Production boom

Production of the Type 1 grew dramatically over the years, with the one-millionth car coming off the assembly line by 1954. The Beetle had superior performance in its category with a top speed of 115km/h (72mph) and 0-100km/h (0-60mph) in 27.5 seconds on 31mpg for the standard 25kW (34hp) engine. This was far superior to the Renault 4CV and Morris Minor and even competitive with more modern small cars like the Mini. The engine fired up immediately without a choke and could only be heard in the car when idling. It had excellent road-handling for a small car. It was economical to maintain and, for many, a joy to drive. However, the opinion of some in the United States was not as flattering. Henry Ford II once described the car as 'A little shit box' out of frustration that it was the top-selling foreign car in the US market.

During the 1960s and early 1970s, innovative advertising campaigns and a glowing reputation for reliability and sturdiness helped production figures to surpass the levels of the previous record holder, the Ford Model T, when Beetle No. 15,007,034 was produced on February 17, 1972. By 1973 total production was over 16 million, and by June 23, 1992 there had been over 21 million produced.

The military Beetle

Prototypes of the Kdf-Wagen appeared from 1935 onwards — the first prototypes were produced by Daimler-Benz in Stuttgart, Germany. The car already had its distinctive round shape and its air-cooled, flat-four, rear-mounted engine. However, the factory had only produced a handful of cars by the time war started in 1939. Consequently, the first volume-produced versions of the car's chassis were military vehicles, the Jeep-like Kübelwagen Typ 82 (approx. 52,000 built) and the amphibious Schwimmwagen Typ 166 (approx. 14,000 built).

The car was designed to be as simple as possible mechanically, so that there was less to go wrong; the aircooled 985 cc 25 hp (19 kW) motors proved especially effective in actions of the German Afrika Korps in North Africa's desert heat. This was due to the built-in fan-cooling and the superior performance of the flat-four engine configuration. The innovative suspension design used compact torsion beams instead of coil or leaf springs.
A handful of civilian-specific Beetles were produced, primarily for the Nazi elite, in the years 1940–1945, but production figures were small. In response to gasoline shortages, a few wartime "Holzbrenner" Beetles were fueled by wood pyrolysis gas producers under the hood. In addition to the Kübelwagen, Schwimmwagen, and a handful of others, the factory managed another wartime vehicle:
the Kommandeurwagen; a Beetle body mounted on the 4WD Kübelwagen chassis. A total of 669 Kommandeurwagens were produced until 1945, when all production was halted due to heavy damage sustained in Allied air raids on the factory. Much of the essential equipment had already been moved to underground bunkers for protection, allowing production to resume quickly once hostilities had ended.

Engine cooling - Basic principles

Most internal combustion engines are "air-cooled" or "liquid-cooled". Each principle has advantages and disadvantages, and particular applications may favor one over the other. For example, most cars and trucks use liquid-cooled engines, while most small airplane engines are air-cooled.
Most liquid-cooled engines use a mixture of water and other chemicals such as antifreeze and rust inhibitors. Some use no water at all, instead using a liquid with different properties, such as propylene glycol or the combination of propylene glycol and ethylene glycol. Although the term "liquid-cooled" is used here, most air-cooled engines also use some liquid oil cooling, and most liquid-cooled engines subsequently cool the hot liquid with air.
Conductive heat transfer is proportional to the temperature difference between materials. If an engine metal is at 300°C and the air is at 0°C, then there is a 300°C temperature difference for cooling. An air-cooled engine uses all of this difference.
In contrast, a liquid-cooled engine might dump heat from the engine to a liquid, heating the liquid to 150°C which is then cooled with 0°C air. Thus, in each step, the liquid-cooled engine has half the temperature difference and so may need as much as twice the cooling area.

The Kdf-Wagen

The Kdf-Wagen was a project of the Kraft durch Freude organisation in Nazi Germany.
Kdf stands for Kraft durch Freude, or "Strength through joy".
For the construction of the Kdf-Wagen, a new town now known as Wolfsburg was created in Lower Saxony.
The Kdf-Wagen had initially been called the Porsche 60 by Ferdinand, but it was officially named the Kdf-wagen when the project was launched. Later simple known as the Type 1, it became more commonly known as the Beetle after the Second World War.
In the period of the Second World War, two notable variants of the Kdf-Wagen were produced for military use: the Kübelwagen and the Schwimmwagen. A number of short-run and innovative (although ultimatly doomed) variants known as "Holzbrenner"s also existed, including charcoal and woodburning versions, intended to cope with the extreme fuel shortage experienced throughout Germany (the world) during WWII.
The designer of the Kdf-Wagen (Ferdinand Porsche senior) is often confused with his son Ferdinand "Ferry" Porsche. Ferdinand Porsche (senior) was the founder of the Porsche car company, which his son worked for and later went on to run after his death.

Development of a "Volks-Wagen"

In 1933 Hitler met with Ferdinand Porsche to discuss the development of a "Volks-Wagen" ("People's Car"), a basic vehicle that should be capable of transporting two adults and three children at a speed of 100 km/h (62 mph), and which should cost no more than 990 Reichsmark (at an average income of 32RM/week).
Ferdinand Porsche formulated the original parameters of the Beetle several years before it was commissioned. However its production only became financially viable when it was backed by the Third Reich.
Erwin Komenda, Porsche's chief designer, was responsible for the design and styling of the car.
The Type 1's mechanics and chassis were shared with several German military vehicles of the period, including the Kübelwagen ("bucket car", later adapted for civil use as the Type 181 or "Thing"), used by both the German military and the SS, and the amphibious Schwimmwagen, built in small numbers
Ferdinand's career continued on to designing the Porsche.

"The People's Car"

Literally, the word "volkswagen" means "people's car." In Germany, the idea of a people's car wasn't exactly a new one. Before the 1930's, there had been many efforts to create simple cars that everyone could afford, but none met with profound success. Almost all cars before 1930, even if they were designed to be simple enough for the average person, ended up costing more than the average worker's yearly wage.
Meanwhile, the year is 1930, and Ferdinand Porsche had just set up an automotive design company, which became known as the Porsche Büro. The company patented a sophisticated independent front suspension system, which consisted of transversely mounted torsion bars connected to two trailing arms on each side. At the time, this was lighter than most other common types of suspension. In 1931, a German motorcycle company, Zündapp, asked Porsche if he could design a suitable car for them. Porsche came up with a streamlined 2 door sedan, which had lines similar to the Beetle. It was designated the Type 12. Zündapp wanted to put in a 1.2 liter radial engine from one of their motorcycles...this was the end of the line for this design, as it didn't make it any further.
Porsche then designed a car for NSU in 1933 that was known as the Type 32. This car looked even more similar to the upcoming KdF Wagen than the Type 12 did. This car looked similar to the Tatra V570, and shared many mechanical similarities. After World War II, the Volkswagen company paid Tatra for compensation, since Tatra believed its technology and design was pirated in development of the KdF Wagen. Eventaully, NSU dropped the Type 32 project.

Volkswagen Beetle

The Volkswagen Type 1, more frequently known as the Beetle, Fusca, Coccinelle, Vocho, Bug, Volky or Käfer (German), is an economy car produced by the German automaker Volkswagen from 1938 until 2003. Although the names "Beetle" and "Bug" were quickly adopted by the public, it was not until August of 1967 that VW themselves began using the name Beetle in marketing materials.