Thanks Scott! Actually you un-confused things nicely, even if the guys were on tight rations as Sub culture said.
Between your info and Tom’s, and another look at Page 4 of the Booklet of General Plans, I think I finally have it figured out. Below is a clipped image of said Page 4. You can see that the conning tower is clearly marked. You can also see the gun access trunk, with hatches top and bottom, and the door is also visible, partially behind the trunk. Control mechanisms appear to exit the conning tower, and seemingly enter the gun trunk and proceed down to the control room. The image seems to confirm what wlambing posted about the trunk being solely designed for gun access, even if the plans are for SS381 (USS Sand Lance).
The image below shows two familiar images presented together. In Tom’s picture you can see the part of Tom D.’s picture shown in red. The flange, I assume, is where the control mechanisms would have exited the conning tower before either entering the gun trunk or paralleling it before going down to the control room.
[URL=http://s1352.photobucket.com/user/rdutnell/media/USS%20Batfish%20ACAD%20images/pix36_Page_01_zpsc1aa7ca0.jpg.html][IMG]http://i1352.photobucket.com/albums/q65 ... aa7ca0.jpg
Two more familiar pictures from Tom (one also posted by Scott) show the gun trunk sufficiently I think to redo the design. The trunk is cylindrical with two support gussets and what looks to be a circular steel rod attached to the underside of the upper gusset by a straight steel rod. The hatch too is cylindrical with a round hatch.
So here we go again...
I started the new trunk over the copied old one, starting with a vertical cylinder.
Next I prepared for the hatch, by drawing a circle on the correct alignment.
I then rotated the circle and extruded it into the old trunk.
At this point I decided to take advantage of the existing trunk, and did a union with it and the newly created hatch tube.
I then added the lower support gusset by drawing a circle and extruding it.
This gusset was then copied up to create the upper one.
I next prepared for the round rod that appears in the picture, drawing a small circle tangent to the larger circle.
This small circle was then extruded using the large circle as the path.
Next I added the support rod seen in the pictures.
I then added a couple of more that would be visible and blocked off the backside that won’t be visible.
At this point, I joined everything together and prepared to hollow it out…
…By subtracting the smaller diameter cylinder.
I then added the round feature on the front of the hatch and prepared to make the hatch hinges.
The image below shows the hatch hinge under construction. The arms have been extruded and the shaft has been added, and I’m preparing to make the ends which I made out of hexagons.
Here is the finished trunk…
…Which was then copied to the fairwater.
At this point I switched my attention to the conning tower, starting by copying the Page 4 clipping into AutoCad and scaling it, which I then first drew a cylinder on…
…Then added the ends and joined the 3 pieces into 1.
Next, I copied the completed conning tower to the fairwater model, using the forward edge of the fairwater as the reference point.
Obviously I don’t need the entire conning tower, so I used the shell command to create walls 1.125’ (3/32” at 1/144 scale) thick, and sliced off the parts I didn’t need, first slicing off the bottom at the deck level…
…Then slicing everything aft of where it entered the fairwater sides (due to them being unrealistically thick).
Next, I added the flange in the lower middle, the conduit for the control mechanisms, and a gusset.
I then joined everything except the conduit, because, I’m not sure that I should include it. What do you think? Yay or Nay?
I haven’t decided if I want to add the bracket seen at the top of the pictures of the conning tower through the door. It looks pretty good (though not perfect) the way it is, so I’m tempted to just leave it the way it is. I can always add it later if I change my mind, just as I can join the conduit if I decide to keep it.
Thanks again everybody for the input!