Chevrolet Corvette (C1)
The Chevrolet Corvette is the first generation of the Corvette sports car produced by Chevrolet. It was introduced late in the 1953 model year and produced through 1962. This generation is commonly called the "solid-axle" generation, as an independent rear suspension did not appear until the 1963 Sting Ray.
The Corvette was rushed into production for its debut model year to capitalize on the enthusiastic public reaction to the concept vehicle. However, expectations for the new model were largely unfulfilled. Reviews were mixed, and sales fell far short of expectations through the car's early years. The program was nearly canceled by General Motors, but decided to make necessary improvements because Ford was developing a two-seater that became the Thunderbird.
History
Origins
As head of GM's Styling Section, Harley Earl was an avid sports car fan. He recognized that GIs returning after serving overseas in the years following World War II were bringing home MGs, Jaguars, and Alfa Romeos. In 1951, Nash Motors began selling an expensive two-seat sports car, the Nash-Healey, that was made in partnership with the Italian designer Pininfarina and British auto engineer Donald Healey, but there were few moderate-priced models. Earl convinced GM that they needed to build an all-American two-seat sports car, and with his Special Projects crew began working on the new car in late 1951. The last time Chevrolet offered a two-door, two-passenger convertible/roadster body style was in 1938 with the Chevrolet Master.Prototype EX-122
The secretive effort was code-named "Project Opel". The result was the hand-built, EX-122 pre-production Corvette prototype, which was first shown to the public at the 1953 General Motors Motorama at the Waldorf-Astoria in New York City on January 17, 1953. When production began six months later, at an MSRP of US$3,513, it had evolved into a considerably costlier car than the basic $2,000 roadster Harley Earl originally had in mind. The EX-122 car is now housed at the Kerbeck Corvette museum in Atlantic City. It is believed to be the oldest Corvette in existence.Design and engineering
The design and engineering team headed by Earl included body engineer Vincent Kaptur, Sr., draftsman Carl Peebles, clay modeler Bill Bloch, Tony Balthasar, and engineer Robert McLean, who laid out the unique chassis design. They utilized off-the-shelf mechanical components to keep costs down. The new car used the chassis and suspension design from 1949 through 1954 Chevrolet passenger vehicles. The drivetrain and passenger compartment were moved rearward to achieve a 53/47 front-to-rear weight distribution. It had a wheelbase. The engine was a inline six engine that was similar to the 235 engine that powered all other Chevrolet car models, but with a higher-compression ratio, three Carter side-draft carburetors, mechanical lifters, and a higher-lift camshaft. Output was rated at. A two-speed Powerglide automatic had to be used because no manual transmission was available to Chevrolet that could handle 150 HP. The acceleration time was 11.5 seconds.Three body variants were created. The roadster was built as the Corvette, the Corvair fastback variant never went into production, and the two-door Nomad station wagon was eventually built as the Chevrolet Nomad.
During the last half of 1953, 300 Corvettes were, to a large degree, hand-built on a makeshift assembly line that was installed in an old truck plant in Flint, Michigan, while a factory was being prepped for a full-scale 1954 production run. The outer body was made of then-revolutionary glass fiber reinforced plastic material. Although steel shortages or quotas are sometimes mentioned as a factor in the decision to use fiberglass, no evidence exists to support this. In calendar years 1952 and 1953, Chevrolet produced nearly two million steel-bodied full-size passenger cars, and the intended production volume of 10,000 Corvettes for 1954 was only a small fraction of that.
The body engineer for the Corvette was Ellis James Premo. He presented a paper to the Society of Automotive Engineers in 1954 regarding the development of the body. Several excerpts highlight some of the points in the body material choice:
The safety glass windshield was raked 55 degrees. The rear license plate holder was set back in the trunk lid and covered with a plastic window. Underneath the new body material were standard components from Chevrolet's regular car line, including the "Blue Flame" inline six-cylinder engine, two-speed Powerglide automatic transmission, and drum brakes. A Carter triple-carburetor system was exclusive to the Corvette, which increased the standard engine's output to 150 hp. Still, the performance of the car was decidedly "lackluster". Compared to the British and Italian sports cars of the day, the Corvette lacked a manual transmission and required more effort to bring to a stop, but like their British competition, such as Morgan, was not fitted with roll-up windows; this would have to wait until some time in the 1956 model year. A Paxton centrifugal supercharger became available in 1954 as a dealer-installed option, significantly improving the Corvette's straight-line performance, but sales continued to decline.
The Chevrolet division was GM's entry-level marque. Managers at GM were seriously considering shelving the project, leaving the Corvette to be little more than a footnote in automotive history, and would have done so if not for three important events. The first was the 1955 introduction of Chevrolet's first V8 engine since 1919. the new 265 small-block became available with a Powerglide automatic transmission, until the middle of the production year when a manual 3-speed became available, coupled to a 3.55:1 axle ratio, the only one offered. The engine was fitted with a single 2218S or 2351S WCFB four-barrel Carter carburetor. The combination turned the "rather anemic Corvette into a credible if not outstanding performer". The second was the influence of a Russian émigré in GM's engineering department, Zora Arkus-Duntov. The third factor in the Corvette's survival was Ford's introduction of the 1955 two-seat Thunderbird. The Ford model featured a V8 engine, was better equipped, and positioned more as a "personal car" rather than a pure sports car. Even so, the Ford-Chevrolet rivalry in those days demanded GM not appear to back down from the challenge. The original concept for the Corvette emblem incorporated an American flag into the design, but was changed before production because the flag cannot be used on a commercial product according to the United States Flag Code.
1953–1955
1953
The 1953 model year was not only the Corvette's first production year, but at 300 produced it was also the lowest-volume Corvette. The cars were essentially hand-built and techniques evolved during the production cycle so that each 1953 Corvette is slightly different. All 1953 models had red interiors, Polo white exteriors, and painted blue engines as well as black canvas soft tops. Order guides showed heaters and AM radios as optional, but all 1953 models were equipped with both. Over two hundred 1953 Corvettes are known to exist today. They had independent front suspension, but featured a rigid axle supported by longitudinal leaf springs at the rear. The cost of the first production model Corvettes in 1953 was US$3,490.The quality of the fiberglass body as well as its fit and finish were lacking. Other problems, such as water leaks and doors that could open while the car was driven, were reported with the most severe errors corrected in subsequent units produced, but some shortcomings continued beyond the Corvette's inaugural year. By December 1953, Chevrolet had a newly equipped factory in St. Louis ready to build 10,000 Corvettes annually. However, negative customer reactions to 1953 and early 1954 models caused sales to fall short of expectations.
1954
In 1954, a total of 3,640 of this model were built and nearly a third were unsold at year's end. New colors were available, but the six-cylinder engine and Powerglide automatic, the only engine and transmission available, were not what sports car enthusiasts expected. It is known that 1954 models were painted Pennant Blue, Sportsman Red, and Black, in addition to Polo White. All had red interiors, except for those finished in Pennant Blue which had a beige interior and beige canvas soft top. Order guides listed several options, but all options were "mandatory" and all 1954 Corvettes were equipped the same.In the October 1954 issue of Popular Mechanics, there was an extensive survey of Corvette owners in America. The surprising finding was their opinions in comparison to foreign sports cars. It was found that 36% of those taking the survey had owned a foreign sports car, and of that, half of them rated the Corvette as better than their previous foreign sports car. Nineteen percent rated the Corvette as equal to their foreign sports car and 22% rated the Corvette as inferior. While many were well pleased with the Corvette, they did not consider it a true sports car. The principal complaint of the surveyed owners was the tendency of the body to leak extensively during rainstorms.
1955
Chevrolet debuted its small-block, V8 in 1955 and the engine was available for the Corvette. Early production 1955 V8 Corvettes continued with the mandatory-option Powerglide automatic transmission. A new three-speed manual transmission became available later in the year for V8 models, but was not popular with about 75 equipped with it. Exterior color choices were expanded to at least five, combined with at least four interior colors. Soft-tops came in white, dark green, or beige and different materials. A total of 700 1955 Corvettes were built, making it second only to 1953 in scarcity. The "V" in the Corvette emblem was enlarged and gold colored, signifying the V8 engine and 12-volt electrical systems, while 6-cylinder models retained the 6-volt systems used in 1953–54.Although not a part of the original Corvette project, Zora Arkus-Duntov was responsible for the addition of the V8 engine and three-speed manual transmission. Duntov improved the car's marketing and image and helped the car compete with the new V8—engined Ford Thunderbird, Studebaker Speedster and the larger Chrysler C-300, and turned the Corvette from its lackluster performance into a credible performer. In 1956 he became the director of high-performance vehicle design and development for Chevrolet helping him earn the nickname "Father of the Corvette."
Although the C1 Corvette chassis and suspension design were derived from Chevrolet's full-size cars, the same basic design was continued through the 1962 model even after the full-size cars were completely redesigned for the 1955 model year. This was due to the combined factors of the relatively high reengineering and retooling costs for this low-volume production vehicle, the continued potential for cancellation of the car, and the increased size and weight of the all-new suspension design for the full-size cars, which made it unsuitable for use in the lighter weight Corvette.