Air Supported Monohull with Pod Propulsion

Friday, July 23, 2010
Photo courtesy Effect Ships International AS / SES Europe AS

Effect Ships International AS, Sandefjord, Norway has just launched their first Air Supported Vessel (ASV) monohull with pod propulsion. The patented ASV technology is the result of more than eight years of R&D, resulting in a full scale 65.6 ft x 17.7 ft test-vessel for demonstration and proof of concept.

Up to 80% of the vessel’s operational weight is supported on a cushion of pressurized air. Wetted surface area and friction between hull and water is reduced significantly. The size of the engines to propel the ASV’s can be reduced monumentally compared with the market leading conventional vessels of same size and performance. Whereas 2 x 1200 – 1360 HP (2.400 – 2.720 HP) is the norm for 65 ft pleasure boats with cruising speeds of around 30 knots, the ASV Mono test vessel has only 2 x 435 HP for propulsion. In addition approx 80 - 120 HP, depending on sea conditions, is required to power the lift fan. Fuel consumption is equally astonishing. At approx 30 knots speed the market leading international brands are using 11 – 13 liters pr Nautical Mile – the ASV Mono consumes only 5.7 liters in total (propulsion and lift fan power). Not only is this excellent economical news for the owner/operator of the vessel, it is certainly also amazing for the environment.  Reducing the emissions pr travelled distance by a staggering 50% represents a technological shift.

The ASV mono test vessel is using two small Volvo Penta IPS 600s. Pod propulsion combined with the new patented air supported vessel configuration is an ideal match. The installation of the driveline and lift fan system is extremely compact and requires modest space, leaving more than normal volume and space free for interior accommodation. The new ASV’s handles very well, the air cushion systems dampens the ride in waves and secure very good onboard motions. In harbor no bow thrusters will be required; the joystick operated pod propulsion can handled the vessel in most situations.

The ASV Mono concept has excellent scaling properties and will be suited for vessels from 42-50 ft in length upwards to 164 ft and more. The air support is active from standstill and contributes to almost no “hump”. The acceleration from standstill through to 20 – 25 – 30 knots is very fast due to the markedly reduced hull water resistance.  The wake wash is equally impressive, due to the high level of air cushion support the vessel rides high in the water with almost no trim and the resulting wake wash is considerably less than most other vessels. Depending on vessel configuration and size the ASV and pod propulsion combination will be just right for vessels with cruising speeds between 20 and 40 knots.
 

Maritime Reporter November 2014 Digital Edition
FREE Maritime Reporter Subscription
Latest Maritime News    rss feeds

Technology

Liquefaction Terminals to Dominate LNG Capital Expenditure

Capital expenditure (Capex) on global LNG facilities is expected to total $259 billion (bn) over the period 2015-2019, with investments expected to be 88% larger

Ennsub Delivers ROV Deployment Systems

Ennsub has completed the design and manufacture of two workclass remotely operated vehicle (WROV) deployment systems for ROVOP, due to be installed into a newbuild

Wärtsilä to Proceed with first LNG Terminal

Wärtsilä has been given full notice to proceed (NTP) from Manga LNG Oy for the supply of a liquefied natural gas (LNG) import terminal in Tornio, Northern Finland.

Marine Propulsion

Keeping to the Schedule in the Pacific Northwest

When a tightly scheduled repower for the Kodiak-based trawler Sea Mac in early December took a very bad turn, Mike Fourtner used his 25 years of fishing experience

New Chinese Shipyard Launches First Ship

The new shipyard facility of Honghua Offshore Oil & Gas Equipment Company in Jiangsu, China, has launched its first ship, an IMT982 Platform Supply Vessel. The vessel,

Multraship Buys Three More Tugboats from Damen

Multraship and Damen Shipyards Group agreed on three new ASD (Azimuth Stern Drive) Tugs, all for delivery to Multraship in 2015. After delivery in Vietnam, scheduled

 
 
Maritime Careers / Shipboard Positions Maritime Security Maritime Standards Naval Architecture Navigation Salvage Ship Electronics Ship Repair Sonar Winch
rss | archive | history | articles | privacy | terms and conditions | contributors | top maritime news | about us | copyright | maritime magazines
maritime security news | shipbuilding news | maritime industry | shipping news | maritime reporting | workboats news | ship design | maritime business

Time taken: 0.2810 sec (4 req/sec)