194 



ELECTRIC PROPULSION OF THE U. S. S. JUPITER. 



jured through the breaking of a half-inch top bolt, which held the section of sta- 

 tionary buckets used in the first stage of this machine. On account of this trouble 

 her official trial has been postponed, and it is hoped that the steam pipe will be 

 changed and a separator put in before the official trial is made. A section of sta- 

 tionary buckets held by these bolts is the only detachable part in this turbine. Tap 

 bolts are subject to the danger of breaking under such conditions, and we have had 

 trouble with such method of attachment in other turbines. The matter in this case 

 was, however, unfortunately overlooked. The trouble is easily corrected, and the ac- 

 cident has no significant bearing upon the demonstration which this ship has made. 

 While this bolt destroyed all the buckets in the first stage, the turbine was still 

 capable of operation. The turbine was taken apart because it was seen that the 

 economy was not normal. By taking out the bolt which was adrift and clearing 

 the damaged parts which might interfere, the ship could still have been operated 

 indefinitely at normal speed with a very fair economy. Such arrangements could 

 be made in a few hours. 



Four years ago I presented my first paper on Electric Ship Propulsion to this 

 Society. A year before that I had designed an equipment for the battleship Wyo- 

 ming, and a proposal had been made to the Government in which my designs were 

 embodied. Since that time I have submitted several designs to the Government re- 

 lating to equipments of battleships which have been built. My last design applied 

 to a case like that of the Pennsylvania, and was submitted last spring. My estimates 

 as to the results of this equipment as compared with those which will be accom- 

 plished by the equipment which is being put into the battleship Pennsylvania are 

 shown by the following table: 



With reasonable allowances for steam required outside of the main turbines, 

 it would appear that this ship, which is provided with twelve boilers, could, with the 

 turbo-electric equipment, operate equally well with ten boilers. If two boilers 

 were omitted, the whole weight saving would be 266 tons. 



If my first design for a warship made over four years ago had been accepted 

 by the Navy Department, the vessel produced would have been very greatly supe- 

 rior in respect to economy, reliability, weight, simplicity, and cruising radius to 

 any ship now afloat, and ever since that time my case has been steadily strengthen- 

 ing through the great improvements which have been made in high-speed turbines. 



Since the Jupiter has been put in operation, much interest has been aroused 

 among shipowners and shipbuilders, and it is probable that equipments for sev- 



