Type SRs 8000 bucket-wheel excavator

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Type SRs 8000 bucket-wheel excavator
Bagger 293 is the largest of the Type SRs 8000s
Class overview
NameType SRs 8000
BuildersTAKRAF and ThyssenKrupp
Operators
Cost€92.46 million (2007) or US$100 million (2007) for Bagger 293 and 288[1]
In service1958-1995
Completed6
Active6
Laid up6
General characteristics
Class and typeType SRs 8000-series Bucket-wheel excavator
Tonnage7,800 t (17,200,000 lb)[2][3] to 14,200 t (31,300,000 lb)
Length220 m (721 ft) to 225 m (738.2 ft)
Beam46 m (151 ft)
Height73 m (239.5 ft)[2][3] to 96 m (314.9 ft)
Installed power
  • 1 x 6,413 kW (8,600 hp) powered electric motor[5]
  • 1 x 10.15 MW (13,611 hp) external coal power plant[4]
  • Total: 16.56 MW (22,207 hp)
Propulsion12 x caterpillar tracks
Speed2 to 10 m (6.6 to 32.8 ft) per minute (0.1 to 0.6 km/h)
CapacityBlade capacity: 21 m (69.9 ft) in diameter, 18 buckets each holding 19.6 cubic yards (15.0 m3) or 16.5 short tons (15.0 t)
Complement5[4]

The Type SRs 8000 or less commonly known as the SRs 8000-class,[6] is a family of bucket-wheel excavators known for being one of the largest terrestrial vehicles ever made by man, with Bagger 293 its - "lead vessel" - being the largest ground vehicle in history.[7] The Type SRs 8000 classification was coined by TAKRAF to describe specifically, Bagger 293, although it is unclear if this extends to its other "sibling vehicles" within the same bulk.[8]

Whilst the "Bagger" family may indicate a copy/series of the same vehicle type, it is more of a loose denominator to group any BWEs of similar bulk, length, height and size within the Hambach surface mine.[9][10] Indeed, some of the Baggers created aren't of the same size, construction period or even in the same built manufacturer. Bagger 293 and 288 for example, was constructed by TAKRAF and Krupp respectively.[11][12][13]

Specifications[edit]

As aforementioned, the one factor that unites all of them are their size. All members of the Type SRs 8000 weigh at the bare minimum of over 7,000 tons. The smallest and oldest of the family, Bagger 281 (built in 1958[2][3]) weigh over 7,800 tons, although the average weight range is around 13,000 tons.[10] Likewise, all members reach lengths of over 200 meters and require a small crew of five.[14][8] Such a size would mean that these vehicles would have its own on-board toiletry and kitchenette rooms.[15]

As BWEs, the Type SRs 8000s are all externally powered by a nearby coal production plant with an internal 6,413 kW (8,600 hp) powered electric motor to keep the machine operating smoothly. On average, all Baggers require a total output 16.56 MW (22,207 hp) of power to function with all-systems running.[4][16] Their primary goal as BWEs, is in excavating lignite coal in Germany for processing to be turned into energy or 240,000 cubic metres of overburden daily.[17][18]

Currently, all Type SRs 8000s are in-service. They are Bagger 281 (1958), Bagger 285 (1975), Bagger 287 (1976), Bagger 288 (1978), Bagger 291 (1993) and Bagger 293 (1995).[9]

Gallery[edit]

  • Bagger 281
    Bagger 281
  • Bagger 285
    Bagger 285
  • Bagger 287
    Bagger 287
  • Bagger 288
    Bagger 288
  • Bagger 291
    Bagger 291

See also[edit]

References[edit]

  1. ^ Malone, Robert (12 March 2007). "The World's Biggest Land Vehicle". Forbes. Retrieved 5 January 2017.
  2. ^ a b c "Category:Bagger 281". Wikimedia Commons.
  3. ^ a b c Die grössten Bagger der Welt (The biggest excavators in the world) (in German)
  4. ^ a b c "Bucket Wheel Excavator (Bagger 293)". YouTube.
  5. ^ "Bagger 293: Unearthly Giant of the Mining World". Rico Europe.
  6. ^ "January 1956: The bucket wheel behemoth".
  7. ^ "13,500 tons". Archived from the original on 2016-08-05. Retrieved 2014-01-20.
  8. ^ a b "Bucket-Wheel Excavators".
  9. ^ a b "The Bagger 288 The Largest Land Vehicle".
  10. ^ a b "Bucket-wheel excavator "Bagger 285"".
  11. ^ "The world's largest diggers: in pictures". 6 April 2011 – via www.telegraph.co.uk.
  12. ^ Chen, Brian X. (5 October 2009). "Monstrous Mechanical Marvels: 9 Enormous Gadgets" – via www.wired.com.
  13. ^ Gramme, Helmo; Benoit Michel (2014). "Cours Extreme Engineering" (PDF). HELMo — Haute École Libre Mosane. p. 7.
  14. ^ "Garzweiler: Bagger 288".
  15. ^ "Bagger 288 – The World's Largest Excavator". Oddity Central. 2023.
  16. ^ "Bagger 293: Unearthly Giant of the Mining World". Rico Europe.
  17. ^ Giampietro, Mario; Kōzō Mayumi (31 October 2009). The Biofuel Delusion: The Fallacy of Large-Scale Agro-Biofuel Production. Earthscan. p. 134. ISBN 978-1-84407-681-9. Retrieved 10 April 2012.
  18. ^ "Bagger 288 – a giant among bucket wheel excavators". thyssenkrupp Industrial Solutions product information page. thyssenkrupp Industrial Solutions AG. 2018. Archived from the original on 2019-01-27. Retrieved 27 January 2019.
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