Brødrene Aa as | 6829 Hyen | Tlf: 57 86 87 00 | Faks: 57 86 99 14 | E-post: firstname.lastname@example.org | www.braa.no Carbon fibre in commercial craft More than 90% of the total amount of fibre used in a vessel is carbon fibre, only a small amount of glass fibre is used (details) Structural weight reduction compared to aluminium is 40-50%. Reduced structural weight is achieved in the periphery of the construction this giving a significant reduction in the mass of inertia (influences on sea keeping characteristics) Commercial high speed craft are regulated by the IMO HSC 2000 code. To comply with the required fire properties extended use of FRM (according to the FTP code is used) The high stiffness to weight ratio allows for use of large windows, doors and similar design features (this is also experience in the design of the large aircrafts i.e. Airbus 380)
Brødrene Aa as | 6829 Hyen | Tlf: 57 86 87 00 | Faks: 57 86 99 14 | E-post: email@example.com | www.braa.no Yard 266, ”Eyr Bremstein” 20,0 m, march-2012 Yard 267 ”Eyr Myken” 20 m, may-2012 Yard 264, ”Rygervakt” 20,9 m, november-2011 Yard 265, ”Eyr Ytterholmen”, 20,0m–january-2012 Vessels with IPS propulsion Yard 269, ”Solundir” 22 m, December 2012 Yard 271, ”TBD” 22 m, April 2013
Brødrene Aa as | 6829 Hyen | Tlf: 57 86 87 00 | Faks: 57 86 99 14 | E-post: firstname.lastname@example.org | www.braa.no Palmer Johnson yacht 48m Br. AA to manufacture all structures in composite Extended use of water jet cutting of internal structure. All carbon fibre Hull and superstructure scheduled to be delivered in November 2012
Propulsion concepts used in Br. Aa projects Propulsions concept Typical supplier Typical ship concept SpeedTypical engine size Rating Controllable pitch Propellers (CPP) ServogearCatamarans25-30750 kw 1000 kw Medium Fixed propellers (FP) West Mekan Catamarans301440 kwMedium Water jetKameWa FF-Jet Hamilton Catamarans Ambulance boats 30-401440 kw 750 kw Medium Light PODVolvo IPSAmbulance boats25-35750 kw 500 kw Light
Brødrene Aa as | 6829 Hyen | Tlf: 57 86 87 00 | Faks: 57 86 99 14 | E-post: email@example.com | www.braa.no Experiences with the IPS system + Low noise level inboard + Low propeller induced vibrations to the hull + High manoeuvrability + Propulsion efficiency comparable with standard FP & CPP systems + Good failure mode effect (FMEA) properties + One supplier – complete propulsion package + Compact and space saving concept – low integration cost. ÷ Currently low TBO interval, not suitable for medium rating services ÷ Still some challenges related to approval by class societies and administrations ÷ Requires hull designed for POD propulsion – particular for planning V-bottom ÷ Due to fixed propeller, crash stop length is higher than typical CPP and water jet ÷ Currently engine/POD is limited to max 588 kW, a higher power is appreciated (typical 750 kW and 1000kW) ÷ Some improvement on the service for commercial operators is appreciated
Brødrene Aa as | 6829 Hyen | Tlf: 57 86 87 00 | Faks: 57 86 99 14 | E-post: firstname.lastname@example.org | www.braa.no The future - challenges Steadily increasing focus on the environmental areas i.e. noise, vibrations, emissions, CO2 print etc- Increasing fuel cost requires more fuel efficient designs, weight and complexity is key parameters. Improved manoeuvrability is required in order to reduce time for port calls, typical for services with frequent port calls. Single point of contact for services is appreciated in order to reduce operators administration costs It is to be expected that due to emission control requirements, the complexity of the engines will increase. Engines of truck origin will have a larger production volume and this will be reflected in price and spare part availabilities. Ship owner tends to focus in life time cost – not only investments.