Fast Ferry Modified to Launch Torpedoes

Tuesday, June 01, 2004
Gladding-Hearn Shipbuilding’s fast ferry building expertise has taken an unusual turn, with the testing of a new torpedo-launching system for the U.S. Navy. Systems Engineering Associates Corporation (SEA CORP) of Middletown, R.I., chartered Millennium, the 125-ft. Incat-designed high-speed passenger ferry owned by Rhode Island Fast Ferry and built by the Somerset, Mass., shipyard in 1998 in May, to test an experimental surface torpedo launching system under development by NAVSEA. The catamaran’s 37-knot light speed and open third deck were ideally suited to simulate launching from a destroyer or carrier deck.

Using their 3-D Finite Element Modeling (FEM) capability, the shipyard’s engineering staff designed a removable foundation to absorb the 12,000-pound reaction force, produced when launching a 750-pound simulated projectile. To facilitate the vessel’s quick return to ferry service, the shipyard imbedded a series of threaded inserts in the primary deck structure through the lightweight extruded aluminum decking.

“A 12,000 pound reaction force is relatively small when compared to the Millennium’s normal passenger load, but not trivial when you consider the light aluminum structure and small area over which it was spread,” explained Peter Duclos, the shipyard’s president director of business development. “The FEM quickly showed us the areas of highest stress and allowed us to efficiently design a cost-effective solution.”

The new launcher technology, which was developed jointly by the Naval Undersea Warfare Center (NUWC) and SEA CORP, uses multiple standard automotive auto bag inflators to provide the energy to launch payloads. “This technology makes possible for the first time a sealed and completely modular torpedo launch canister for surface warships, said NUWC engineer David Godfrey.

The launcher was tested in a secured section of Narragansett Bay in mid-May. The vessel returned immediately afterwards to scheduled ferry service between Quonset Point, R.I., and Martha’s Vineyard, Massachusetts

Maritime Reporter September 2015 Digital Edition
FREE Maritime Reporter Subscription
Latest Maritime News    rss feeds


New Jersey Transportation Chief to Resign

New Jersey Governor Chris Christie on Friday said his transportation commissioner Jamie Fox would step down by the end of the month to return to the private sector after only a year in the position.

Eletrobras says Compensation for Hydro Plants Could be $330 mln

Brazil's state-run utility Eletrobras said on Friday a report into six hydroelectric plants found the assets had a remaining value of 1.3 billion reais ($332

Brazil Court Allows Lula Questioning in Petrobras Corruption Case

Brazil's Supreme Court authorized the questioning by Federal Police of ex-President Luiz Inácio Lula da Silva as a witness in a broadening corruption case focused

Maritime Contracts Maritime Standards Naval Architecture Navigation Pod Propulsion Salvage Ship Electronics Ship Simulators Shipbuilding / Vessel Construction Winch
rss | archive | history | articles | privacy | 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: 0.1651 sec (6 req/sec)