The '''Type Es 3750''' or simply the '''Es 3750''' is a series of bucket chain excavators built by TAKRAF and used in Germany. According to TAKRAF, they boast that the Type Es 3750 is the largest bucket chain excavators in the world.<ref name="TAKRAF">{{cite web|url=https://www.takraf.com/product/bucket-chain-excavators/#bucket-chain-excavator-ers-500-in-bulgaria|title=Bucket-Chain Excavators |website=TAKRAF}}</ref><ref>{{cite web|url=https://www.environmental-expert.com/products/tenova-bucket-chain-excavators-703970|title=Tenova - Bucket-Chain Excavators|website=Export Environmental}}</ref> Type Es 3750s are notable for being always used in conjunction with the Overburden Conveyor Bridge F60, another absurdly large land vehicle.<ref name="f60">{{cite web|url=https://www.f60.de/en/the-bridge/details.html|title=F60 - The bridge in detail|website=F60}}</ref>
==Specifications== The Type Es 3750 are incredibly immense digging vessels,<ref name="osti.gov"/> the largest of its kind according to TAKRAF. Each Type Es 3750 has the total length of {{convert|137|m|ft|0|abbr=on}}, a height of {{convert|40.5|m|ft|0|abbr=on}} and a weight of {{convert|5,118 |tonne|lb|abbr=on|sigfig=3}}.<ref name="leag">{{cite web|url=https://www.leag.de/fileadmin/user_upload/materialverkaeufe/Materialverkaeufe_engl/V19_044_09_bucked_chain_slewing_excavator_Es3750__1292.pdf|title=bucket chain slewing excavator Es3750 / 1292|website=Leag}}</ref> The cutting height of the BCE's chain boom is {{convert|34|m|ft|0|abbr=on}} to {{convert|35.5|m|ft|0|abbr=on}}, whilst its cutting depth is {{convert|31|m|ft|0|abbr=on}} to {{convert|31.2|m|ft|0|abbr=on}}.<ref name="TAKRAF"/> In total, the chain boom is capable of excavating a maximum capacity of 14,500 m<sup>3</sup>/h.<ref name="TAKRAF"/> The buckets itself is reinforced by 5 to 10 mm steel plates to prevent deformation and wear-and-tear.<ref name="osti.gov">{{cite web|url=https://www.osti.gov/etdeweb/biblio/6671487|title=Optimization of digging vessel design at bucket chain excavators |website=ETDE Web}}</ref>
A unique design choice for the Type Es 3750 is the presence of two excavator's control cockpit, each spraying outwards on the left and right side of the machine. Given that it predominantly moves side-to-side with the F60, this is to be expected.<ref name="WELTDocumentary">{{cite web|url=https://www.youtube.com/watch?v=Eoy6PjCyWDM|title=The Biggest Mobile Work Machine In The World - Full Documentary|website=YouTube|date=14 February 2020}}</ref> Likewise, it also possess a small complement of men of around 2–5.<ref name=WELTDocumentary/> Another unique feature is that the Type Es 3750 runs on rails. Since it is largely grouped closely with the F60, the Type Es 3750 share the same gauge as the F60 - {{convert|1,435|mm|inch|0|abbr=on|order=flip}}.<ref name="f60"/> Likewise, the vehicles share their power source with the F60 and the nearby external coal power plant and therefore, moves the same speed as the F60.<ref name=WELTDocumentary/>
==Operations== The Type Es 3750 was built in almost exactly the same time as the F60s during 1978 in East Germany.<ref name="leag"/> Each F60 were to be expected to be accompanied by two Type Es 3750 to assist the machine in transferring overburden and lignite coal. One Type Es 3750 is purposed to excavate the topside whilst another is used to excavate the depths.<ref name=WELTDocumentary/> Excavated materials would be transported on side conveyors towards the F60 for the materials to be properly redistributed.<ref name=WELTDocumentary/> As there were originally five F60s, a total of 10 Type Es 3750 BCEs were built, but with the retirement of one of the F60s in Lichterfeld-Schacksdorf, only 8 remain in service.<ref name="f60"/>
==Gallery== <gallery mode=packed> Rychwałdska jama 2015 03.JPG Afb 27 F34 2016-02-25.jpg F60 in Betrieb.jpg </gallery>
==References== <references/>
Category:Engineering vehicles Category:Mining equipment Category:Surface mining Category:Surface mines in Germany Category:Takraf GmbH Category:Excavators Category:Dredgers