Firefly Tech: Series 1 Ships & Grav Dampeners

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Firefly Tech: Series 1 Ships & Grav Dampeners

Postby Whitney » Wed Mar 26, 2014 11:29 am

Reposted from ... ech-notes/

Let’s start with the Series 1 Firefly:

The Series 1 was, of course, the first Firefly and was about two-thirds the size of the Series 3. It was created by the Allied Spacecraft Corporation (ASC) on Osiris and outfitted by The Firefly Ship Works on Hera – same outfitter that did the build out on Serenity. ASC started making the Series 1 to support settlers moving to the Border and Rim. It was designed to be reliable and inexpensive to operate.

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A side-by-side comparison of the Series 1 & 3 Firefly, taken from The Atlas of The Verse.

The first Series 1 Fireflys start rolling off the assembly line in 2435 and continued to be made through 2458. A total of 8,000 were built over the lifetime of the model. This compares to the Series 3, which started manufacture in 2459 and had lifetime sales of over 28,000.

On to the grav dampeners:

Grav dampeners are essentially smaller versions of the components of the big grav rotor that goes around the outside of a Firefly’s rear section. Dampeners are usually mounted underneath the lowest deck in each part of the ship and generate a gravity “envelope”, both above and below that deck. The shape of the envelope is like a figure eight, with the intersection of the figure eight at the center of the dampener’s gravity rotor.

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An example of the “figure eight” gravity envelope generated by the grav dampeners.

Typically, the envelop is much larger above the deck than below, and it’s size and shape can be altered using the dampener’s control assembly. Under normal operation, the figure eight has a huge top loop and a tiny lower loop. This has the effect of reversing gravity when you enter the crawlspace where the dampeners operate. So, the underside of the deck above is your “floor” when you’re in the crawlspace. And “up” is actually out the bottom of the ship.

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The juxatposition of the two gravity envelopes – and how they effect people above and below deck.

So, what does a gravity dampener look like? Imagine a big front-loading washing machine laying on it’s back. The dampener is rectangular, with the rotor at the top and the control assembly at the bottom. Dampeners are laid out in series, like cars on a train. They’re approximately 4′ wide x 7′ long x 3′ high.

That big grav rotor that generates the gravity envelop around the outside of the ship is also constructed of a train of dampeners that form a ring instead of a line (the “teeth” in the grav rotor). The difference in their function is more a matter of software than hardware – the grav rotor is programmed to generate a gravity envelop around the ship that renders it both buoyant and inertial-less, so that’s what it does. The mini-rotors under the deck are programmed to keep the crew from floating away, so that’s what they do.

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A grav dampener “train”, seen from overhead.

If you lift open the metal shielding at the bottom of the dampener – the end with the control assembly – there is short, fat rod with copper rings around it inserted in the middle of a big metal clamp. This is the heart of the grav dampener. It’s the Theory of Everything, Grand Unification magic cylinder that makes the negation or generation of gravity a reality. It’s called The Honnecourt Capacitor in honor of Villard de Honnecourt, who first described the idea of a machine that could produce more energy than it consumes. (Note: It was Jane’s idea to call the Honnecourt Capacitors “Honeys” for short.)

The Honnecourt Capacitor does this trick by using Weak Force physics to compress tiny bits of space, which in turn generates electromagnetic radiation. Because Weak Force compression requires only tiny amounts of energy to operate, most of the energy surplus can be transferred to the gravity rotor, which in turn spools that energy. This cycle repeats until sufficient energy has been spooled to generate a controlled gravity envelope.

Once a grav rotor is spun up, it can generate gravity almost indefinitely, without the application of any additional external power (this is why in Out of Gas Mal wasn’t floating around the ship). However, if you were to pull the Honnecourt Capacitor, the gravity envelop would quickly collapse.

In most ships, the Honeys used for generating internal gravity are different than the ones used in the drive system. But because Fireflys use standardized parts where ever possible, the Honeys under the deck and in the grav rotor are physically identical (although it would take a savvy mechanic to transplant them and make them work, as the programming is very different).

Other helpful notes on the Series 1:

The reactor core of the ship is in the dead center and rear, heavily shielded and all-but-inaccessible. However, there is maintenance access under the deck plates pretty much throughout the entire ship.

Remember, the grav rotor negates all of a ship’s gravity, including internal gravity, in order to make it “inertial-less”. The grav dampener array under the deck plating is required to compensate for this effect and establish roughly 1G of gravity inside the ship. Operating internal gravity does not in any way effect the external gravity-negating envelope, as that outer envelope completely encompasses the internal ones.
Captain Cooper
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