Two-Part Movable Stern Platform for Tender Launching
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Solution Overview
Problem
Existing movable stern platforms in boats have large surface dimensions, leading to high resistance and stress on the boat's stern, and often interfere with mechanical components.
Innovation Solution
A boat design with a movable platform comprising a fixed and movable part, where only a portion of the movable surface is submerged, using an articulated parallelogram actuation mechanism to prevent interference with mechanical elements and reduce stress.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of moving object
If the movable platform has large surface dimensions to provide adequate walkable area and tender support, then the platform can support passengers and small vessels effectively, but the resistance when lifting and retrieving the platform from water increases significantly
Solution Approach 1:
The movable platform is divided into two distinct parts: a fixed platform portion and a movable platform portion. The movable portion can be lowered into water independently while the fixed portion remains above water, reducing the submerged surface area and thus the resistance during lifting and retrieving operations.
Solution Approach 2:
Different portions of the platform structure serve different functions with different properties. The fixed platform portion provides stable walkable surface above water, while the movable platform portion provides tender support when lowered into water, allowing each part to be optimized for its specific function.
2Area of moving object
If the movable platform has large surface dimensions to provide adequate walkable area, then the platform can support passengers and small vessels effectively, but the weight of the platform increases resulting in higher stresses on the boat's stern
Solution Approach 1:
The platform is segmented into fixed and movable portions, allowing the heavy tender support function to be isolated to the movable part that can be lowered into water. The fixed portion above water can be lighter, reducing the overall stress on the boat's stern when the tender is not in use.
3Adaptability or versatility
If the movable platform is designed to be lowered into water for tender launching, then tender operations can be performed, but the platform may interfere with mechanical members such as surface propellers, flaps, and steering propellers
Solution Approach 1:
By dividing the platform into fixed and movable portions, the movable portion can be lowered into water clear of the mechanical members located at the stern, while the fixed portion remains positioned to avoid interference with propellers, flaps, and steering mechanisms.
Solution Approach 2:
The movable platform portion is lowered vertically into water, changing its spatial position from above-water to in-water level. This dimensional change allows the platform to perform tender launching functions without interfering with mechanical members that remain in the above-water or near-water zone at the stern.
Data Source
AI summary
A boat includes a hull having a movable stern platform which can be lowered into the water so as to allow to drop or retrieve a small vessel associated with the boat into/from such water. The stern platform includes two movable parts differently from each other.