Video: Heesen completes biggest hull and superstructure assembly to date

Heesen Yachts has taken a step forward in the construction of 80-metre superyacht Project Cosmos at its yard in Oss, the Netherlands. Following construction of the company’s largest aluminium hull to date, the hull and superstructure of the yacht were joined and the engines installed.

Cosmos is a tri-decked, 1700 gross tonnage yacht with four engines and more than 19,000 horsepower. Its profile was designed by British studio Winch Design. It will be capable of reaching close to 30 knots once delivered and have an efficient cruising speed of 20+ knots.

After 15 months of skilled welding, the 80.07-metre low-drag latest iteration of the Fast Displacement Hull Form, which sports Heesen’s patented “back bone” for longitudinal strength, left the aluminium workshop in shed six. After the weighing process, Cosmos’ hull was gently driven onto a barge by two remote controlled multi-wheelers.

This is a delicate process that once started cannot be stopped. To ensure perfect stability during this precise balancing act, the barge was carefully ballasted to ensure a seamless transition when transferring the weight of the hull. The barge was then towed across the canal to a quay large enough to carry out the lifting operations. It took four of the Netherlands’ largest telescopic cranes to lift the hull from the barge and place it in the water.

During the same operation, Cosmos’ propulsion system was installed. Four engines and two gearboxes, which will interact with variable-pitch propellers and the ultra-innovative Promas rudders, were placed in the hull.

A video of the entire operation can be found below.

The yacht will now undergo the outfitting process in the run up to the launch in 2021.

Author: Mariska Buitendijk

Mariska Buitendijk is one of SWZ|Maritime's journalists as well as the magazine's copy editor.