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1937 Mercedes-Benz W125

For the 1937 season, Mercedes-Benz developed a new racing car, the Westward 125. Information technology was one of the fastest & almost powerful grand prix cars manufactured. It reached the tremendous speed of 193 mph on the SPA circuit. The results list for the 1937 season testify to the nearly total dominance of the W 125: Victories in the G Prix in Tripoli and the Avus Race, double victories in the Grands Prix in Germany, Italy and Brinn, triple victories in the Grands Prix in Monaco and Switzerland.

The W125 served as a replacement to the highly sucessfull W25 and the concluding Mercedes-Benz to comply with 750 kg formula regulations. Pattern elements were largely afflicted past the formula race regulations at the time. During the years of 1934, 35, 36 & 37 in that location were no rules governing the size and aspiration of engines. This allowed for cars of extreme power and speed to race during that era. In 1937 the only main limit imposed on the teams was a maximum weight of 850kgs. This was rasied from the 750kgs imposed in the previous 1936 season.

The W125 backbone consisted of an extremely sturdy, tubular oval frame made from special steel, with 4 cantankerous members. It benefited from tests with production automobile frames equally, for instance, the one used on the 1938 generation of the Mercedes-Benz 230. The wheels were located differently, by double wishbones and curl springs at the front, as on the celebrated, noble 500 Chiliad and 540 K models, and by a double-joint De Dion rear axle which ensured abiding camber, plus longitudinally installed torsion bar springs and lever-type shock absorbers. Lateral links transferred thrust and brake moments to the chassis.

After extensive tests on the Nürburgring, the engineer Rudolf Uhlenhaut came up with a revolutionary suspension configuration: setting a precedent for after Thou Prix car designers, Uhlenhaut just reversed the basic suspension set-upwardly used until and so, stiff springing merely little damping: the W 125 had soft springs with long spring travel and potent dampers and thus served as a role model for all modern Mercedes-Benz sports cars. Its outer appearance resembled its predecessor's, unmistakable all the aforementioned past the iii cooling air inlets. For the ultra-fast Avus race on 30 May 1937 (Hermann Lang accomplished an average speed of 261.7 km/h), it was kitted out with a streamlined body. The transmission and differential formed an integrated unit of measurement. The car'south eight-cylinder in-line engine represented the highest evolutionary stage of the Grand Prix motorcar used since 1934. The supercharger was positioned behind the carburettors and thus supplied with the mixture itself – a get-go with Mercedes-Benz racing cars.

Although the West 125 served its fast purpose for 1 yr merely, it did so with keen variability. It could precisely be adjusted to the respective racetrack by means of unlike transmissions, tank volumes and petrol cocktails, carburettors, superchargers, rim and tire sizes, tire treads and fifty-fifty outside dimensions. Engine power, torque, top speed and the speeds achieved in the individual gears varied accordingly. As many as eight different transmission ratios were available, for instance, plus two rear-bicycle sizes (7.00-19 and vii.00-22). An output of 592 hp (435 kW) at 5800 rpm quoted by the factory refers to the Gran Premio d'Italy in Livorno on 12 September 1937. The engine, which had arrived at a chapters of 5660 cc in the meantime, devoured 1 litre per kilometre, an aggressive special mixture fabricated up of 88 percent methanol, 8.8 percent acetone and traces of other substances. Set up to race, the Westward 125 weighed 1097 kilograms (1021 kilograms without driver) in that configuration, including 240 litres of petrol, vii litres of water, nine litres of engine oil and three.5 litres of manual oil. The Untertürkheim engineers evoked up to 646 hp (475 kW) from the 222-kilogram engine on the test bench, corresponding to a massive power-to-swept-volume ratio of 114 hp (84 kW) and an equally astounding ability-to-weight ratio of 1.16 kilograms per horsepower. Those were values that were surpassed only decades afterwards, just like Hermann Lang'south average speed of 261.vii km/h in that year'due south Avus race.

W125 Victories:
Jul25/37 High german GP-N?rburgring, Rudolf Caracciola
Aug08/37 Monaco GP-Monte Carlo, 1000. v. Brauchitsch
Aug22/37 Swiss GP-Bremgarten, Rudolf Caracciola
Sep12/37 Italian GP-Livorno, Rudolf Caracciola
Sep26/37 Masaryk GP-Brno, Rudolf Caracciola

Pictures & Galleries

Specs & Operation

submitted by	Richard Owen
engine	G 125 F V8
position	Front Longitudinal
aspiration	Supercharged
valvetrain	DOHC 4 Valves / Cyl
displacement	5660 cc / 345.4 in³
bore	94 mm / 3.seven in
stroke	102 mm / 4.02 in
power	441.5 kw / 592 bhp @ 5800 rpm
specific output	104.59 bhp per litre
bhp/weight	710.68 bhp per tonne
redline	6000
trunk / frame	Aluminum over Oval Tube Frame
driven wheels	RWD
front tires	5.25×17
rear tires	7.00×19
front end brakes	Lockheed Hydrualic Drums
rear brakes	Lockheed Hydrualic Drums
steering	Worm & Nut
f suspension	Unequal Wishbones w/Coil Springs, Hydrualic Shock Absorbers
r intermission	De Dion Axle due west/Torsion Bar Springs, Hydrualic Shock Absorbers
curb weight	833 kg / 1836 lbs
wheelbase	2798 mm / 110.2 in
front rails	1473 mm / 58.0 in
rear rails	1412 mm / 55.6 in
length	4200 mm / 165.iv in
width	1750 mm / 68.9 in
peak	1200 mm / 47.2 in
transmission	4-Speed Manual
gear ratios	2.xiii:1, 1.37:one, i.18:1, 0.94:1
final bulldoze	3.52:one
tiptop speed	~321.9 kph / 200.0 mph

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Source: https://www.supercars.net/blog/1937-mercedes-benz-w125/

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