Recent progress on ducks

Recent progress on ducks

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Until the end of 1978, the team at Edinburgh put most of its effort into small-scale laboratory tests with increasing levels of hydrodynamic realism. Some test results show that the requirement for rigidity of the duck backbone is much lower than was predicted, and that in waves with lengths of twenty diameters and more, there are considerable benefits to be derived from controlled backbone movements. Since the beginning of 1979, we have been working on the problems of full-scale design. The CEGB-preferred schemes use low-pressure air turbines, asynchronous generation, d.c. transmission, serial connections and simple designs with reliability achieved by easy access and maintenance. We prefer high-pressure oil hydraulics, synchronous generation, a.c. transmission and parallel connections. We exploit the techniques of modern electronics and plan to achieve reliability by total hermetic sealing of the power conversion mechanism which will exclude all organisms, both marine and human. I shall attempt to justify our approach.


    1. 1)
      • B.M. Count . (1979) The absorption of energy from ocean waves, Future energy concepts.
    2. 2)
      • I. Glendenning . (1979) Wave power – some practical considerations, Future energy concepts.
    3. 3)
      • Mei, C.C., Newman, J.N.: `Wave power extraction by floating bodies', Presented at 1st Symposium on Wave Energy Utilisation, 1979, Gothenburg.
    4. 4)
      • Standing, R.G.: `Use of potential flow theory in evaluating focus on offshore structures', Presented at the IMA conference on power from sea waves, 1979, Edinburgh, in press.
    5. 5)
      • D.V. Evans . The submerged cylinder wave energy device: theory and experiment. Appl. Ocean Res. , 3 - 12
    6. 6)
      • J.R. Morison . The force exerted by surface waves on piles. Petroleum Trans. AIME , 149 - 154
    7. 7)
      • Dixon, A.G.: , Ph.D.Thesis, University of Edinburgh, in press.
    8. 8)
      • F.J. Camm . (1956) , The elements of mechanics and mechanisms.
    9. 9)
      • K.C. Barnaby . (1969) , Basic naval architecture.
    10. 10)
      • Clerk, R.C.: `An ultra-wide speed range high efficiency hydraulic pump/motor power transmission', Conf. 77.1053, Presented at the Flywheel Technology Symposium, 1977, San Francisco, p. 331–334.
    11. 11)
      • Clerk, R.C.: `The prestressed laminated flywheel and its hydro-vac ambience', Conf 77.1053, Presented at the Flywheel Technology Symposium, 1977, San Francisco, p. 167–180.
    12. 12)
      • O. Schlick . The gyroscopic effect of flywheels on board ship. Trans. Inst. Nav. Archt. , 117 - 147
    13. 13)
      • de Santis, R., Russo, M.: `Rolling of SS “Conte di Savoia” in tank experiments and at sea', Presented at the Conference of the Society of Naval Architects and Marine Engineers, 1936, p. 169–194.
    14. 14)
      • (1979) , Future energy concepts.
    15. 15)
      • M.S. Longuet-Higgins , R.W. Stewart . Radiation stress in water waves: a physical discussion, with applications. Deep-Sea Res. , 529 - 526
    16. 16)
      • M.S. Longuet-Higgins . The mean forces on floating or submerged bodies with applications to sand bars and wave power machines. Proc. Roy. Soc. Lond. A , 463 - 480
    17. 17)
      • Edinburgh Scopa Laing 5th Year Report, 1979.

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