Английская Википедия:BMW 3/20

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Шаблон:Infobox automobile The BMW 3/20 PS was the first BMW automobile designed entirely by BMW. It was manufactured from 1932 to 1934, replacing the 3/15 model that was initially an Austin 7 manufactured under licence from the Austin Motor Company.

Файл:BMW AM4 03.jpg
BMW 3/20 AM 4 engine

The engine used in the 3/20 was based on the Austin Seven engine used in the 3/15, but its crankshaft ran in plain bearings instead of roller bearings and had an Шаблон:Convert stroke, generating a displacement of Шаблон:Convert.[1] The new engine design also had a water pump and an overhead valve cylinder head. These design changes caused the engine to generate 20 hp, but did not change the taxable horsepower rating of 3 PS, thus giving the model designation 3/20.[2]

The 3/20 was larger than the 3/15, with an Шаблон:Convert wheelbase and a body Шаблон:Convert lower than the 3/15.[2] The 3/20 used a backbone frame unrelated to the 3/15's Austin Seven "A" frame.[3][4] It inherited the 3/15 DA-4's independent front suspension and added a swing axle independent rear suspension, using a transverse leaf spring similar to that used at the front.[1][4] The standard bodies for the car were built by Daimler-Benz in Sindelfingen.[1][4]

Journalist and engineer Josef Ganz, who had criticized the 3/15 DA-4's suspension system in the magazine Motor-Kritik,[5] was contracted in July 1931 as a consultant in the design of the 3/20 AM-1.Шаблон:Citation needed

Four versions of the 3/20 were built: AM 1, AM 2, AM 3 and AM 4, where AM denoted Automobil München.[1]

References

Citations

Шаблон:Reflist

Sources

Шаблон:BMW pre war


Шаблон:Vintage-auto-stub

  1. 1,0 1,1 1,2 1,3 Norbye, p.30
  2. 2,0 2,1 Unixnerd: BMW's Early History
  3. Noakes, p.24
  4. 4,0 4,1 4,2 Robson, p.36
  5. Article ‘Die Schwingachse des Kleinen,’ Motor-Kritik magazine, issue 3, early February 1931