This report presents and discusses the results of seaworthiness trials conducted aboard the USS ORTOLAN (ASR-22) subsequent to the installation of a between-hull forward foil and modifications to the forward bridging structure. Ship motion, hull strains, and bridging structure impacts are presented with comparisons made between the 'as built' and the 'modified' conditions. Results indicate that the addition of the foil, along with the bridging structure modifications, significantly improved the seaworthiness characteristics and operational limits of ORTOLAN, yielding a capable, seaworthy craft. Bridging structure impacts did not limit ORTOLAN's ability to transit at any heading or speed in seas up to and including a state 6 sea. Ship motions, while large, are not abnormal and strain measurements indicate that the main structural integrity of the ship at the locations investigated was not endangered at any time during the trials. However, local structural modifications are required on the second deck between Frames 12 through 21 along the port and starboard inboard hull plating. The foil did not break the water surface in seas having a maximum wave height over 30 feet.


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    Titel :

    Report on the USS ORTOLAN (ASR-22) Forward Foil Seakeeping Trials


    Beteiligte:
    D. A. Woolaver (Autor:in)

    Erscheinungsdatum :

    1975


    Format / Umfang :

    38 pages


    Medientyp :

    Report


    Format :

    Keine Angabe


    Sprache :

    Englisch




    ASR ORTOLAN Seakeeping Trials (As Build Configuration)

    D. A. Woolaver / E. W. Foley | NTIS | 1975


    Seakeeping Trials with HNLMS 'Tydeman'

    J. Gerritsma / W. Beukelman | NTIS | 1980


    Seakeeping Trials of Ships (Excerpts)

    I. V. Girs / A. A. Rusetskii / Y. A. Netsvetaev | NTIS | 1968


    Free-running models for seakeeping trials

    Blee, M.G. / Hawes, A.P.A. | Tema Archiv | 1981


    Seakeeping trials on O.W.S. Weather reporter

    Canham, H.J.S. / Cartwright, D.E. / Goodrich, G.J. et al. | Engineering Index Backfile | 1962