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Mercedes

1933: Präsentation des Sattelschleppers LZ 4000, 6000 und 8000

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On the automobile and motorcycle exhibition in 1933, Daimler-Benz presented for the first time, the new trailer-Generation type of LZ 4000, LZ 6000 and LZ 8000, which were in three payload classes four, six and eight tons available. The time of presentation was extremely effective, to the abrupt incipient economic boom.

5,000 kg payload, exclusively Diesel-drive

Already in the mid-30s, Daimler-Benz Trucks with gasoline engines built mainly only for Export, with the range starting at 5,000 kilograms of payload in the Truck area from the year 1934, belonged exclusively to the Diesel.

In their descent, and motorization, the new Mercedes-Benz semi-trailer, however, differ greatly from those bad Boys, care for otherwise to compete for payloads of higher caliber. It brings, for example, with heavy iron-tipped classic motor L 5000 car from the year 1934 with its 10,3 Liter and 120-HP six-cylinder to five tons of payload at 5800 kilograms, the chassis weight, the tractor LZ 6000 is designed for at least 6000 kg payload at just over 2700 kg weight of the chassis.

Relatively small volume, but high-speed Diesel (rated to make, for the first time at 2000 Rpm), as well as a sleek tractor concept, it is possible. Directly from the light Truck Lo 2000 of 1932 and the resulting heavier variants of the engines. And for the first time worldwide as standard with a diesel engine mounted on a light Truck is also due to the chassis concept. Lo 2000, Lo 3000 and Lo 3500 have developed the designers to tractors in the saddle LZ 4000, LZ 6000 and LZ 8000 more.

Standard engine with 3.8 Liter displacement and 55 HP

The Lo 2000 well-known, and now in the LZ 4000 is used in base engine with 3.8 liters of displacement and four-cylinder making 55 HP and can claim to have the car diesel on a broad Front in the first place led to a breakthrough. The slightly stronger, enlarged version of this four cylinder draws 65 HP from 4.9 liters of displacement, has proven itself in the Lo 3000, and drives the tractor LZ 6000. The six-cylinder variant of the world’s first high-speed vehicle diesel engine has a 7.4-Liter displacement, gives this 95 horsepower, and only the most serious representative of the new saddle is reserved for the tractor series: the LZ 8000 with eight tons of payload and a gross vehicle weight of 14 tons.

Him as well as his two smaller brothers the factory, and with good reason equips with eight-stage Gears: Four gears, as in the Lo range common – would be for the gross train weights of eight, eleven and fourteen tons certainly not sufficient. And the fact that the eight gears are still certain restrictions apply, which describes a contemporary brochure as follows: “In General, a saddle should be used the tractor only for routes that lead through the predominantly flat terrain. The occurring gradients must not be more than 7 percent.“

The advantages of the semi-trailer truck is a result at the time (and still do today) from the decoupling of the tractor and the carrier. Possible that a particularly favorable ratio of Zugleergewicht and payload, was characterized. On the other hand, the distribution of the load allowed on three axes, the foray into the payload areas that appeared until then to be impossible. The great hour of the three-axle vehicle has not been beaten yet, and two-axle motor will be limited wagon 1933 by law to a maximum total weight of just over eleven tons.

Anyway, the truck comes to tax law effective. The authorities but from the trailer (unloaded) is only the weight for the calculation of the tax to the calculus, which rests on the axles of the towing vehicle. What has put the third axis of the empty train, and falls easily under the table. On top of that, the tractor-trailer allows for the waiving of staff, without which it is not in some drawbar trailer combinations: “As a special preference is still noteworthy“the advertising from that time, in a slightly laconic diction,” the operation of the semi-trailer is carried out by the driver alone, so a one-man operation.“ In addition, the truck offers compared to the usual drawbar trailer combinations, the advantage of a far higher degree of flexibility. Removable bridges are at the time, after all, no topic: so Who has designed its transportation services as a Shuttle operation, or of different constructions to serve, can not get around the truck and trailer: Only, he makes it possible to switch between different design concepts or the load carrier to Be loaded or Unloaded simply turn off, and during this time, the towing vehicle continues to productive use – if necessary, also in passenger transport.

Because of popularity of the procedure, to castle with the tractor between freight and passenger transport. During the economic boom in the 30s, the population has won a mobility that no longer can satisfy the manufacturer of mass transport. Into the breach Tatzelwürmer” referred to, as a huge jump, “large-capacity buses, designed saddle trains. The largest of its kind reached the impressive length of 18.7 meters, and can carry, including the standing places at least 170 passengers.

A further variant for ten tons of payload

In the course of time, an additional embodiment which is to be regarded as a consistent further development of higher payload joins the three-strong basic program of 1933. For a total of ten tons of payload, the new saddle is designed to tractor LZ 10 000, the Daimler-Benz at the Berlin motor show in 1938 shows: Ten tons of payload he is doing at just 17 tonnes gross train weight and with a chassis weight of tractor of well-3800 kg possible. Under the hood, the sleek six-cylinder from the Lo 3500, the it brings, in the meantime, but at 100 HP and with ten millimeters more stroke, but five millimeters less in bore on a 7.3 Liter engine comes is still.

Abrupt end and late Renaissance

The promising concept may hold for now, but only briefly. Because in the so-called Schell programme, with the Nazi government wanted to turn the vehicle the same is not provided for the production of tractors. And shortly after the war, the saddle looks on tractor not with a direct prohibition, which had pronounced the allies.

In Germany, the truck and trailer will dominate now for decades. Since the 90s, but, as the trailer gets to 13.6 metres in length, given to a competitive load length can provide, brings the trailer to the truck unstoppable. Today, he has a hell of a drawbar trailer combinations practically to insignificance. The same advantages, with which the LZ-series before the 70 years, make the truck and trailer today in the international long-distance traffic is already to the Standard: high flexibility, easy exchangeability, and particularly favorable payload conditions.

Source: Daimler AG

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