202 ACTIVE TYPE OF STABII<IZING GYRO. 



to be given to the world, the important subject of stabilizing ships will 

 receive by far its most interesting chapter and not unlikely its most important 

 contribution. 



The advantages to be derived by efficiently stabilizing ships may be 

 summarized as follows: — 



I. ADVANTAGES COMMON TO ALL SEAGOING SHIPS. 



(c) Saving in power and consequent saving in fuel owing to the ability 

 to maintain the shortest course between two points in bad weather, inasmuch 

 as the ship will be in no danger from excessive rolling when steaming even in 

 the trough of the sea. 



(b) Saving in power and consequent saving in fuel owing to the fact 

 that the wetted surface is not increased by wallowing, inasmuch as the vessel 

 is always held on an even keel. 



(c) Saving in power and consequent saving in fuel by elimination of 

 rolling against the relatively stiff water when under way. This increase in 

 the power required to drive a vessel which is rolling is due to what is known as 

 the keel or form line impingent. It is illustrated by the far shorter extinc- 

 tion curve of the roll of the vessel when steaming than when not under way. 



(d) Saving in power and consequent saving in fuel by reducing the 

 yawing and tendency to follow a sinuous course. 



(c) Saving in fuel and weight by the elimination of bilge keels. 



(/) Making small ships as comfortable for passengers as large ships, 

 while at the same time being able to prevent the largest from rolling. 



(g) Eliminating stresses in the structure of the ship and the stresses in 

 the accessories and auxiliaries contained within the ship, which are caused 

 by excessive rolling. 



(h) Preventing deterioration in cargo caused by excessive rolling. This 

 would particularly apply to ships carrying live stock as cargo. 



(i) Ability to roll the ship artificially for the purpose of freeing from or 

 rolling off sand or mud banks by opening the contacting crevices and gradu- 

 ally liquifying the encumbent mass. 



(j) Making a ship more seaworthy by preventing the shipping of seas 

 due to rolling. 



(k) Vastly increasing the efficiency, certainty and range of usefulness of 

 ice breakers; in fact opening up a whole new field of operations for this 

 important class of ship. 



