[X] Command Configuration (Mass: 140kt) [Cost: 27.5]
Before you move on to the rest of the spaceframe, you have an important decision to make regarding the key systems. The days of the old linear cores that just need an open horizontal run are over, and space is much more limited vertically. As a result the size of warp core will affect the possible hull types for the engineering section, and while the 'standard' neck and secondary hull design will always be available, two of your options open up their own associated form factor as an additional choice for you to potentially select.
The smallest possible warp core sacrifices injector control for a reduced footprint of only four decks. As the antimatter stream is less compressed by the successive magnetic rings found in larger designs, the safe threshold for quantitative throughput is substantially reduced and the corresponding power output is lowered. Absent improvements in base sprint efficiency, the ship will be limited to Warp 7.4, or 80% of the maximum speed of a standard core, though cruise is unaffected. However the reduced footprint means that an inline hull then becomes possible, and with it a parallel nacelle configuration that will provide minor boosts to both cruise and maximum speeds.
Alternatively a standard warp core will avoid any inherent design tradeoffs, although an inline secondary hull becomes impossible as a result. With a minimum of seven decks attached an integrated ventral hull configuration becomes possible, although at a larger scale than any designed before. If chosen an integrated hull would make the spaceframe more compact, providing an increase in hull durability. Small consolation, but it might count when shields fail and the ship is directly exposed.
Finally there is a large warp core, spanning eleven decks and providing an incredibly fine antimatter stream feed into the main reaction chamber. The increased control will improve efficiency, completely eliminating the 'stray' antimatter problem that requires smaller cores to be saturated with a control gas to prevent any undesired interactions with the internal systems of the reactor. With higher temperatures in reach as a result of not needing continually introduce a cooler moderator, the nacelles could nearly be pushed to the maximum cruise at an efficient level. But this would necessitate a deep neck to accommodate the greater length of the core.
[ ] Small Warp Core (4 Deck) [Cost: 31.5] (Maximum Warp: 8 -> 7.4)
[ ] Standard Warp Core (7 Deck) [Cost 35.5]
[ ] Large Warp Core (11 Deck) [Cost: 39.5] (Efficient Cruise: 6 -> 6.8)
Two Hour Moratorium, Please