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The Marine REVIEW Torpedo Boat Destroyer Zulu 5s aoe latest completed warship for the British navy is the torpedo boat de- stroyer Zulu, which has been built by Messrs. Hawthorn, Leslie & Co. of Hebburn-on-Tyne. The Zulu has just been commissioned for service after sat- ing ahead, in addition to two astern turbines. One cruising, together with one low pressure main ahead and one astern turbine is mounted on each wing shaft, whilst the high pressure main turbine is on the center shaft. At low May, 1919 six hours of an average speed of 33 knots, and that on the 24 hours' con- sumption trials, the vessel shall have q radius of action of 1,500 miles at q speed of not less than 13.5 knots per hour. The speed of 33 knots is an ex- ceptionally high one under any condi- tions, but with the stipulation that this Tue Latest BritisH Torpepo Boat DESTROYER isfactorily undergoing her official trials. She has a length of 280 ft. a beam of git, a draught of 8 ft. 10%4 in., and a displacement of 1,030 tons. She has Parsons turbines of 15,500 shaft horse- power, and there are three propellers. Steam is raised in six Yarrow boilers, burning oil fuel, of which 190 tons are carried. The armament comprises two 4-in. quick-firing guns, and two 18-in. torpedo tubes. The Parsons turbines of the Zulu have been built by Messrs. Hawthorn, Leslie & Co., to duplicate guages so as to ensure interchangeabil- ity with the other four sister vessels of the same class of destroyers. There are seven turbines developing roughly 15,000 I. H. P. when running at full speed, a high-pressure cruising, and intermediate cruising, a high pressure main, and two low pressure main turbines, all for go- pressure the sequence of steam is through the high pressure cruising to the intermediate pressure cruising, thence to the high pressure main, and to the low pressure main turbines. For inter- mediate speeds the high pressure turbine is cut out, the steam from the boiler entering the intermediate pressure cruis- ing turbine, thence going to the high pressure main turbine and to the low pressure main turbine. For full speeds both cruising turbines are out of action. The condensers are arranged in the wings of the ship and the circulating pumps at the forward end, the evaporat- ing of the distilling plant being also arranged in the wing on the forward engine room bulkhead room.. The con- ditions laid down by the British Ad- miralty in respect of these "ocean-going" destroyers require the maintenance for ZLeLu. speed should be maintained over a period of combined with heavy scantlings of hull and machinery, and six hours, with strictly limited consumption of fuel --its performance becomes a matter of no little complexity. : The Zulu, however, on her trials easily achieved 3314 knots in deep water, while the fuel consumption was well within The cruising trial of 24 hours duration was also carried the specified 'limit. through satisfactorily, the radius of ac- tion being fully 20 per cent over contract requirements. In the building of the Zulu, Messrs.. Hawthorn, Leslie & Co. have gone to dimensions which will make the vessel capable of also doing scout work.