An Inertial Density Field is used during periods of intense acceleration and deceleration to dynamically distribute the kinetic energy into each molecule within the field in a precisely controlled manner.
Consider this: One might be strapped into a seat. When accelerating, the force is transferred from the seat through the back and into the body. The kinetic energy has to pass through each molecule one at a time from the seat until it reaches every other part of the body, and the resulting elastic compression and expansion response ultimately determine the limits of living physiology to these forces. The IDF breaks this energy up into billions of little pieces, applying each to a molecule in the body at exactly the same time and thus avoiding the challenge of elasticity.
It is IDF tech that enables pilots to survive Angelfyre’s sustained acceleration factors of up to 600 m/s2. Put within a real-world context, Angelfyre can accelerate from 0 to 10 000 km/h in 4.6 seconds. Compare this to an Aston Martin DBS 2008, capable of 6.5 m/s2 (0 to 100 km/h in 4.3 seconds), or a modern-day fighter jet at around 12-15 m/s2. As an interesting side note, the fastest acceleration and deceleration a human has ever endured is 20 and 46.2 G’s respectively, both by Colonel John Paul Stapp on the Sonic Wind I rocket sled on December 10, 1954, a feat that nearly killed him.