In a basin water can be circulated in a 2.5 m wide and 1.2 m deep vertical loop by two horizontal variable pitch axial flow pumps located in the part of the loop below a test basin, which is 4.0 m long. Each pump can deliver up to 180,000 liters of water per minute. With a simple control knob, feeding an electronic device, the water velocity through the test basin can be varied from 0 up to 2.0 m/sec with an accuracy of 0.02 m/sec. The highest speed corresponds to swimming 100 m in 50 sec.. Thanks to vaneguided bends at the ends of the basin the water flow can be maintained 1aminar and essientia11y homogeneous in the center part of the canal where the subject swims Human safety is achieved by a net fixed at the end of the test basin and an emergency stop at the control box. The principles of the apparatus is shown in Fig. 1.
© Copyright 1971 First International Symposium on "Biomechanics and Swimming, Waterpolo and Diving", 14-16 September 1970. Proceedings. Published by Universite Libre de Bruxelles; Laboratoire de l'effort. All rights reserved.