Developed Curve 

 on Centerline 



Developed Curve 

 on Chines 



x/b 



S'f/b 



x'/b 



y'/b 





 0.1175 

 0. 1722 

 0.2262 

 0.2798 

 03320 

 0.3837 

 0.4337 

 0,4817 

 0.5280 

 0.5719 

 06I37 

 0.6530 

 0.6898 

 0.7241 

 0.7560 

 07860 

 0.8139 

 0.8402 

 0.8655 





 0.0009 

 0002 1 

 00035 

 0.0054 

 00076 

 001 00 

 00135 

 0.0170 

 Q0209 

 Q0252 

 0.0299 

 0.0351 

 0.0406 

 Q0468 

 00536 

 0.0611 

 0.0695 

 0.0788 

 0.0894 







0.1484 

 0.1872 

 0.2257 

 0.2631 

 03002 

 03362 

 0.3706 

 0.4039 

 Q4354 

 0.4654 

 0.4936 

 0.3200 

 0.5447 

 Q5675 

 Q589I 

 Q609I 

 06279 

 0.6461 



Q5082 



0.5082 



05104 



0.5118 



05134 



0.5151 



0.5176 



0.5200 



0.5229 



0.5260 



0.5294 



0.5331 



0.5371 



0.5415 



0.5464 



0,5517 



0.5578 



0.5645 



0.5721 



Figure 3 - Diagram of Developed Top Surface Showing Layout 

 for Construction of a Hollow Metal Float 



in Figure 4, This float was used 

 in the catenary-sweep application 

 and represents the size and type 

 used in the experiments described 

 in this report . 



The double tail fins are 

 provided for directional stability, 

 while the equiangular bridle, shown 

 in Figure 2, is provided to maintain 

 pitching stability. The function of 

 the bridle is to permit stable tow- 

 ing when submerged as well as on 

 the surface. The action of the 

 bridle is illustrated by the follow- 

 ing excerpt from Reference (2): 



; 



\ 



TMB i 1854 



Figure U - TMB Planing Float 



This float is of hollow sheet-metal construction, 

 prestressed by internal air pressure. The pipe 

 cap at the stern protects a check valve through 

 which the internal pressure is applied. The lift- 

 ing bail is shown on the top of the float. 



"When the float is towed by the bridle on the surface, both 

 legs function when the float is carrying very large loads on the 

 (tow) line. When the float is planing or carrying small loads, 

 the forward leg is slack; the after leg carries the entire load. 

 When the float is towed submerged, the line of action of the tow- 

 line at the apex of the bridle passes between the two legs, so 

 that the effective point of attachment of the cable is moved for- 

 ward of the rear leg. The float stalls If towed with a single 

 line to the after bridle point of attachment . . . The equiangular 

 bridle was selected as giving good performance both on the sur- 

 face and completely submerged. 



To meet the requirements of both weight and buoyancy It was neces- 

 sary to use all-steel construction for the catenary-sweep application. Thus, 

 unlike previous floats of this type which were made solid of white pine, the 



