the body were enhanced using AK Interactive Paneliner while the rst of the panel lines were slightly enhanced using a pencil. The inside of the exhausts were then weathered using Tamiya Modeling Master Soot.

Finishing
I started by assembling the landing gears. As usual in 1/72 and with models of modern planes, they are quite fiddly during assembly. After  being painted and weathered, they were attached to the model. Fit is quite tight and I ended up having a splayed main landing gears. After some trimming, they are now straight, perpendicular to the fuselage. Also, GWH moulded the main wheel tyres 'weighted'. However the instructions mis-pair the wheel halves and you might end up having a flat spot at the top of on one half of the wheel. Once the model stands on its legs, I added the weapons, pods and external tanks. I however use the Sidewinders and an AMRAAM from Hasegawa's US Aircraft Weapon Set V. The GBU-15 can easily be converted into AGM-130 simply by using adding part (which was marked as 'not used' in the instructions. If you still want have the weapon as a GBU-15, fill the holes at the bottom of the bomb. Next up is the canopy. I forgot to mention that there is a gap between the windscreen and the fuselage which needed filling. There was no problem encountered when fitting the canopy to the fuselage but by this time you realise that the tranparencies are pretty thick, especially when the canopy is in the open position. Finally the blade aerials were fitted and the build is finished.

Conclusion
The kit itself does not have any deal-breaker or any noticeable shortcomings and is a good alternative to the Hasegawa kit. The instructions however is a different matter and suffer from a number of mistakes. It probably wouldn't faze seasoned modellers but would probably cause some problems to newcomers to the hobby. Also the GWH kit, like the Hasegawa kit, only provide markings and ordnance and sensor options appropriate to the Operation Enduring Freedom / Operation Iraqi Freedom era (like clearly stated in the kit's sub-title). Aftermarket stuff were needed to to display the model in a more contemporary setting.

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