초록 ▼

Spaced cambered wedges having flow diverting surfaces thereon are deployed from retracted positions within the smooth surfaced sides of a marine vessel hull undergoing water travel above a high speed, under which air ventilated cavities are established by the deployed wedges along the sides of the h

Spaced cambered wedges having flow diverting surfaces thereon are deployed from retracted positions within the smooth surfaced sides of a marine vessel hull undergoing water travel above a high speed, under which air ventilated cavities are established by the deployed wedges along the sides of the hull, imposing drag on the hull sides of a substantially reduced magnitude as compared to that otherwise imposed directly by the water alone.

대표청구항 ▼

Spaced cambered wedges having flow diverting surfaces thereon are deployed from retracted positions within the smooth surfaced sides of a marine vessel hull undergoing water travel above a high speed, under which air ventilated cavities are established by the deployed wedges along the sides of the h

Spaced cambered wedges having flow diverting surfaces thereon are deployed from retracted positions within the smooth surfaced sides of a marine vessel hull undergoing water travel above a high speed, under which air ventilated cavities are established by the deployed wedges along the sides of the hull, imposing drag on the hull sides of a substantially reduced magnitude as compared to that otherwise imposed directly by the water alone. of powder in said housing by altering flow relationships inside said housing; and air extraction devices for extracting powder-laden air from said housing and disposed on at least one point along said empty run to prevent an uncontrolled spread of powder in said housing by altering flow relationships inside said housing; and channeling devices at least one of: leading air not laden with powder, fed into said interior of said housing downstream of said at least one of said air extraction devices and said air feed devices in said motion direction, into an air flow path along said empty run to transport the air not laden with powder in a direction of said at least one printing unit by suction; and at least impeding an inflow of powder-laden air from a region of at least one of s