I felt really interested in your Nation, Gowia, however, there are quite a few problems. You have way too many Dreadnoughts. Also, we do not do crew sizes like that of Star Trek, if you had used that as a reference. Size 8 would require about 10,000 crew members, more than likely a minimum of 7,000 to work every system in the ship to functionality. Dreadnoughts in this universe are supposed to be the behemoths father, so to speak. But you can call your Battleships Dreadnoughts, if you want. Carriers require a minimum of 7,000 for all decks period, if you want to launch fighters, otherwise 5,000 would work for maintaining the ship (You need fighter mechanics, support crew, pilots, etc for a full Carrier). Battleships around 4-5,000 max, 3,500 minimum. Cruisers and Frigates can range from 1-3,000 crew size. Now, you may be thinking, you have 5+ billion people on your planet, and that's all fine and dandy. But if you have more military than civilians, you'll be out of food by the end of the week, if not the day. Nation is all about management, and it can get tricky.

If you cleaned your NS up, fixed any errors, and made Parts the actual Spoilers (Yes, there will be several big images in peoples faces, but that's only if they open parts with large images, like I may have. It just makes things cleaner.) And fix your ship issue, the rest I believe is acceptable. Oh and, do remember. I'm not limiting you on what you can have. You can make frigates and cruisers with fighter and hangar bays if you wanted.

Edit:

As things can vary, (and size 5 can vary to just the Stratofortress itself or outward to the wings) 5-6 can range from 5-700 and on up to 1,500.

I didn't want to make the roleplay seriously limiting or complicated, just reasonable.