In the field of modern shipbuilding, there is a fascinating practice that may seem somewhat counterintuitive at first glance: building yacht hulls upside down. Not only is this method fascinating, but it also offers numerous advantages, especially when constructing explorer yachts with a combination of steel hulls and aluminum superstructures. Let's take a closer look at why shipyards are opting for this unconventional technique and the clear advantages it offers.

Why build yacht hulls upside down?

The upside-down construction technique, also known as inversion construction, is often used in shipyards that build large ships. The main reason for this innovative approach lies in the physical properties of the materials used and the ultimate goal of optimizing the entire construction process.

Building a ship upside down makes it easier for shipbuilders to work on the hull, especially when welding. Overhead welding is a challenging task even for experienced professionals. It requires a different skill set compared to regular welding and can also increase the risk of defects and inconsistencies. However, when a hull is built upside down, shipbuilders can perform welding at working height, which is usually more comfortable and allows for better quality control.

In the case of explorer yachts, these vessels often have a steel hull combined with an aluminum superstructure. Steel is chosen for the hull because of its excellent durability and resistance to rough sea conditions, which makes it ideal for vessels intended for navigation in demanding waters. Conversely, aluminum is used for the superstructure because of its lightness and high corrosion resistance.

Rotating the hull and combining different materials

When the steel hull of an Explorer yacht is completed, it goes through a process known as "turning the hull". This is a monumental event in the shipbuilding process, requiring a team of experts and specialized equipment to ensure that the hull is safely and effectively rotated into an upright position.

Once the hull is erected, the aluminum superstructure is added. The robust steel hull is able to withstand the toughest sea conditions, while the lightweight aluminum superstructure provides stability and efficiency by reducing the overall weight of the vessel and lowering fuel consumption.

Advantages of building hulls upside down and combining materials

Improved weld quality: As mentioned above, building hulls upside down greatly facilitates welding. This process improves the quality of the welds, which in turn increases the overall strength and durability of the vessel.

Increased efficiency: The technology shortens the time required in shipbuilding, mainly through increased efficiency in welding operations. This time-saving factor results in faster delivery times and improved productivity for shipyards.

Increased safety: Head-over-head construction increases worker safety. They can perform welding work without having to work overhead, reducing the risk of workplace accidents.