Vízügyi Közlemények, 1948 (30. évfolyam)
2. szám - VII. Szakirodalom
(34) meters. Values read simultaneously on the dynamometer and the stop watch have precisely registered the statical effects daring the process of filling. From Figure 5 it appears that the filling is most advantageous when the filling curve approaches the straight line. Figure 6/a and b show the statical effects appearing during the process of filling and discharging, i. e. at the opening periods of one, two or three minutes, measured in locks with 5 meter niveau differences. On the abscissas the funicular forces are shown in tons at the time of filling and discharging, to the left or to the right hand side in accordance whether the force moves the vessel models upstream or downstream. On the vertical axis the variation of the time is recorded in seconds. The chronological process of the force effects reaching the vessel at the time of filling is oscillation. The force of the water rushing in at the beginning of the filling has the tendency of moving the vessel downwards but because the space of the liquid is a limited one the recoiling of the waves will roll the vessel upwards, and the process will repeat itself diminishingly. The play of the waves may be observed closely on the lines of the dynamometers affixed to the vessels. On Figure 7 ja and b it may be seen that by the increasing of the opening period to two or three minutes better filling results may be achieved. On locks reconstructed for 1200 tons vessels in connection with Figure 8 it has been examined whether the placing of the previous small vessel types is more favorable on the downstream or on the upstream side of the lock. It follows from the illustrated diagrams that the discharging is of a less sensitive 4 nature than filling. In conclusion there are shown two Tables which show the results of a few experimental series. In the first one the various filling systems and the funicular forces observed in function of the time of the opening are demonstrated, while in Table II. the maximum funicular forces answering the various op г ni n g periods as well as the maximum and the average ,,/<" values (contraction coefficient) of the conduite may be seen on the filling arrangements shown in Fig. 4. Data compiled in the tables will lead to the stated conclusions. * * * I cannot hep but recollect in retrospect with the greatest affection and appreciation my Finnish friends and colleagues — first of all Professor J. PAATELA, rector of the University and the University Professors, H. P. O. SOLIT ANDER and V. HEISKANEN — who rendered my stay in Finland not only an instructive one but also an eventful occasion. The purpose of this brief review is therefore also an effort to revive the connections of the Finnish and Hungarian Engineer Corps which so happily started.
