I’ve previously posted Deck B’s forward and miships section here, but I thought I’d take a stab at the largely mechanical centred ‘aft’ section, connected by the two doors on either side of the engine.
Most of the deck is taken up with the mechanics of the primary pulse drive, which can be seen on most of C Deck as well. On either side are some of the ship’s main systems as well as their back-ups, including (clockwise from bottom left) the gerstlers*, heat sinks, back-up power, Atmosphere plant or “Atmo” 1, waste processing, back-up algae & h20, Atmo 2, and Main Power. Jason described the ship as having lots of redundant systems so it could take a lot of damage and keep functioning.
I also suspect a lot of this ship is jury-rigged in order to function without a lot of crew, so hopefully we’ll only be heading back into these spots on occasional maintenance or if something goes wrong.
The staircases continue on from those below and eventually reach the Warthog launch platforms and then Hangars 2 and 3.
* I don’t know what gerstlers are, but Kaylee does. In ‘Bushwacked’, she says of the giant Alliance ships: “Six gerstlers crammed under every cooling drive so that you strain your primary artery function and you end up having to recycle secondary exhaust through a bypass system just so’s you don’t end up pumping it through the main atmofeed and asphyxiating the entire crew. Now that’s junk.”
So here’s all of ‘B’ deck together
I couldn’t resist adding a sub-section or undercarriage in order to fully flesh out the ship. This ‘deck’ is underneath the main Hangar, so Deck – 20 feet or so. (So D is lowest, then C1, 2, 3, then B, then A).
What landing gear there is is located here, but I recall Jason saying this ship doesn’t land too often, so this might be for emergencies only. A ship this size and mass would probably destabilize anything but a massively reinforced landing terminal anyway.
More service tunnels allow maintenance, and also access to the secret smuggling compartments located just off the bomb-bays. A few airlocks and more mine-launchers down here.
The rearmost lifts are the same as reach decks C1 and C2 for the warthog launch. This means that the warthogs can drive onto the lift and be moved down to C1 for servicing in the garage or to be loaded onto another ship in the main hangar, or can be lowered right down off the ship in the rare cases it lands. The other lifts can do this too, but aren’t big enough for vehicles, just personnel.
Final level of the Hangar Deck C(3), about 80ft above the main deck. At this level, most of deck C has ended into a network of service tunnels for the primary pulse drive and the ship’s many double-redundant mechanical functions, but the main part of Hangar 1 is still up there (on the right) and surrounded by a second set of catwalks.
The catwalks also provide access to the lower parts of Hangars 4 and 5, which are depicted on Deck B, along with the tops of the algae tanks and circular H20 tanks which are here visible as well.
On the prow are more gunning service rooms.
This part of the deck also features various airlocks, allowing for some docking and also service of the outside if Joe needs to climb into a spacesuit and head out onto the hull.
At the top right, you can see that one of the lifts makes a long semi-horizontal move in order to come to rest outside the main bridge on Deck B.
A firefly class ship is depicted for scale.
Hangar Deck C is so large I have 3 levels to depict. This is about 40ft above the deck and the edges are lined with catwalks.
Rear hangars 02 and 03 contain launch bays for our warthogs (jeeps) and mines, allowing the Medusa to launch them on the fly without landing. The whole massive bay doors don’t have to open for this.
Upper freight bays, the tops of the massive fuel tanks, and the missile loading system are included on this level, as well as more service bays at the prow for the guns.
At the front of the primary drive is a platform from which the bay can be surveyed and the winches and crane mechanisms controlled. A small Deck Chief’s office is located here as well.
Fuel tanks B2 and A2 are empty at the moment, but nearly double the Medusa‘s fuel capacity for ultra-longevity. Atmo thrusters have been moved to this level, which is the ship’s widest point.
Each square in these depictions if 40ft by 40ft. A firefly class ship would be about 5 squares long and 3 wide, meaning that at least two would fit in the main bay, and they could narrowly squeeze into Hangars 02 and 03. One could probably even squeeze in through Bomb-bay 01!
Lower Deck ‘C1’ of Medusa is dominated by a gigantic hangar bay, large enough to fit several firefly class ships.This is level 1 of 3, each about 40ft tall, making the total Hangar bay over 100ft (about ten stories or two fireflies)
Bay door 1 (right) is at the front of the ship and Bay Doors 2 (top left) and 3 (bottom left) flank the main drive at the back. Each entrance also features a set of bomb bay doors, with the largest being 01. Freight bays are forward of the Primary Drive and on other side of the hangar along with garages (1: forklifts; 2: hover craft; 3: empty; also useable for warthog maintenance), lifts & staircases, fuel tanks, and equipment lockers. Foredeck includes service tunnels for some of the main guns.
Three main pulse drives on the back have little service rooms. The atmo thrusters were moved up a deck at the ship’s widest point (it tapers out!).
The ship’s medusa-head patch has been painted onto the main bay doors.
Second draft of the Command Deck (B) of the freighter Medusa. The prow segment (right) contains hydroponics, med lab & surgery, primary bridge, holding cells, and tech lab/armoury on the outskirts. The inner sections include a map room, briefing room, weapons control, and training arena. Scattered are washrooms, lifts, stairwells, and some multi-purpose rooms.
The two segments are divided by the secondary bridge and Hangars 4 and 5, each of which have a shuttle bay and a lifepod bay (although the ship currently has only one shuttle).
The midships segment (left) are lower by about 20 feet, and crew can reach Main Engineering in a short time using the central funicular platforms (F1 and F2). On either side are the water and algae tanks (also accessible by stairway).
The stern segment is not pictured and is mostly mechanical (waste processing, power plants, etc) accessed by service tunnels.
Each square at this level is 20 feet by 20, thus this is less than half the size of the lower decks, but blown up. Main Engineering here lines up with the midships of Deck C3. As you can see from the superimposed firefly class in the bottom right, the walk from the main bridge to the secondary bridge is quite long.