I did not read the entire thread, but I would like to offer a simpler solution to simulating G-Force.
First, I'd like to mention that both the Oculus Rift and Vive provide a high quality and equally important convenient way to experience Virtual Reality. The main problem with a lot of new technology is not that we don't know how to make it, but we don't know how to simplify it, or miniaturize it for home use. I really like these simulation seats, but they're not for the average consumer - but the average Virtual Reality consumer would like to experience real G-Force.
I am no professional when it comes to mechanics or physics, but if G Force is simply the act of experiencing an increase of weight (or to be more precise - pressure) on the body, then could we not just design a full body suit with deflated airbags at important pressure points on the body, (chest, thighs, shoulders, etc), and when you accelerate at a given speed, a pre-determined setting will inflate the bags at a certain speed to simulate not just the pressure, but the force (movement) against your chest, then as your body would reach terminal velocity in real life, the bags deflate accordingly to simulate that velocity change.
Obviously the suit will need to be connected to an oxygen tank, and obviously that tank will need to refill itself. I don't know how much "usage" you would get out of a small tank for home use, I also don't know if tanks can refill themselves using the oxygen around them or how long it takes. Also it's important the bags can't deflate too rapidly and that valves on the suit are connected to allow manual release just in case.
But please correct me!
