Crest of the Royal National Institution of Naval Architects - Click to return to the homepage

The Royal Institute of Naval Architects

Man Energy Hybrid


Alfa-Laval Sept 2019


Paper Title: Experimental Investigations into the Resistance Components of Symmetrical Catamarans with Variations in Hull Clearances and Staggers



A Jamaluddin, Indonesian Hydrodynamics Laboratory, Surabaya, Indonesia
I K A P Utama and W D Aryawan, Dept. of Naval Architecture & Shipbuilding Eng., ITS, Surabaya - Indonesia
B Widodo, Dept. of Mathematics, ITS, Surabaya, Indonesia


The effect of resistance interference on catamarans was investigated experimentally. The model hull forms comprise a symmetrical catamaran along with laterally separated and longitudinally staggered demihull configurations. To this aim, a series of tests on the models were conducted at the Towing Tank of the Indonesia Hydrodynamic Laboratory (IHL) over a speed range corresponding to Froude numbers of up to 0.65. In this paper, experimental results are presented in tabular and graphical form and the resistance characteristics and interference effects are discussed and compared with other published data. The test results show that favourable interference has been observed around Fr> 0.5 for the hull clearance and around Fr = 0.4 ­ 0.55 for the staggered catamarans. These results may prove useful for designers at the conceptual or preliminary design stages.


Transactions RINA, Vol 154, Part B1, International Journal of Small Craft Technology, Jan-Jun 2012 

DOI number

DOI No: 10.3940/rina.ijsct.2012.b1.122 

Search and Order IJSCT papers

All International Journal of Small Craft Technology (IJSCT) papers are listed in the RINA Publications Database. You can search the database by author name and paper title. Publications may be ordered and paid for online. Other publications are also listed, some of which may be downloaded free of charge. Follow the link to Search Publications & Order.



Seatrade informa June


Safety at Sea

Marintec 2019

Man Energy Survey - Sept

AHOY Europort 2019