Some Typical g-Forces

1 g      Standing

1.2 g   Normal elevator acceleration (up).

1.5-2g Walking down stairs.

2-3 g  Hopping down stairs.

1.5 g   Commercial airliner during takeoff run.

2 g     Commercial airliner at rotation

3.5 g  Maximum acceleration in amusement park rides (design guidelines).

4 g     Indy cars in the second turn at Disney World (side and down force).

4+ g   Carrier based aircraft launch.

10 g    Threshold for blackout during violent maneuvers in high performance aircraft.   Vertical bank in F-16 for example.

10 g   The NASA g-force simulator is limited to 10 g for astronaut training.

11 g    Alan Shepard in his historic sub orbital Mercury flight experience a maximum force of 11 g.  During this time he was unable to speak because he could not move his jaw.

20 g   The Colonel Stapp experiments on acceleration in rocket sleds indicated that in the 10 to 20 g range there was the possibility of injury because of organs moving inside the body.  Beyond 20 g they concluded that there was the potential for death due to internal  injuries.  Their experiments were limited to 20 g.

30 g   The design maximum for sleds used to test dummies with commercial restraint and air bag systems is 30 g.