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Gmotion Dual Speed Hull Design reduces resistance by 45%

Design

Lots of superyacht concepts are of a magnitude and budget that the potential for realising such fantasies rarely becomes a reality. Approaching the current changing market from an unusual approach has enabled 2 designers to develop designs that are not based on their own preferences but those expressed directly as briefs from two qualified potential buyers.

Both clients' briefs were almost identical; the expedition yacht design must be pragmatic in a style which enabled owner friendly operation including launch and retrieval of watercraft and when necessary, drive the boat themselves. The most unusual item of both clients brief was that they wanted their expedition yachts to move away from the trawler style and take on a more aggressive and sexy external styling. One thing the shipbuilding industry knows is there are no sexy expedition yachts.

Naval architect Stuart Friezer took this challenge head on and rather than creating a design to match the standards of performance speed and economy of existing expedition yachts he used them as a starting benchmark from which to improve.

The Gmotion design uses design elements from sailing skiffs and wave piercing catamarans in order to achieve an efficient "dual speed" hull shape. After exhaustive design development Stuart modelled his creation, the Gmotion hull form, and the existing yacht, and ran both through comparative resistance testing.

The results proved Stuart's theory that the longer hull form with a fine bow and skiff like shape was far superior to traditional trawler type hull forms predominant on yachts of this style. The Gmotion hull shape offers more efficient cruise speeds both below hull speed and above.

When the results had validated the idea of a dual speed expedition yacht Stuart asked Ricky Smith who had been in attendance at both client meetings to undertake the challenge of styling the G Motion hull form into a sexy motor yacht with an interior driven by the same pragmatic approach applied to the hull. The result is a distinctive exterior styling which retains a powerful masculine, hard edged feel without unnecessary knuckles, styling complications or adornment. Sweeping stairs wrap around 180 degree full height glass slide away doors, and while the exterior styling has been simplified and references contempory minimalism it has an understated elegance.

On the GM34 model the traditional flybridge has been replaced by an oversized crow's nest deck offering both retreat privacy and a great vantage point lookout. This is due to having the oversized decks, mid terrace deck, open transom terracing available as well as the dining banquette offered on the foredeck. The inclusion of the pod drive units resulted in enlarged accommodation spaces on the lower deck. The designers added a unique full beam lower deck guest's Media Room or casual saloon facility at the bottom of the guests stairs which can also be sectioned off the hallway and create an addition 2 rooms if needed.

Arriving on the lower deck into an open full beam space rather than a hallway is typical to the designs of Gmotion Yachts range where light and panorama are major considerations for those on board. The confluence of naval architecture and interior designer is not common; naval architecture being an engineering science and interior design an aesthetic driven practice. Stuart proposed designing the interior bulkhead structure to the interior concept thereby effectively cutting out material, weight and build time.

The end result is an interior design which presents the facilities expected in such a vessel as well as having an underlying cost benefit ethic of reducing unnecessary time, materials and cost. When the interior and exterior styling were first completed they decided to test the market with a last minute visit to the 2012 Monaco Yacht Show where they presented the design to selected top brokers and shipyards present. Overwhelmed by the positive responses from the industry the pair of designers were immediately approached by a European yard to design a 25m Gmotion version to align with their current market and sales demographic. GMotionYachts.com was formed and the first design requested returned for consideration in just under 4 weeks.

The Gmotion Yachts Expedition Series models 34 and 25 both feature large open aft decks with a unique feature where the tender and jet ski is housed on a mid terrace platform between the aft deck and the aft stairs. This lowered terrace design feature ensures the aft view from the interior is not impeded while cruising. It also, then creates a mid terrace beach deck open to the transom with masses of locker storage for sun lounges, barbeques and fender stowage in the most perfect location for access.

Gmotion Yachts
www.gmotionyachts.com

Stuart Friezer
+45 4240 1878
[email protected]

Ricky Smith
+614 38591122
[email protected]
www.rickysmithdesigns.com.au

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