ACTIVE TYPE OF STABILIZING GYRO. 217 



Associates. 



Newman Page, Draughtsman in Charge, Mechanical Department, Electric 

 Boat Co., Groton, Conn. 



John Winslow, Chief Progress Man, Inspection Department, Navy Yard, 

 New York, N. Y. 



Stevenson Peirce Taylor, 123 West 85th Street, New York, N. Y. 



Juniors. 



Joseph J. Kam, Draughtsman, Electric Boat Co., Groton, Conn. 

 Albert Hoersch, Hull Draughtsman, Electric Boat Co., Groton, Conn. 

 Walter D. Allen, Computer, Electric Boat Co., Groton, Conn. 

 Revere B. Pulsifer, Assistant in Naval Architecture, Massachusetts Institute 

 of Technology, Boston, Mass. 



The President: — You have heard the elections approved by the Council. 

 Those in favor of adopting the report will say Aye; opposed. No. Unanimously 

 carried, and the gentlemen are hereby declared elected — Mr. Robinson a member 

 of the Council, and the others in their respective grades. 



DISCUSSION. 



The President: — The next thing in order is the discussion on the paper 

 entitled "Active Type of StabiUzing Gyro," by Mr. Elmer A. Sperry. Is there 

 any discussion on that paper? 



Mr. Rudolf Blohm, Visitor: — If I ask your kind permission to say a few words 

 on the paper of Mr. Sperry, I must at the same time apologize for not being able 

 to deal with some of the points as thoroughly as I should like. I had no oppor- 

 tunity to study the paper before it was read, so I am able to speak on that part 

 of the paper only which Mr. Sperry read in his abbreviated extract ; and not having 

 had time to collect the necessary data, I shall not now attempt to compare the 

 different devices for damping the rolling movements of a ship, as to effectiveness, 

 weights, spaces occupied, and so on. The object of my speaking is to call your 

 attention to some facts mentioned by Mr. Sperry concerning the theory of rolling. 



Dealing with the question of primary resonance between waves and ship, 

 Mr. Sperry said: — "There is no such thing as resonance between waves and ship," 

 and from this statement draws the conclusion that any anti-rolling device, relying 

 for its effectiveness on the existence of secondary and artificial resonance, will not 



