Show BIG GREYHOUNDS MAY SAVE MORE MINUTES The LIVERPOOL The The remarkable steamIng steaming steaming steam steam- ing performances of the Lusitania Lus- Lus itania and following alterations alterations alterations altera altera- In their propellers have directed at ati attention attention at- at t to t the further r experiments e e carried car car- i JI te h f fled ried out t on n the Tyne with the specially constructed electrically driven model launch since the two liners entered the Atlantic service The experiments have been blen of great practical value in determining determining determining deter deter- mining the design of screw which has proved so efficient for both vessels Over twenty-four twenty different sets of three-bladed three and seventeen sets of four-bladed four propellers propel propel- propellers lers were tested the result of which was that with those finally selected a saving of about 8 S per ce cent t in the horsepower could be predicted at maximum speeds while pr practically aH all vibration could be e eliminated mn The l has has only t two of f the test lest est propellers fitted viz the four bladed on the w wing Hwing g shafts bladed and don therefore It is n not of un unlikely y that further speed records will ll be made de if tf similar propellers are fI fit fitted ted on the inner shafts sare sare |