Technology and Operations
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Pressure Hull Construction - Type IXC/40
Posted by:
Scott
()
Date: November 27, 2002 10:07PM
I am sorry about not being able to finish my posting but I was called out of town, so now Iwill finish. Please forgive.
Foundations
Foundations for the main machinery are fabricated structures, the inboard elements of which extend the full length of the machinery compartment including the maneuvering room. The outboard elements are not interconnected longitudinally. Vertical members run 12 to 14mm (.47" to .55") laterally braced at each frame. Sole pieces for the main engine are 24mm (.94") and for the motors and thrust bearing are 20mm (.79").
Foundations for auxiliaries present nothing of note except for matter which is discussed under sound isolation.
Foundations for guns are undeserving of comment except to mention that the foundation for the 105mm deck gun, forward of the conning tower, incorporates a heavy cast ring for the mounting bolts.
The hull structure presents little of interest. The employment of castings for bulkheads and for the top of the conning tower is noval, but is an expensive way to obtain the desired strength. The tremendous masses of weld metal employed in welding the castings to the plating are of debatable merit.
Further, in transferring the basic design to the completed vessel, it appears that weaknesses have been introduced. Compensation for hull openings does not appear adquate in all cases, and is particularly bad in the way of the machinery patch, where any load on the frames must be transferred through rivets in shear. The lack od means for adjustment of the strongbacks in the way of the torpedo hatches is also undersirable in the regard.
The drawbacks to acupper pipes led through tanks are too well known to require comment. It is curious that they should have been retained, as the lightness of tankage plating and framing makes them very susoeptible to damage.
Whiloe workmenship was in general good, details were not in all cases satisfactory. Gross pitting of welds of foundations to hull was noted in certain cases, and pipe and cable hangers were apparently located without regard to surroundings, as witness the welding of hangers to rivets, caulked edges of rivets and plates, and to foundation bolts.
Conclusions is that the hull is , as a complete entity, believed to be inferior to contemporary U.S. Naval construction.
This is it for the part on hull consturction. I hope this helps in some way to explan the hull of the Type IXC/40 subs.
Scott
Foundations
Foundations for the main machinery are fabricated structures, the inboard elements of which extend the full length of the machinery compartment including the maneuvering room. The outboard elements are not interconnected longitudinally. Vertical members run 12 to 14mm (.47" to .55") laterally braced at each frame. Sole pieces for the main engine are 24mm (.94") and for the motors and thrust bearing are 20mm (.79").
Foundations for auxiliaries present nothing of note except for matter which is discussed under sound isolation.
Foundations for guns are undeserving of comment except to mention that the foundation for the 105mm deck gun, forward of the conning tower, incorporates a heavy cast ring for the mounting bolts.
The hull structure presents little of interest. The employment of castings for bulkheads and for the top of the conning tower is noval, but is an expensive way to obtain the desired strength. The tremendous masses of weld metal employed in welding the castings to the plating are of debatable merit.
Further, in transferring the basic design to the completed vessel, it appears that weaknesses have been introduced. Compensation for hull openings does not appear adquate in all cases, and is particularly bad in the way of the machinery patch, where any load on the frames must be transferred through rivets in shear. The lack od means for adjustment of the strongbacks in the way of the torpedo hatches is also undersirable in the regard.
The drawbacks to acupper pipes led through tanks are too well known to require comment. It is curious that they should have been retained, as the lightness of tankage plating and framing makes them very susoeptible to damage.
Whiloe workmenship was in general good, details were not in all cases satisfactory. Gross pitting of welds of foundations to hull was noted in certain cases, and pipe and cable hangers were apparently located without regard to surroundings, as witness the welding of hangers to rivets, caulked edges of rivets and plates, and to foundation bolts.
Conclusions is that the hull is , as a complete entity, believed to be inferior to contemporary U.S. Naval construction.
This is it for the part on hull consturction. I hope this helps in some way to explan the hull of the Type IXC/40 subs.
Scott
| Subject | Written By | Posted |
|---|---|---|
Pressure Hull Construction - Type IXC/40
|
Scott | 11/27/2002 10:07PM |
|
Re: Pressure Hull Construction - Type IXC/40
|
Rainer Bruns | 11/27/2002 11:12PM |
|
Re: Pressure Hull Construction - Type IXC/40
|
Scott | 11/28/2002 02:49AM |