... passing fixed obstructions in channels, such as bridge piers and Venturi flumes. The theoretical treatment is essentially the same. 52. Curiously, however, self-propelled ships can move only in the sub-critical range. Acceleration into, and beyond, the critical range is prevented at a barrier speed...

...JF RIDDELL © Thomas Telford and ICE 1982 STRATHCLYDE UNIVERSITY DREDGERS BUCKETS LADDERS RIVERS WATERWAYS DEEPENING HARBOURS CONSTRUCTION PORTS DEVELOPMENT MACHINERY HISTORY DREDGING STEAM POWER SHIPS SPOIL DISPOSAL SELF PROPELLED VESSELS MATERIALS EXCAVATING...

...T CONSTANTINE MANCHESTER UNIVERSITY BEHAVIOUR SHIPS WATERWAYS RESTRICTED CANALS SQUATTING INVESTIGATIONS SPEED RANGE SUBCRITICAL SUPERCRITICAL POWER TESTS MODELS TOWED TOWING SELF PROPELLED THEORY © Thomas Telford and ICE 1961 Paper No. 6499 THE BEHAVIOUR OF S H I...