The shutter was made of thin stainless steel which was light and durable enough to withstand the high acceleration forces of this fast shutter.

Gravity and acceleration forces push the passenger in opposite directions with nearly equal force, creating a sensation of weightlessness.

Mechanical stimulation generates acceleration forces acting on the body.

Acceleration forces on the pilot would be severe in such a maneuver.

With the development of higher speed monoplane fighters in the late 1930s, acceleration forces during combat became more severe.