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Kamath P.,SOLAS Marine Group | Nazarov A.,Albatross Marine Design
RINA, Royal Institution of Naval Architects - International Conference Warship 2013: Minor Warships | Year: 2013

The paper presents the process and results of development of 16m composite fast interceptor craft for Indian Navy built by SOLAS Marine Lanka following the design by Albatross Marine Design. Requirements and approaches to design analysis and optimisation presented using parametric design methods. The performance and seakeeping of craft at design stage studied by tank testing and compared with results of sea trials. Special consideration is given to vertical acceleration levels and reduction of their impact on personnel by using shock-mitigation measures. Structural design and optimisation made with comparison of different structural rules, also using FEA methods and testing of samples. © 2013: The Royal Institution of Naval Architects.

Ghelani H.,Mahindra Marine PVT. LTD. | Lathapreecha T.,Albatross Marine Design | Nazarov A.,Albatross Marine Design
RINA, Royal Institution of Naval Architects - International Conference on Ship and Offshore Technology, ICSOT India 2015: Coastal and Inland Shipping | Year: 2015

The paper presents scope of problems involved in design and construction of small craft (i.e. craft below 24m in hull length) with composite materials for clients in India. Special attention is given to verification of tender specifications for feasibility and efficiency. The verification is based on parametric method of combined analysis of hull dimensions and volumes, weight estimates, performance and range, seakeeping. Known problems with typical tender specification for small craft are outlined, namely practically achievable scope of approvals by classification society, 'proven hull' approach, performance indicators and some others. Recommendations are given on rules, standards and design technologies applicable for small craft designed for special/paramilitary and commercial applications. The production process is reviewed from the point of practical manufacturing and quality control, with emphasis on known discrepancies in composite craft production. Case studies cover pleasure craft and patrol craft built by Mahindra Marine, and some perspective projects. © 2015: The Royal Institution of Naval Architects.

Nazarov A.,Albatross Marine Design | Jabtanom P.,Albatross Marine Design | Phormtan P.,Albatross Marine Design | Leeprasert A.,Albatross Marine Design | Suebyiw P.,Albatross Marine Design
RINA, Royal Institution of Naval Architects - International Conference on Design and Construction of Super and Mega Yachts | Year: 2013

The paper presents the review of design experience for catamarans 18...36m in length developed by Albatross Marine Design and features perspectives of application of this experience to superyacht range. Comparison of catamarans with traditional monohull motor yacht is presented in terms of usable space and layout concepts. Possible areas and ranges of application of catamaran platform are specified. General dimensioning of catamarans at early design stages based on parametric study is reviewed. Recommendations on performance prediction and related hull shape design issues are given. Seakeeping of catamarans is studied based on results of full-size measurements of vertical accelerations for number of vessels, with reference to existing calculation methods. Structural requirements for catamaran designs and major load cases are specified with references to applicable structural engineering approaches. Samples of structural solutions and design optimization for composite catamarans are presented. Styling trends and new approaches for layout planning specific for catamarans are discussed. Presented are results of sea trails for number of catamarans and new design samples. © 2013: The Royal Institution of Naval Architects.

Nazarov A.,Albatross Marine Design
RINA, Royal Institution of Naval Architects - International Conference in Marine Design, Papers | Year: 2011

Paper presents retrospective of problems involved in small craft design and styling, following design philosophy and solutions from practicing boat design office. The approach to design as 'solution of particular task' is presented. Design is studied as compromise of five qualities: aesthetics, comfort, performance, safety and cost. Contemporary trends in boat styling are analyzed, architectural types of boats and yachts are defined. Influence of rules of classification societies and standards on design is discussed. Comparison of safety and comfort considerations and their effect on design are presented for two boats of similar size. Sample designs are presented as illustrations covering pleasure, small commercial and special craft. ©2011: The Royal Institution of Naval Architects.

Nazarov A.,Albatross Marine Design
Transactions of the Royal Institution of Naval Architects Part B: International Journal of Small Craft Technology | Year: 2015

The paper presents the review of design experience and applied research of catamaran craft, up to 30m in length, of total over 30 catamaran designs, developed by 'Albatross Marine Design' and launched during recent years. Architecture of catamarans is discussed; typical catamaran hull shapes are reviewed and their suitability for different applications and desired speeds are studied. Recommendations are given for hull shape particulars selection. Performance issues are studied using available theoretical methods and sea-trials data of number catamarans. Components of resistance of catamarans and methods of their prediction are reviewed. Comparison of methods is presented and samples of their applications for hull shape selection are shown. Seakeeping performance is discussed in terms of vertical accelerations. Results of full-scale measurements of vertical accelerations on number of craft are presented. Controllability discussion is based on turning track measurements for power catamarans of different configurations at different speeds. Structural design issues are reviewed with special interest in composite craft and their improvements. Perspective applications of catamaran concept for different types of craft are indicated. Presented are samples of catamaran designs for special, small commercial and pleasure catamarans. © 2015: The Royal Institution of Naval Architects.

Nazarov A.,Albatross Marine Design
RINA, Royal Institution of Naval Architects - Damaged Ship III, Papers | Year: 2015

Unfortunately, often for craft below 24m in length certification bodies apply approaches inherited from larger vessels; this might turn out to be unpractical and even dangerous. Specifics of small craft freeboard and stability needs to be clearly understood; based on practical design experiences this paper presents the systematization of existing approaches with conclusion on applicability and recommendations for further improvements. Freeboard requirements of different rules and standards are reviewed and compared with results of modeling and statistics; new generalized approach for freeboard assignment is proposed. Intact stability criteria are categorized; sets of criteria from different rules and standards are compared. Based on existing designs, significance factors of different stability criterions are analyzed depending on category and size of craft. Of practical interest are requirements and realities for small craft inclining test procedures, and also approaches to multihull craft stability assessment. Damaged stability is reviewed in terms of feasibility of required damage cases for small craft, with respect to their confined spaces and layout limitations. Significance factors of damaged stability criterions are studied and priority cases to be considered are identified. Recommendations for location of watertight bulkheads and buoyancy elements on small craft are given. Conclusions useful at early stages of design are provided. © 2015: The Royal Institution of Naval Architects.

Nazarov A.,Albatross Marine Design
2nd Chesapeake Power Boat Symposium 2010 | Year: 2010

The experience of power catamaran design and research is presented, covering planning and displacement catamarans 6 to 24m in length developed by 'Albatross Marine Design' during recent years. The classifications of hull shapes are provided in respect of mode of operation, desired speed and applications. Recommendations are given for hull shape particulars selection, namely for LCG, CP, deadrise, submersed transom area, static load factor, etc. in the form of diagrams. Tunnel shaping is studied in terms of performance and sea keeping, and various approaches are reviewed. Recommendations for vertical and horizontal tunnel clearances are given, based on calculations and tests. Special attention is paid to hulls interaction and slamming areas. Photographic records of tunnel flows are provided for different speeds. Components of resistance are discussed and reviews of available methods of catamarans performance predictions are given, with recommendations for their application. A diagram is proposed for estimation of required power versus speed at early stages of design. Sea keeping is studied in terms of operational safety and ride comfort. Maneuverability is discussed based on GPS track measurements, where variation of the turning circle based on the beam is noted. A study of the weights of composite structures is presented for several options of a 10m power catamaran, starting from basic CSM laminates to high-tech solutions. Samples designs are presented, reflecting company's experience in the fields of rescue, work and pleasure catamarans.

Nazarov A.,Albatross Marine Design | Jabtanom A.,Albatross Marine Design | Charatsidis N.,Albatross Marine Design
RINA, Royal Institution of Naval Architects - Marine Design, Papers | Year: 2014

This paper presents retrospective of problems involved in design and styling of small passenger boats, intended for inland and costal transportation such as tourist vessels, shuttle ferries, water taxis, diveboats based on design experience of Albatross Marine Design. Historical and cultural considerations are given with some samples representing traditional passenger craft from different parts of the world. The phenomena of water taxi as integral part of today's urban environment is revived in terms of consumer expectations and trends. Different concepts are reviewed including monohull craft, catamarans, hydrofoil, ACV, WIG etc. Weighted criteria are offered to evaluate applicability of those concepts for small passenger craft for particular tasks. Ergonomics of small passenger craft is studied in terms of feasible dimensions and possible compromise with requirements for bigger ships. Typical interior layouts are discussed with criteria proposed to assess its efficiency. Seating arrangements, boarding options, luggage storage areas etc. for comfort and safety are analysed. Special attention is given to accessibility for passengers with disabilities or mobility restrictions. Application of colour schemes and art graphic as important features of exterior styling and customisation in mass production world is presented. Regulatory aspects are reviewed giving the comparison of requirements to small passenger craft in some jurisdictions. © 2014: The Royal Institution of Naval Architects.

Nazarov A.,Albatross Marine Design
Transactions - Society of Naval Architects and Marine Engineers | Year: 2014

Albatross Marine Design (AMD) is working on design and construction of composite pleasure, commercial and special craft built in number of countries in Asia and Europe. High speed craft with their often complicated geometry and operational profiles are subject to considerable global and localstructural loads. For special craft, mission has to be performed often in extreme environments thus their structures should be carefully treated at design stage with concern given to structural optimization and weight. Though most of the rules rely on stress (or strain) criterion plus allowable deformation, there are some differences in specific criteria such as minimum thickness requirements, buckling, etc. Composites are combustible material that imposes some limitations on their use where the craft has to comply with IMO Codes and class requirements. Temporary molds made of plywood or MDF can be applied, for the cost of 20-30% of permanent tooling; such molds allow up to 2-4 hulls with some repair. The molds are assembled of pre-cut panels extracted from computer model. Assembling in pre-fabricated panels and shells or strip-planking in foam strips are popular method for the one-off craft for ease and speed of construction.

Nazarov A.,Albatross Marine Design
3rd Chesapeake Power Boat Symposium, CPBS 2012 | Year: 2012

Paper describes features of parametric method based on combined analysis of main dimensions and volumes, weight components, performance and range predictions, seakeeping and construction cost of planing craft. Method is derived from statistics of designs of special, pleasure and small commercial monohull craft with hull length below 30m, developed by Albatross Marine Design. Dimensions of hull are defined from usable areas and essential volumes, with recommendations provided for different architectural types of boats. Equations are proposed for weight groups based on hull dimensions, horsepower, type of propulsion system, level of accommodations and furnishing, required payload, etc. Approaches for preliminary estimate of powering, range, fuel efficiency, ride stability are provided. Method proved to be efficient tool for design analysis, optimization and feasibility check of design requirements. Case studies are presented illustrating application of parametric approach for different designs.

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