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Showing 1 to 18 of 18 for “"Frigate"”.
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Manpower systems integration factors for frigate design in the Turkish Navy
… the manpower systems integration factors for frigate design in the Turkish Navy. The qualitative and quantitative analyses of the correlation between ship design specifications and manpower requirements play a pivotal role in this research. Information about 45 frigate classes from 29 …
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Redesign and shock analysis of HALIFAX class frigate gas turbine uptake structure
… gas turbine exhaust uptakes in the HALIFAX class frigates of the Canadian Navy have experienced thermally-induced fatigue cracking since soon after the commissioning of these ships. The uptake structure is heavily stiffened in order to meet shock resistance requirements. Unfortunately, the result …
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The identity and construction of Wreck Baker: a War of 1812 era Royal Navy frigate
… as Princess Charlotte. On Christmas Day 1814 the frigate HMS Psyche splashed into the ice cold waters of Lake Ontario to take part in a war that had ended one day earlier with the signing of the Treaty of Ghent. The Psyche's launch was the fourth of the year, following the frigates HMS Princess …
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Development of an experimental model to investigate the community dynamics of selected saprotrophic wood decomposer fungi from the frigate unicorn
An experimental microcosm system developed to investigate the community dynamics of two- and three-fungal species interactions is described. The microcosm consists of tessellated nutrient agar tiles allowing the varied prescription of: (1) the number of interacting fungal species; (2) the spatial …
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Numerical and experimental investigation of the effect of an inverted bow on the hydrodynamic performance of Navy combatant hull forms
… combatant hull, the Oliver Hazard Perry class frigate (FFG-7), with a modified version of the same hull with an inverted bow. The bow of the FFG-7 was redesigned by developing a set of basic curves that define the parametric surface of the new shape. Two 1/80th scale models were built, one of …
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Existing concepts in the law of the sea: possible bases for places of refuge?
… Under Spanish orders and shadowed by a naval frigate the Prestige was towed out to sea and then south towards Portuguese waters. Rough seas damaged it further and on the 15 th the master abandoned ship. Meanwhile, about 6,000 tons of oil escaped and were polluting the Spanish coast, fouling …
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Características en la transición laboral de miembros en situación de retiro de una de las fuerzas armadas del Perú
… who were invited to retreat from the ranks of Frigate Captain to Vice Admiral. The information was collected through the semi-structured interview. The main findings indicate that the transition of the seafarer to the civilian work environment is characterized by an increase in their income and …
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Development of a Graphical User Interface Presenting Turbulent Airflow Over A Flight-Deck For Improved Situational Awareness For Helicopter Pilots in Challenging Wind Conditions
… (SST) turbulence model using the Simplifed Frigate Shape 2 (SFSll) geometry. The 3D model was created for further testing in a simulator.The findings show interest exists within the helicopter pilot community for a capability to have identified where hazardous airflow is located over the …
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Adjustable Energy Saving Device for Transom Stern Hulls
… interceptor on the Oliver Hazard Perry class frigate (FFG-7), in order to assess the potential of propulsion power reduction in a wide range of speeds. This study is aimed to design a stern interceptor with optimal efficiency not only at top speed, but also cruising/transfer speeds, by a …
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Analysis of Ship Airwakes Using Modal Decomposition
… by a scaled model of a generic Navy ship (Simple Frigate Shape No. 2) was investigated in a low-speed wind tunnel. Stereoscopic, time-resolved particle image velocimetry (TR-PIV) measurements were made at six different crosswise planes over the flight deck region of the ship model, with and …
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Time-Resolved PIV Measurements of Ship Airwakes with Quartering Winds
… turbulent airwake over the Simple Frigate Ship No. 2 (SFS2) with quartering wind flow directions was studied in a low-speed wind tunnel facility. Surface oil flow visualization and time-resolved stereoscopic and planar particle image velocimetry (PIV) measurements were made for …
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A Study of Ship Airwakes Using Dual Plane Stereoscopic PIV
<p>The airwake of a model Simple Frigate Shape 2 (SFS2) was studied in a low-speed wind tunnel. This airwake was measured using a novel time-dependent, dual plane, stereoscopic particle image velocimetry approach. Two flow planes over the flight deck, one parallel and one perpendicular to the …
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A study of the Hyperiid Amphipoda in the waters off the east and south coasts of the Republic of South Africa in relation to prevailing hydrological conditions
… - 1958, it was decided that the hydrographic frigate, S.A.S. "Natal", as part of the South African contribution, should undertake a number of oceanographic cruises off the east and south coasts of the Republic of South Africa. Thus during 1958 three cruises were carried out in February and …
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His Majesty's Ship Saphire and the Royal Navy in 17th-Century Newfoundland
The English fifth-rate frigate Saphire was set on fire by its commander in Newfoundland during an attack by a French squadron in September 1696. Prior to its untimely sinking, this small warship had served the Royal Navy for over two decades, primarily in the Mediterranean, acting as convoy and …
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Beyond guns or butter : towards a multi-level analysis of South Africa's strategic defence procurement
… arms acquisition program comprising submarines, frigate-class ""corvette"" patrol vessels, fighter jets and trainers, and helicopters, at a projected cost of nearly ZAR30 billion. This decision, consequently, has plagued the government with continued controversy since its implementation. What …
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Contributions to the Understanding of Ship Airwakes Using Advanced Flow Diagnostic Techniques
… were performed on the SFS2 simplified frigate shape, which has a flight deck at its stern. The measurements were performed with and without a simulated atmospheric boundary layer (ABL), which included the aerodynamic scaling of its thickness, velocity profile, and turbulence. The ABL …
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Active and Passive Flow Control over the Flight Deck of Small Naval Vessels
Helicopter operations in the vicinity of small naval surface vessels often require excessive pilot workload. Because of the unsteady flow field and large mean velocity gradients, the envelope for flight operations is limited. This experimental investigation uses a 1:144 scale model of the U.S. Navy …
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La evacuación del buque de guerra : estudio del movimiento de personal en situaciones de emergencia
… We collected data from trials on board a DEG Frigate where 47 sailors of the actual compliment walked along narrow passages marching in groups of increasing size, opened and closed watertight doors and hatches, raised 60 degrees stairs and climbed vertical ladders in engine rooms escape …