5 < 



r 



SLOT WELDS I INCH LONG ON 1.99 INCH CENTERS 

 STAGGERED IN ADJACENT FRAMES 



LA. 



0.242 



-1.247 



kA 



LA 



r 



242 ' 



t, 



DETAIL OF TYPICAL SANDWICH SECTION 



■-O.502*- 

 k i 



»0.503 *■ 



k AiL 



r 



'■^ 



DETAIL OF END SANDWICH SECTION 



Figure 3 - Details of Model OV-1 



Ail dimensions are in inches. 



psi were estimated for the original flat plating and as close as possible to 

 the regions of failure observed on the inner and outer shells of the model, 

 respectively. 



The webs of the sand'wich section were made of three equal segments 

 cut from the flat plating and butt-welded together to form complete cir- 

 cular rings. After the inner shell was rolled and welded, each web was 

 positioned and welded continuously to the inner shell. The outer shell was 

 slotted, rolled into a cylindrical form, and placed outside the web-and- 

 inner shell assembly. The outer shell was then plug-welded to the webs 

 at those points where the slots were cut. 



