TOWED DEVICE FOR ICE BREAKING AT MAKING CLEAR-WAY IN ICE Russian patent published in 2014 - IPC B63B35/12 B63B35/08 B63B1/10 B63B1/12 

FIELD: transport.

SUBSTANCE: towed device has hull consisting of two lateral ice-breaker hulls arranged in symmetry relative to device centerline plane and central auxiliary ice-breaker hull. The latter is located in the device centerline plane ahead of lateral ice-breaker hulls so that its midship frame plane is located nearby the line drawn through stems of two lateral ice-breaker hulls. Note that its midship width makes at least 0.2 of that of lateral ice-breaker hulls. Central auxiliary and lateral ice-breaker hulls have inclined stem and are rigidly interconnected by the frame. Lateral ice-breaker hulls are asymmetric relative to their centerline plane. Their boards feature straight-wall design and feature equal midship width.

EFFECT: lower drag, wide clear-way.

1 dwg