Edit: I'm exploring an idea for a hypothetically possible form of propulsion for a sci-fi story. My question is if, based on what I describe below, other folks might have some ideas about how the construction and operation of such vehicles might work.
As some general scope to the question, this isn't describing any kind of warp drive or FTL. Rather, it proposes a what-if scenario where a gravity field/source can be produced artificially on demand in front of a spacecraft.
First, two assumptions. One, gravity has a particle (vs being a side effect of mass on space time. Lot of debate in the physics community around this but supported by the Standard Model). Two, a technology can be created to create gravitons on demand.
Ok, given that imagine a potential kind of reactionless spacecraft propulsion. A ship has a long projection in front of it. At the end of that projection is a gravity generator that produces a gravity well of some amount. Let’s say 1G for the example.
The idea is that such a ship could essentially produce a gravity well in front of it that it falls into. It doesn’t have to be a constant field. Maybe the generator alternates on/off to help move things along.
I have some ideas about the internals of such a craft could be configured. Like, each deck could be built so the floors always point to the front of the ship. To slow down, the ship rotates 180 degrees so the gravity field is now in the inverse direction of travel.
With the exception of the hypothetical gravity generator, I can imagine being able to build spacecraft like this using today's technology. Power sources might be solar, fission, RTG, etc.
What are some other considerations we'd have to make when designing craft like this?