+++ DISCLAIMER +++
Nothing you see here is real, even though the conversion or the presented background story might be based historical facts. BEWARE!
Some background:
The Reno Air Races, officially known as the National Championship Air Races, is a multi-day event tailored to the aviation community that takes place each September at the Reno Stead Airport a few miles north of Reno, Nevada. Air racing is billed as "the world's fastest motor sport" and Reno is one of the few remaining venues. The event includes races in 6 classes and demonstrations by airshow pilots.
The probably most spectacular race class is the "Unlimited". With the exception of very few “scratch-built” aircraft, the Unlimited Class has generally been populated by stock or modified WWII fighters with the P-51 Mustangs, F-8F Bearcats and Hawker Sea Fury being flown most often, flying in speeds exceeding 500 mph.
One of the many P-51 custom racers was the "Gulf Mirage". It was a former military aircraft (ex s/n 44-73350), formerly operated by the Swiss Air Force and bought for around $3,500, that had undergone several successive modifications during its career in order to reduce the aircraft's drag and make it more and more competitive.
"Gulf Mirage" started its racing career in 1968 as an almost original P-51D which had been stripped off of any military equipment, under the ownership of Daniel Haskin, owner of Aeropart Service Inc. and WWII and Korea War pilot veteran. The aircraft's original name was "Mirage", with the civil registration N613C. The debut with the racing number 83 saw only a mediocre result, and, for the next season, the yellow and purple Mustang underwent its first major modifications.
These were carried out by Aero Trans Corp. DBA in Ocala, Florida, and included clipped wings and ailerons (the wing span was reduced by a total of ~5'), and the Mustang's characteristic tunnel radiator was replaced by two recessed radiators, which now occupied the former machine gun compartments in the wings. In this guide, the aircraft took part in the 1969 National Air Races, but severe cooling problems and numerous leaks in the almost untested radiator system prevented an active participation in the Unlimited Class races.
1970, "Mirage" was back, now tested and most technical bugs sorted out, and was able to achieve a respectable 4th place. In 1971, the modified Mustang was back, but during the main race a piston jammed and the aircraft could hardly be controlled - ending in a rugged belly landing after the landing gear had collapsed upon touchdown, which also caused a crack in the motor block.
However, the airframe was mostly intact, and Daniel Haskin started to search for sponsors for a rebuild and upgrade of "Mirage", as well as a new pilot. Through his industrial connections, he was able to win Grady Davis, vice president of Gulf Oil, who was an avid motorsport enthusiast and had founded the Gulf Oil Racing Team in 1966, for his project. In the course of 1972, "Mirage" underwent, thanks to financial and technical support, its second radical modification: the ruined Merlin engine was replaced by a bigger Rolls Royce Griffon (salvaged from an ex RAF Supermarine Spitfire PR Mk 19 reconnaissance aircraft) and its respective engine mounts, now driving a five blade propeller. The wing radiators were slightly enlarged in order to match the Griffon's increased power, and the aircraft was rebuilt with an eye to weight reduction. In the end, 600 pounds (270 kg) were removed from the airframe. The Mustang's original bubble canopy was replaced by a much smaller, streamlined fairing, and, after initial flight tests, the fin was slightly extended in order to counter the new propeller's torque and improve directional stability.
Outwardly, the new sponsorship resulted in a new name - the aircraft was now called "Gulf-Mirage" - a new, very different livery in the typical Gulf Racing colors: light blue with bright orange trim. With Peter Holm, a new pilot was found, too.
1973 saw the first start of the refurbished aircraft with the new starting number 63, but "Gulf-Mirage" did not finish its first race due to oil pressure problems, and any further flights were cancelled. In 1974 the pale blue Mustang was back - and this time everything worked fine and "Gulf-Mirage" was able to score a 3rd place in the Unlimited Class Gold Race. In 1975 the aircraft raced at the California National Air Races and finished in 2nd place - with a speed of 422 miles per hour (679 km/h).
After racing for several years with limited success, the aircraft was sold in 1983 to Wiley Sanders of Sanders Truck Lines, and it lost its characteristic blue and orange livery. After frequent participations in various air races, the aircraft was sold again in late 1989 and moved to the United Kingdom, not to return to the United States again until 1995. Since then, the aircraft has not made any public appearance yet.
General characteristics:
Crew: 1
Length: 32 ft 3 in (9.83 m)
Wingspan: 32 ft 6½ in (9.93 m)
Height: 13 ft 5 in (4.10 m; tail wheel on ground, vertical propeller blade.)
Wing area: 197.6 sq ft (18.42 m²)
Empty weight: 7,030 lb (3,194) kg
Loaded weight: 8,750 lb (3,972 kg)
Max. take-off weight: 11,450 lb (5,200 kg)
Powerplant:
1× modified Rolls Royce Griffon 65 supercharged V12,
with a race output of ~3,000 hp (2,160 kW) at low altitude
Performance:
Maximum speed: 473 mph (763 km/h) at 25,000 ft (7,600 m)
Stall speed: 100 mph (160 km/h)
Mach limit 0.82
The kit and its assembly:
This is another group build submission, this time the topic was “Racing and Competition” – and what’s more obvious than a (fictional) Reno Racer? The Mustang is a classic choice for the Unlimited Class, with many warbirds and some exotic, dedicated constructions with high-volume piston engines. I wanted something plausible, though, that perfectly blends into the class’ pedigree, so I took inspiration from different real P-51 racers and modified my build with whatever I considered plausible.
The basic kit is Academy’s P-51D, which I like because of its good fit, surface structure and nice details like the good cockpit and landing gear, as well as the option to build the model with lowered flaps. Just the tail wheel is IMHO a little short and needs an extension at its base for a proper stance of the model.
However, in order to turn the Mustang into a mutated Reno Racer and high speed aircraft, I gave it the following modifications – everything gathered from real-world Mustang modifications throughout the years:
Clipped wings, a traditional way to reduce drag and improve low altitude handling. I cut away about 1cm from each wing – and there have been more radical modifications in real life, even including the transplantation of swept wings from a Learjet! The original wing tips were retained, though, and slightly extended so that they would match with the slightly deeper, shortened wing.
The ventral radiator was cut away and faired over; instead, two smaller radiators were integrated into the wings where the machine gun bays had been, scratched from styrene sheet material. This was inspired by Anson Johnson’s Mustang N13Y, as flown in 1949.
The spacious bubble canopy was replaced by a much smaller hood. At first, I wanted to use a Spitfire or Typhoon bubble canopy, but, after some dry fitting tests, these were still too big for a radical racer. Eventually I came up with a weird combo: the cockpit glazing from an 1:100 Tamiya Il-28 bomber (which, unfortunately, turned out to be quite thick), extended rearwards with the rear section of an 1:72 Academy Fw 190 cockpit canopy/fairing. Both had to be tailored to match each other, as well as the Mustang’s different fuselage shape, and the cockpit opening itself in the fuselage had to be drastically made smaller, with the help of styrene sheet and lots of PSR.
The engine was upgraded from a V-1710/Merlin to a Griffon engine; this was pretty easy, thanks to the transplantation of conformal rocker cam fairings from a Special Hobby Spitfire kit: they almost match the cowling shape perfectly!
In order to create a more Griffon-esque look (using the Griffon-powered RB-51 “Red Baron” Mustang as benchmark), I made the original carburetor air intake under the propeller disappear and modified the lower cowling. A new carburetor intake was scratched from a piece of a small drop tank and placed further back, just in front of the landing gear wells. Looks very Spitfire-like now!
Additionally, a different propeller with more blade area was incorporated, a one-piece five-blade propeller from a Frog Spitfire Mk. XIV. The new piece was mounted onto a metal axis and a styrene tube adapter was inserted into the Mustang’s nose. Since the new propeller’s spinner came with a slight increase in diameter (overall maybe just 1mm, but it would be recognizable), the cowling was adjusted accordingly, realized through some PSR work.
As a visual counterbalance to the bigger nose section, the fin tip was slightly extended (maybe by 2mm) through the integration of a piece from a Special Hobby He 100.
Finally, the OOB pitot under the wing was replaced by a more delicate alternative made from thin wire, and no other antennae were fitted, for a sleek and clean look.
In the end, a lot of changes - but the overall effect is IMHO still subtle, and the whole thing looks quite plausible. And there had been more radical conversions in real life!
Painting and markings:
This started as a tough challenge, since I wanted a simple livery, yet something well-known from the Seventies. One option was a black “JPS Special” livery, but I eventually came across a very nice “Gulf Racing” sponsor markings set from A.C.B.-Shop, a German car model specialist. The team’s light blue and orange cars are still iconic and popular today, and why should Gulf Oil not even have sponsored a Reno Racer…?
Painting started with an overall coat of pastel blue from the rattle can – a generic tone from Duplicolor, which comes close to RAL 5024, but it’s less saturated. Initially I thought that the blue tone was just too pale, but things became more convincing once I added orange bands (Humbrol 18, it comes very close to the decals’ tone) to the wings and the fuselage, as well as to the nose section and the spinner. The latter received a chrome silver tip, created with Humbrol’s Polished Aluminum metallizer, which was also used on the blades’ front side. Their back side became black. Black was also used for a narrow anti-glare panel in front of the windscreen.
The cockpit interior became dark grey while the landing gear wells and covers were painted in zinc chromate yellow (Humbrol 81) – an ugly but deliberate contrast to the colorful exterior. The struts were painted in aluminum (Humbrol 56). As another color highlight, the wheel discs were painted in bright red – seen on a WWII Mustang, probably a personal addition of the pilot?
Once dry, the kit received a light black ink wash, in order to emphasize the engraved panel lines. Then orange sections received black rims, created with generic 2mm decal stripe material from TL Modellbau. The lowered flaps were a bit problematic, but the curved trim under the nose posed serious problems because the straight decal stripes had to be bent into curves. Thanks to some Gunze decal softener, this eventually worked – not perfect, but O.K. for what I wanted to achieve.
Next came the major sponsor markings and the race numbers. The Gulf logos came from the aforementioned decal set while the number was puzzled together with white decal circles from a Hasegawa Ki-61 (actually foundations for hinomaru with white borders!) and single numerals, which actually belong to contemporary Russian Air Force aircraft, from a Begemot sheet with generic tactical codes in various sizes.
In the scrap box I also found some sponsor decals (from a Heller 1:43 Lancia Delta), and some stencils were taken from an Academy P-47D sheet.
Finally, after some finishing touches, the kit was sealed with semi-gloss acrylic varnish from Italeri.
Well, the “Gulf-Mirage” looks simple and plausible, but in the end a lot of modifications were integrated that shift the Reno Racer away from the standard warbird. I am actually quite pleased with the outcome, because neither the technical modifications, nor the fictional/adapted Gulf Racing livery look out of place. The combo works well!