Showing posts with label Dante Giacosa. Show all posts
Showing posts with label Dante Giacosa. Show all posts

Sunday, December 26, 2010

Fiat 500 makes "10 reliable cars that refuse to die" list


MSN posted an article on 10 cars that refuse to die. Number six on the list is the Fiat 500, made from 1957-1975. Readers of this blog already know the history of this legendary car, so it's not a surprise to us.

In the article they say "...the Italian maker cranked out 3.4 million between 1957 and 1975, many of which are still plying Italy's narrow streets today. It helps that the two-cylinder car is outrageously simple -- basically, a lawnmower with a roof."


Dante Giacosa


However, this statement doesn't do the Fiat 500 justice, because, although the 500 appears to be simple, it is an engineering and design masterpiece, created by two of the most legendary automotive designers/engineers of the 20th century; Dante Giacosa and Aurelio Lampredi.

You can read more about this iconic design here.

Tuesday, February 24, 2009

Design of the Fiat Nuova 500

Let's resume our look at the Fiat Nuova 500 of 1957. In this installment, with the help of Fiat Auto Group Press, we'll look at how the design of the Fiat Nuova 500 came to be.



The 1957 Fiat Nuova 500



The 110 prototype for the Nuova 500

To understand �how� and why the Nuova 500 was born, we have to think not of a mere substitute for the old Topolino (509,650 units between 1936-1955), or of a model that was able to compete with a scooter, in terms of costs and efficiency. Fiat obviously decided to do �something� better. The strategic planning of models had begun again, after the anguish and uncertainty of the war years. Giacosa wrote an interesting description of the �preparatory� stage before the arrival of the car. The most important Italian automotive engineer in the second half of the 20th century, and the true father of the Nuova 500, is the best witness to these events. �While the 600 was still at the experimental stage,� he said, �I had put people back to work on a minimalist car, even smaller and more economical. The Italians wanted cars, and they were willing to make do with even less space, provided it was on four wheels. No matter how small, a car would still be more comfortable than a scooter, particularly in Winter and in the rain. I had people sketch models of unconventional small cars that had to compete with the Vespa in particular.�

As far back as 1939, Fiat had already done some work on �minimalist� cars that had remained at the experimental stage because of the war, which is what happened to �the first type 100 with front-wheel drive and a 500 cc transverse engine, designed in 1947� which was never built. During the war, a prototype, known as the Gregoire, appeared in France attracting a great deal of attention, but again, nothing came of it. But at Mirafiori, the engineers knew that in Germany they were designing small cars like the BMW Isetta, which Giacosa called �half-way between a car and a motorcycle�, and attempts were being made to restart manufacture of the people�s car, the Volkswagen, in viable numbers.

The Deutsche Fiat company had a sort of technological antenna in Germany through its headquarters in Heilbronn and its assembly plant in Weinsberg. A technician called Hans Peter Bauhof worked there, whom Dante Giacosa defined as a man with a �fervid imagination, animated by a restless spirit of initiative�, adding, in what resembled a note to the personnel department, that he was �shy and modest, but ingenious, tenacious and hard-working�.

In 1953, the technician from Heilbronn submitted his proposal (which appears somewhat rustic from the pictures that still remain) for a small car with a single cylinder, 2-stroke engine derived from a motorcycle which, in Giacosa�s words, was �unsuitable for the car that Fiat wanted to build". But Bauhof�s �ideas for the construction of the bodywork� were appreciated in Turin. Bauhof also sent a prototype to Turin, which Giacosa found �interesting for its simplicity�, but the rest of the company considered it �too superficial and insufficient as a car�.


When Bauhof�s proposal to use a motorcycle engine had been discarded, Giacosa continued to work on the 500 project, with the goal of �reduced weight, wheels, suspension and steering�. Using his common sense, half-way between starting from scratch and borrowing something from the 600 which was at an advanced stage of development, in 1954 the engineer decided �that the engine had to be a 4-stroke, with two cylinders in line, which is the simplest, most economical engine, and that it should be air-cooled. It may be positioned transversely, it is simple and has a high mechanical efficiency�. He entrusted the actual design to the engineer Giovanni Torrazza, �the only graduate working for me who knew how to draw� and designed the bodywork himself, because �I was so worried about giving the car an attractive shape, a structure that was as light as possible but sturdy, and simple but economical to build�. Giacosa prepared 2 plaster models, one very similar to the 600 and the other entirely new. �I tried to make the sheet metal surface as small as possible�, he wrote in his book, �in order to limit the weight and the cost, much as I had done for the 600�.


Fiat Nuova 500 Cutaway

His description of the presentation of the two mock-ups of the 500 is involuntarily comic because, as Giacosa recalled, �when I presented the two mock-ups to the Professor (Vittorio Valletta, Fiat Chairman at the time) and to the small Executive Committee, they were silent and perplexed, although they gradually relaxed when they understood the various reasons for things. And because they had to take a decision, they decided to support me, and approved the new version�. In other words, in 1954, the sketch for the bodywork of the Nuova 500 now existed, and it was similar to the car we all know and not the rehashed 600 design.

1957 Fiat Nuova 500 Brochure


The start of development

Giacosa went on to say (after all, no one is better qualified to describe the events) that �once the bodywork was approved, the new model 110 (Fiat internal number-code name for the Nuova 500 project which adopted the �hundreds-based� numbering system for the various �types� and models) was discussed for the first time at the �New types meeting� of October 18, 1954, attended by Giacosa, Vittorio Valletta (Chairman and Managing Director of Fiat), Gaudenzio Bono (also Managing Director and General Manager), Luigi Gajal de la Chenaje (Vice Chairman and Commercial Manager) and other representatives of company management. And on that occasion, the new car shed its project number and was given its first name, or number, the �400�.

At the meeting it was decided that the new model would have a power delivery of 13 bhp, a capacity of 480 cc with overhead valves or �higher with lateral valves�, a top speed of 85 km/h, fuel consumption of 4.5 litres for 100 km, a weight of 370 kg and would carry 2 passengers. �The prototype was to be approved on June 30, 1955 so that production could start in mid 1956�. At the same time, a prototype with 4 seats instead of 2 was also approved, as well as another prototype �but with a different, more luxurious body� for Autobianchi (a company created out of the former Edoardo Bianchi company, set up in 1955 with capital from Fiat, Pirelli and Bianchi). Giacosa also states that the same meeting also approved: the 600 with sunroof, the 600 TV, the 600 Multipla and small van, the 1100 with a 1200-1300 engine and three new models, the 101 - 1400, the 105 - 1900 and the 112 - 2300 cc.

The meeting in the Park at Stupinigi

Nowadays, car makers try to hide their new models, keeping them even from the eyes of employees, or they organize ultra-secret clinic tests, and Dante Giacosa�s description of the presentation of the entire new range of Fiat models, including the 500, is another curious sign of the half century that has passed. It all took place not in a secluded spot, but in the park of the Royal Hunting Lodge at Stupinigi, just outside Turin. The park is open to the public and no manufacturer would use it today to present its entire range of future models to company managers, and also to its major stockholder, since �Avvocato� Gianni Agnelli, Vice Chairman of the company, was also present at the meeting of October 18, 1955.

�The new model meeting was held in the park at Stupinigi,� and Giacosa exhibited the Fiat and Autobianchi versions of the 400 (the 500), the 600 with sunroof, the 600 estate or Multipla, the 1100, the 1400 with 1.6 litre engine, and the 1900 Gran Luce. �The Fiat and Autobianchi (later the Bianchina) prototypes of the 400 were approved�, Giacosa noted without further comments. Another �New model meeting� was held in January 1956, and it was confirmed that production of the 400 (500) would start in the Spring of 1957, followed a few months later by the Autobianchi. �Someone expressed the fear that the public might find the Autobianchi more attractive and appealing than the Fiat, and prefer it�, said Giacosa in his book, �but we decided to set a higher price, closer to the 600, in order to limit demand to no more than 50 cars/day, since Desio (the Autobianchi plant) could not exceed that figure�. At the same meeting, a manager whose name is not known, even proposed giving the 500 to Autobianchi to produce, while Fiat built the Bianchina, but luckily for Fiat the proposal never got off the ground.

Fiat Lingotto Factory in Torino


An investment of 7 billion lire was earmarked for the project, with an output of 300 cars/day. �Valletta persuaded us to turn out 500 units/day of mechanical parts and bodies, but only 300 cars/day worth of other parts that were built in the subsidiary workshops in Lingotto�. The 200 per day not assembled but manufactured and available on hand were used to build up the parts stocks, and if necessary, would be assembled to create the so-called end-of-line �store�. The months leading up to the launch were intense, with road tests, particularly to reduce vibration and engine noise, and to increase reliability and driveability. But at the beginning of the Summer of 1957, the Nuova 500 was ready for the market.

Sunday, February 15, 2009

Dante Giacosa

Before we continue with the history of the Fiat 500, let's talk about the man responsible for its design.

Dante Giacosa




Dante Giacosa became one of the most influential car engineer/designers in Automotive history. Born on January 3, 1905. He worked at Fiat from 1930 to 1970. He rose from a design engineer to Car Engineering Manager to head of the Vehicle Engineering department in 1955, and in 1966, Division Manager and Member of the Executive Committee. When he left Fiat in 1970 he remained a consultant �for life�.

In 1927, at 22 years of age, he graduated from Turin Polytechnic with a degree in Mechanical Engineering. He joined Fiat shortly after graduating and, after a period designing diesel and aircraft engines, became Car Engineering Manager in 1933.

In that year, Fiat completed research on small car design arriving at the conclusion that in order for a small car design to be successful it couldn't be a large car scaled down to smaller dimensions (think Pinto, early rwd Toyota Corrolas and Datsun 1200's etc.). It had to be a more advanced design, designed from the start, from the inside out to accommodate passengers and luggage.

Previously, the small car prototypes Fiat had made up to then were modern, conventional designs equal to other competitors, but Fiat management wanted something better. Their design specifications called for a car that would stay ahead of the competition for many years to come, it also had to have lower manufacturing costs. This would require advanced design and engineering.

The Original Fiat 500



Dante Giacosa was the man in charge of this project, the car we know as the original Fiat 500 or Topolino (the Italian name for Mickey Mouse, meaning "little mouse"). What he came up with revolutionized small car design. It had advanced packaging with major mechanical components being placed in ingenious positions to offer the most room and give the car excellent road holding, braking , directional stability and accommodations. The suspension and braking systems were modern and worthy of a car costing much more. It had outstanding fuel economy and excellent reliability. It was also economical to manufacture with around 520,000 cars being produced between 1936 and ending with the 500C of 1955.


The 1955 Fiat 500C



Another outstanding Giacosa design during his tenure was the little known (in the United States) transverse engined, front wheel drive car patented in 1947. This car was called the 100E1. This proceeded British Motor Corp Mini (1959) and offered a short stroke four cylinder OVERHEAD CAM engine compared to th Mini's primitive long stroke overhead valve engine.

This design was rejected at the moment (1947 post war Europe) because of the high costs involved in manufacturing. However, what became clear were the days of conventional front engine/rear wheel drive platforms for the smallest cars were drawing to an end. The space used for the propeller shaft and large rear axle took up too much space in a small car. The engine had to go at either end of the car and had to encompass the transmission.

Rear mounting of the power train was not automatically adopted, though. Rear engine cars of the period where known for treacherous handling in certain conditions. This was totally unacceptable to Fiat and Giacosa.

There were two major factors that played a part in the unacceptable handling. First, the suspension design favored at the time (swing axles) played a critical role in the unacceptable handling. Swing axles undergo severe camber changes near the limit of their suspension travel. This contributes to the loss of adhesion and subsequent loss of control. Giacosa's solution was to adopt a semi trailing arm suspension design. This type of suspension doesn't undergo the severe camber changes and offers more benign handling characteristics. It was more expensive to design but shows where Giacosa and Fiat placed their priorities. It is notable that it took VW and Chevrolet's Corvair many years (and deaths) to adopt a similar semi trailing arm suspension for their cars.

The other factor was the weight and size of the engine. Once the power train went over a certain weight it was difficult to tame the inherent over steering characteristics. This might be entertaining in a sports car but not acceptable in a car made for normal folks with normal driving skill. Through careful engineering, careful placement of components and using light weight castings, Giacosa kept the weight down and minimized the impact the power train had when the car was loaded with passengers.

It should be noted that Fiat used rear engine placement on only their smallest of cars which naturally had the smallest (and lightest) engines. This concept looks like it will make its reappearance on the New 2010 Topolino, a car smaller than the New 500.


The 1955 Fiat 600

All this led to the birth of the 1955 Fiat 600 which replaced the Fiat 500C. Compared to the 500C it replaced it, the 600 had a four inch reduction in wheelbase but sat four adults as opposed to the two in the previous model. It was also lower by an inch and a half but five inches longer. An example of its design excellence is despite the bigger overall dimensions and being a four seater, the car weighed within eleven pounds of the two seater 500C.


The 1955-1960 Fiat 600 Multipla

This brings us to the next car Giacosa's brilliance was demonstrated, the 1957 Nouva 500. We'll go into the design specifics on another post. But briefly, mid Fifties Italy was still devastated from WWII and poor. Two seater micro cars/bubble cars were becoming popular. These typically sat 1-3 people and were arguably closer to a motorcycle than car. Giaoccosa came up with the Nouva 500. A real car people could afford and offered a real automotive experience and then some. Nearly 3.9 million were sold between 1957 and 1975.



The 1957 Nouva Fiat 500

From there, we have a string of legendary cars, each one advancing automotive design into the modern age. The evolutionary 1964 Fiat 850 series, the 1964 Autobianchi Primula ( the precursor to the modern front wheel drive car), the 1966 Fiat 124 series, with it modern designed Twin Cam belt driven engines (the type everyone uses today), the brilliant 1969 Fiat 128 series ( the car which most modern transverse engine front wheel drive cars are based off).


The Fiat 124 Sport Coupe


Before we leave, let's touch on the last car Dante Giacossa did for Fiat, the 1969 Fiat 128. It is a car that has influenced nearly every car on the road today.

Many auto enthusiast know and revere the BMC Austin 7 and Morris Mini. When these cars came out in 1959, they were the first production transverse engined front wheel drive small cars. They showed the dramatic space utilization that this layout could achieve. However, the layout of these cars had some dramatic disadvantages to them that limited the appeal to other major car makers.

The transmission was integrated into the engine sump and shared the same oil supply. This is not a desirable feature for several reasons. First the difficulty and expense of manufacturing. Second , servicing is much more difficult, Thirdly, engines and transmissions like to use oils with different characteristics. And an automatic transmission would be nearly impossible.

These cars also had a radiator fan driven by the engine with the subsequent radiator mounted in the right side fender well. This location was not ideal as it limits packaging alternatives.

Dante Giacosa wanted to separate the engine and transmission to eliminate these problems, so with the 1964 Autobianchi Primula he did. Up until then, most front wheel drive cars had to have the engine and motor removed to change a clutch. This car was the production test bed for Fiat to try out their front wheel drive concept originating with them in 1947.


The1964 Autobianchi Primula



It was a successful start.

Giacosa then designed the Fiat 128 series. This car was the first to combine the transverse mounted engine with separate trans axle, unequal length drive shafts, McPherson strut front suspension, short stroke Overhead Cam engine, front mounted radiator with an electric cooling fan. A full 80% of its space was devoted to passenger room. A popular advertisement for the Fiat 128 back then stated, "it's smaller than a VW Bug, but has more room inside than a Cadillac Eldorado".



The 1969 Fiat 128 Power Train


Giacosa demonstrated with the Fiat 128, that it was a viable power train layout suitable for economical mass production and offered clear advantages over its rivals. After seeing the success of Giacosa's design, other car manufacturers soon brought out their own copies of the 128.




The 1969 Fiat 128



At its peak, the Fiat 128 won more car design awards than any other car in history. A fitting tribute to a man that made life better for millions by providing thoughtful, often brilliant designs that could be afforded by the average person.

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References: Fiat Press, "The New Fiat Guide" by Jan P Norbye, "Will The Real Copy Cat Please Stand Up" by Karl Ludvigsen