G, or Gee, meaning "Earth Gravity",is a standard measure of planetary gravity fields or acceleration in space combat. In either case,one "G" equals the acceleration or pull of the gravity field on Old Earth, which is about 10 meters per second squared (32 feet per second squared). Normal humans can stand brief periods of between 6 and 9 G’s before they become unable to breathe and pass out. Supernatural humans such as werecreatures, vampires, or ghouls can stand substantially more. For prolonged periods of time, humans cannot tolerate above about 2 or 3 G’s, or less than about half a G, before serious physiological effects occur. In low or zero gravities, humans lose muscle tone and bone density, while in high gravities, the spine contracts and can pinch nerves and cause pain or paralysis. Modern drugs (such as grav pills) and frequent exercise can greatly reduce the physiological changes due to low gravity, but worlds with more than two Earth gravities will rarely be colonized by humans unless the terraforming process can reduce the planetary gravity field.
Acceleration Limits in the TI Universe:Edit
- Shuttles: 2-3 G's sustained, 6 G's in spurts, thanks to the limits of human biology.
- Zero-G ships: (vessels without artificial gravity): 2-3 G's sustained, 6 G's in spurts, same reasons as shuttes.
- Fighters: 10 G's, thanks to acceleration frames and very limited inertial dampers.
- Artificial Gravity Ships (wihout gravity drives): 20-30 G's due to inertial dampers making it feel like 2-3 G's.
- Gravity Drive Ships: up to 100 G's thanks to the ability to apply accelleration evenly to the whole ship and its contents all at once with a gravitic field. Above that limit, it's hard to make the field even, and tidal effects start to become difficult to compensate for.