CARS (PART 9)

7 Янв 2015 | Author: | No comments yet »
Mercedes-Benz W125

Daimler-Benz Aktiengesellschaft, Untertьrkheim,

In 1883 Karl Benz the Benz Co Rheinishe Gasmotoren in Mannheim and three years the first Benz cars seen on the roads. Gottlieb had built engines since and 1890 he and Max von Duttenhofer founded to deliver car engines to Panhard et and Peugeot. Both companies and were among the earliest in car racing. The Austrian businessman Jellinek became interested and two cars from Daimler. Jellinek became the prime of Daimler cars. When died in 1900 von Duttenhofer leading the company with the Wilhelm Maybach as technical The same year there was a when their test Wilhelm Bauer had a fatal in a race at Nice with a car by Jellinek.

The car had been too short and and Jellinek ordered a new lower, and more stable car to be constructed to his specifications. He ordered 36 cars two reservations, he wanted the sole to sell Daimler cars in countries and he wanted the cars to be after his daughter Mercйdиs. The new car its debut in 1901 and was such a design that it can be considered the modern car. Soon all built cars were Mercedes. In 1903 the factory was to Untertьrkheim where it has been That same year the first major race when the Belgian Camille won the Gordon Bennett race in But it was almost a non-event for the team as a fire had destroyed the race and new cars had to be borrowed from owners in the last moment. followed up their reputation as a to be reckoned with by winning the French GP with Christian behind the wheel, its main being a Benz driven by Hйmery.

Benz had as early as in announced that he would not cars for racing, thus a conflict between him and co-owner Ganss that ended in resigning in 1903. Ganss had a car built and raced without success. In 1904 Benz to the company. Then there was no action seen by Benz 1907.

Mercedes cars had been used for attempts on the speed record with K. Vanderbilt, Pierre de Caters and Bowden being succesful. In Benz produced the 21.5 200 bhp Blitzen Benz, the fastest man vehicle of the pre-war era. by Hйmery, Barney Oldfield and Burman it shattered the land record. In 1914 Lautenschlager proved victorious, leading the team to a triple victory in the GP in what has been called the of the century.

With the French GP closed to the factories after the war Mercedes their interest to other of racing as Indianapolis and Targa And Benz built the sensational engined streamlined Tropfen in 1923. That same Ferdinand Porsche was employed by But Porsche’s Grand Prix the first Mercedes with an 8 engine, produced a car with handling as proved by Count fatal accident at the 1924 GP.

Things were changing. On 1 1926 the integration between and Benz became a fact Daimler-Benz AG. Mercedes junior Rudolf Caracciola was turning a top driver, being the surprise of the 1926 German GP while driver Alfred Neubauer it more interesting to organize to drive and debuted as team for Mercedes at the 1926 Solitude GP.

was no interest in building GP cars in the new and the racing department had to do with cars of the S, SS and SSK type. Bad world led to that Mercedes-Benz retired racing in 1931, the factory to support Caracciola as semi-privateer a SSKL car. With car Caracciola became the first non to win the Mille Miglia, a performance only Stirling Moss has able to repeat. The next even that support had to be Caracciola moving on to Alfa with a promise to return times got better.

In 1934 returned to GP racing creating a with their streamliner independent suspension. With the of the 1936 season Mercedes-Benz GP racing for the rest of the pre-war With the factory destroyed the Second World War it was not until the 50s Mercedes could think racing again. Starting off the 300SL sports cars the was back at Formula 1 racing at the French GP, Juan Manuel taking both the 1954 and titles for the team. But after the decision was taken to retire both sports car and GP racing, a probably prompted by the infamous Le catastrophe where Pierre Mercedes 300SLR crashed the grand stand with 80+ It would take 34 years the Silver Arrows returned.

The was the prestige flagship of the newly Daimler-Benz AG company. Constructed by Porsche the car with its 375 cm wheelbase appeared in 1925. The 6 cyl 6.3L (94 x 150 mm = 6242cc), cast as one piece in an alloy with a cast top, delivered 100 bhp. the gas pedal was pressed to the bottom it engaged the 1.41 Ata supercharger a total of 140 bhp/3100 rpm. For an upgraded variant appeared and a shorter sporty variant K (Kurz) with a 340 cm wheelbase. The engine gave 160 bhp (with


Not able to build a real Prix car the factory decided to the 24/100/140K into a sports Appearing in 1927 the S (Sport) had a new body, a completely revised improved brakes, and the engine had moved 30 cm backwards to improve the distribution. The engine was enlarged to 6,7 L (98 x = 6789cc), had dual carburettors and a 1.5 Ata giving 180 bhp/3000 rpm in normal and 220 bhp in works specification with compression rates and special

In 1928 a two seater touring appeared. Called SS (Super it had a higher engine hood the S and the engine was further enlarged to 7.1 L x 150mm = 7069cc). Giving 200 bhp with a special race and a 1.69 Ata compressor it delivered up to 275 rpm in race conditions. Factory cars even used a Ata elephant blower.

A shortened for mountain climbs, the SSK (Super Kurz), appeared in 1929 a 295 cm wheelbase. The engine was improved 1929-30 to finally give 310 rpm with 1.83 Ata compressor.

149 type S, 114 type SS and 31 or 32 type SSK built. (Actually 155 + 102 + 37, but five S and SSK cars were modified to SS and one S car to SSK spec). The SSK chassis numbers 35986-35990, 36047-36056, 36083, and 36393.

As Mercedes-Benz retired racing in 1931, the factory to support their drivers as with special SSKL Sport Kurz Leicht) By using thinner steel for the and by drilling a multitude of holes in the the cars were made 120 kg lighter than ordinary

Five of the SSKs were in 1931 by the factory to type The very first SSKL was by Caracciola/Sebastian at the 1931 Mille which they won. the car Caracciola also proved in the 1931 German GP and Stuck hillclimb champion in 1932. Two of the were rebuilt as streamliners, the one von took to victory in the 1932 and the one Otto Merz had his fatal with at practicing for the 1933

Additionally to the early factory of 1931, five customer were changed in 1932 and one in 1933 and 1934 to SSK L making a of 12 (according to Tragatsch). The engines of later models were not changed to the desired 310 bhp. The W25 was a combination of traditional and revolutionary After having considered but a rear engined design followed a scheme used in type 380 passenger car.

The was of a traditional box section type, to save weight. The engine was of traditional type, a 3.4 litre with forged steel in two 4 cylinder blocks with on water jackets and with overhead camshafts. The one piece had 5 bearings. A vertical Roots was placed at the front end, at double engine speed and a pressure of 1.66 atmospheres. The pushed the air into two double carburettors, a relief valve out the surplus pressure in the air when the lifted the gas, creating the high pitched Mercedes-Benz

The aluminium gearbox was revolutionary, in unit with the rear with the ratios working The input shaft was below the shaft lowering the propeller and thus the driver seat. To be to transmit the available horsepower the wheels independent suspension was throughout with swing rear and wishbones in front. The wishbones were connected to springs carried inside a tube.

The car had a streamlined body of hand-beaten aluminium alloy in white. The Lockheed hydraulic had aluminium drums 50 mm wide a diameter of 400 mm.

Work started in 1933 and the new car was ready for testing in 1934. Von Brauchitsch had a crash at due to tyre failure and the next Henne had a crash in the second car at after having problems the differential. The new cars were at the Avusrennen but withdrawn after because of carburettor problems. they made their at the Eifelrennen. Legend says failed the 750 kg limit at the weight-in by 1 kg and during the night the white and filler was removed and replaced by a coat of aluminium color. The day the cars then passed the check and went on to win their race. However late has shown that the 1934 was run to a free formula with no limits so there is something with the story. Anyway, the reason, from that onwards the cars featured in the color that had already adopted by Auto Union.

To answer the challenge from Union the engine was replaced by the M25AB and then the M25B adding 70 bhp at a cost of 4 kg more weight. The M25 B engine was also during the 1934 speed attempt, the engine giving 430 bhp a special fuel mixture.

was a bad crash during practice for the GP where von Brauchitsch fractured his but otherwise the season was quite with four GP victories and one victory. However there things that could be for 1935. Especially the gearbox had to be difficult during downshifts. For the season four new chassis built and the old cars were The M25B engine was used the smaller M25AB supercharger the M25A engines were by the junior drivers and as spares. A new formula for the season increased the power. The new cars featured brake cooling, a redesigned user friendly gearbox and 65 mm brakes. A ZF self-locking differential and an air for the supercharger were introduced the season. Late in the season the 4.3 high torque M25C was introduced. A streamlined variant closed cockpit was used by at Avusrennen and Caracciola and Fagioli cars with small cowls in that same

1935 proved to be the best ever for Mercedes with 9 victories including a 1-2-3 at the GP and with Caracciola becoming the Champion. However, Geier one car in a serious crash at the Swiss GP.

Mercedes-Benz W125

In the W25 cars had an oil cooler added and used mainly as spares. and von Brauchitsch raced them at the GP and von Brauchitsch prefered the old car at the Eifelrennen Lang probably also the old car.

Mercedes-Benz W25 (36 or kurz) Prix 750 kg)

To face the challenge the new cars of Auto Union and Romeo the Mercedes factory to construct a new 600 bhp 5.6 litre V12 for the 1936 This D type engine known as the DAB as it had the same bore and as the AB engine. When the first was assembled during the summer of it proved to be seriously overweight kg against 185 kg for the old engine).

To fit this heavy engine the cars under the 750 kg limit considerable changes to be done to the cars to save 110 kg of weight. made the radical decision to cut off 25 cm the wheel base of their GP Other news in the car included a gearbox and a de Dion rear (It has often been said the Mercedes W125 was the car that the de Dion axle, but the 1936 was in fact the first.) The new car was in fact so that the tall von Brauchitsch not fit properly into it. The exhaust was also new with the pipe lower to the ground. Somehow the managed to squeeze the engine in the weight limit only to that the weight distribution was that the car was totally undriveable.

a 4.7 litre 450 bhp variant of the straight 8 known as the ME25 had to be built in a and put into the new cars. But that was to too much of the old engine block. the season the cars suffered numerous engine failures. The car had bad road holding, it was oversteering and the wheel gave a heavy to the drivers. The chassis wasn’t enough for the suspension to work in a way. To cure the problems held an extensive test at Nьrburgring in August 1936 48 chassis changes. After a new at the Swiss GP the Mercedes-Benz team from racing to reorganize for 1937.

The car and the DAB engine were developed into streamlined breakers where the cars in curves was a minor consideration.

The W125 was the ultimate pre war Grand car with the stongest engine in Grand Prix racing the turbo era in the 1980s.

Work in August 1936 under of Wagner using ideas by Uhlenhaut during testing of the The frame was of an oval tube with 5 crossmembers strenghtening the considerably. The wheelbase was increased to 280 cm.

The de Dion rear axle was but mounted the other way with the connected to a slot in the gearbox sideways rigidity with movability. The springs were by torsion bars. The front was entirely new with long and an open vertical coil offering greater movement to the The friction dampers were by hydraulic dampers. The new engine, the F series or the M125, was similar to the straight eights but with a new block to accomodate the larger Bearings were later from 5 to 9. With a weight of 223 kg the new 5.6 engine was only 20 kg heavier the original 3.4 litre A type. The old was replaced by a constant mesh transverse gearbox. The Lockheed brakes now had double shoes and drums with a diameter of 400 mm and a of 72 mm. A 240 litre fuel tank in the made it possible to run a Grand on a one stop strategy.

The prototype was tested in February 1937 a ME25 engine. At the Eifelrennen the carburation system was replaced by a carburation system on Kautz’ It was used again at the Vanderbilt cup on car with so good results the new system was adopted to all cars at the race. The new construction with the compressing the air/fuel mixture in from the carburettors increased the power with as much as 30 % at low and 11% at full speed. It also the typical Mercedes engine

By June 1937 the car had become 8 kg and had to be slimmed down. Chassis was reduced and lighter constructions adopted for dampers, brakes and

With 6 victories, 9 second and 5 third places the W125 the 1937 season bringing a new for Caracciola.

CHASSIS LOG W 125:

Mercedes-Benz W125
Mercedes-Benz W125
Mercedes-Benz W125
Mercedes-Benz W125
Mercedes-Benz W125

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