EXPERIMENTS ON THE EULTON AND THE FROUDE. 



The principal dimensions of the Sotoyomo, the Manning, and the 

 Sonoma (a new ocean tow-boat for the Navy) are given for convenience in 

 the following table. The Manning is given because it is the prototype of 

 the Froude, and the Sonoma for comparison with the Manning, which has 

 characteristics not unlike an ocean tow-boat. Thus we have, in the Fulton 

 and the Froude, little tow-boats of the two principal types. 



*Salt water. 



tFresh water. 



The lines of the Manning and the Froude are given in the paper of last 

 year and need not be repeated here. The characteristics of the experimental 

 propellers are given here for convenient reference. 



PROPELLERS FOR THE FROUDE, 1911. 



No. I . . 

 No. lA. 

 No. iB. 

 No. 2 . . 

 No. 2A. 

 No. 2B. 

 No. 3 . . 

 No. 3A. 

 No. 3B. 



These propellers all had oval blades with sharp edges and were correctly 

 planed. 



The lines of the Fulton are given in Plate i ; they are substantially the 

 same as those of the Sotoyomo. The three experimental propellers had the 

 following characteristics. 



