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July, 1925. through the switchboard to the main drive motor, with control switches so arranged that any generator may be taken out of the circuit. In ad- dition to supplying power for propul- sion, the generators may be operated at fixed voltage to supply power to the main cargo pump motors and for overboard use. Current from one exciter is used for field excitation of both the generators and main drive motor. A second exciter supplies power for operating all of the elec- trically driven engine room auxiliaries and deck machinery, while the third is held as a standby for either purpose. The ship is propelled by a 23800 horsepower 750 volt direct current double armature Westinghouse motor, direct connected to the propeller shaft through a Kingsbury thrust bearing. The motor is designed to develop full power at 100 revolutions per minute. The two armatures are independently wired so that either one may be op- erated without the other. Cooling is curried out by positive air circulation. The double armature drive motor pro- vides two units of power transmis- Progress of EPORTS from Gibbs Bros., Inc., R supervising the construction of the S. S. MALOoLo at Wm. Cramp & Sons shipyard show that progress on this vessel is consider- ably beyond scheduled expectations. The keel, as reported in the last is- sue of MARINE REVIEW, was laid on May 4. At the end of May over 751 tons of steel had been erected in place. Some of this work which is 75 per cent completed was not sched- uled to be ready until the latter part of July. The rapid progress made so far is due to the advanced work on the plans and the large accumula- tion of prepared material alongside, forged, punched and ready to be placed into position. Orders Placed Orders have already been placed for numerous parts and accessories to the main vessel. The Federal Steel Foundry, Chester, Pa., received the order for the stern post and for the stem of this vessel. The stern post has already been delivered and this single casting weighs over 39,000 pounds and contains 80 cubic feet of cast. steel. Bethlehem Steel Co. has received orders for the shaft and turbine forg- ings for the S. S. MALoLO. The shafts will be open hearth steel forgings, MARINE REVIEW sion, either one of which may be out of commission without hampering the operation of the other. A four-bladed propeller of the built-up type, with cast iron hub and bronze blades, designed by Dr. S. KE. Slocum has been fitted. It is 12 feet six inches in diameter, with vari- able pitch. For absolute and immediate control the diesel electric combination is ideal. As the vessel is maneuvered, the generators proceed undisturbed to produce power as it is required, with no danger of stalling or sticking on center. The pilot house control gives the pilot absolute command of all movement of the propeller, without any chance of delayed or mistaken signals. An added element of safety to the vessel is assured by the fact that full power is instantly avail- able for stopping, starting or revers- ing, whereas in the steam or direct diesel engine drive, the power de- livered to the propeller varies with the speed of the engine which must have time to pick up from its stopped position to full speed ahead or astern. 5. 5. Malolo with the American im accordance Bureau of Shipping and Lloyd’s re- quirements. In the order there are 2 propeller shafts, 1 spare propeller shaft, 10 line shafts, 2 couplings, 2 collars, 2 thrust shafts and 2 inter- mediate shafts. The total weight of all the shafting is 26 tons. The tur- bine forgings are of open hearth car- bon steel annealed, of 70,000 to 80,000 pounds tensile strength per square « inch with an elastic limit of not less than 50 per cent of the _ tensile strength. These forgings consist of 52 pieces and aggregate over 30 tons in weight. There will be 6 rotor forgings, 10 rotor wheel forgings, 4 rings and 24 coupling rings, 6 rotors and 4 end drives. Bethlehem thus has received a total order of 56 tons of shafting and turbine forg- ings for this big ship. An order for 7490 feet of monel metal for packing, shrouding and binding for the S. S. MALoLo has been awarded to the Whitehead Metal Products Co., Philadelphia. American Brass Co. has received the order for the blading material for the big steam turbines of the S. S. MALoLo. In this order is in- cluded 4035 feet of hard drawn brass blading material, 1860 feet of monel metal blading and 5600 feet of man- ganese copper blading. In addition 261. to this order the same firm will also supply 8290 feet of hard drawn brass packing material and dummy _ and grand strip material. Babcock & Wilcox has received the order for the 12 boilers as well as the oil burning equipment for the S. S. MALoLo. The boilers will have a total evaporating surface of 55,764 square feet and a _ total superheat- ing surface of 11,160 square feet. The working pressure is to be 280 pounds at 100 degrees Fahr. superheat. These boilers will be tested under hydro- static pressure of 560 pounds per square inch while still in the shop. There will be 6 burners for each boiler. The oil burners will be of the Cuyama design of the mechani- cal atomizing type working in con- junction with adjustable air regis- ters. A steam steering gear operating on 150 pounds steam pressure and capable of withstanding full boiler pressure of 280 pounds will be in- stalled. The gear will consists of a right and left hand screw connected to a cross head of 3 feet radius fastened to the rudder stock. The steering engine will be operated by a hydraulic telemotor controlled from the bridge. There will also be an electric control actuating the tele- motor ram in the steering engine room, fitted with a follow-up gear consisting of a Sperry-gyro pilot apparatus with stand which will op- erate the piston rod of the after hy- draulic ram through a rack and pin- ion extension driven by the gyro mo- tor connected by a clutch. In water tight subdivision the S. S. MALOLO will be at the very fore- front of best naval architectural prac- tice. The system of water tight doors in bulkheads is, therefore, of great importance. There will be 15 of these water tight doors in various. bulk- heads and they will be hydraulically operated by control from the bridge. Seven of these doors are to be of the vertical type and nine of the horizontal type and all to be oper- ated with the Stone Co. patent sys- tem of control. The order for these doors will also include supplying the necessary pumps and gears for hand operation as well as all copper pip- ing, bridge indicator gear, electrical and mechanical warning bells and all other equipment necessary to oper- ate the doors under control from the bridge of the ship. The Pendleton shipyards at Mystic, Conn., which years ago was one of the best known wood _ shipbuilding plants in this section, has been sold to Morris Levinson of Newburgh.