FIELD: transport.
SUBSTANCE: icebreaker fore end, including hull fore end lines of optimal shape, contains board rotary units for creation of wells in thick ice as icebreaker is moving. Each of rotary units is made as changeable hollow cylinder with cutting elements in the form of diamond teeth on lower part - coring bit with changeable coaxial auger bit inside it. Coring and auger bits have independent drives of axial rotation around vertical axis with reversing and device for bit feeding into wells.
EFFECT: higher icebreaker capability to go through Arctic thick ice fields.
2 dwg
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