1:48 Engine Room #3 Battleship USS New Jersey for Permanent Display on Board.

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Thanks guys!
I got the aux air ejectors designed, but they're kind of fictional. I have no drawings of them nor do images help very much. Here's an image that "shows" the two aux air ejectors that produce vacuum for the turbo-generators. Can you see an air ejector hiding in that piping? I can't. Therefore; I just shrunk the main ejector until it made a resonable size. Anyone visiting the engine rooms probably won't see much of them either. They are on the right side of the image.

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I have the foundation drawings for the aux units. They are brackets that attach to the bulkhead wall with stiffening on the fire room #4 side. I drew them sort of correctly, albeit simpilified. That said, I don't have any drawing of the units themselves or the foundation of the main air ejctor. If it goes straight down to the 3rd skin like some of the heavier gear does, it won't work becasue they would pass through the end bell of the main condenser. I chose to bracket it also.

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Here are the two unpiped aux air ejectors. They are fatter than the real ones.

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I'm running into a jam trying to get the clear acrylic bulkheads laser cut within a budget I can tolerate. I'm donating this model like the other two, and spending the best part of a year in its creation. As a result, I'm trying to mitigate out-of-pocket expenses as much as I can. That leads us to plan B; back to hand-cut styrene sheet. I've already bought the sheets for this eventuality and will make the end bulkheads and all the under-floor framing out of styrene. Styrene is much easier to glue togther (silver lining).

I'm calling this approach, "the Swiss Cheese cutaway method". The stiffeners on the fire room sides will add structural integrity to make the bulkheds work. There would be part of the boiler supports on the other side. Stiffeners are mentioned on the plans.

Here's the fore bulkhead:
Fore Bulkhead Design.png


And the aft bulkhead. It's important that they support the propshaft pass thrus. The tongue sticking up is supporting the entry ladder. I think I'm going to make a bit of ceiling there to model the entry hatch into the engine room. It's an important feature. There's also a small hatch in the fore bulkhead to enter the #3 fire room.

Aft Bulkhead Design.png


I printed out full-size plans for all the styrene parts in prep to handcut them. I'm still waiting for another quote for laser cutting acrylic, but I'm not very optimistic about the outcome. I still have to design the control panels and electrical cabinets. After that paint and assembly will begin.
 
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I've piped the aux air ejectors. This is not prototypical, but it's reasonably functional. This is just the primary lines. I'm not attempting to include any secondary lines. I may attempt to print this as a complete assembly… would help in alignment. Ryan gave his approval on the "Swiss Cheese" approach. I will have a lot of styrene cutting to do.

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