A Coil System for an Air-cored Betatron

The Physiology of High‐speed Flight: PART II

“…British work on this problem clarified the dynamic response of the human body to the sudden force of ejection and indicated the safe maxima of peak acceleration and jolt. The figures currently accepted in this country are a maximum thrust not exceeding 25 g and a maximum rate of onset of acceleration of 300 g per second, applied to the seat (Latham, 1955, 1957). The elastic characteristics of the ejection seat cushion (in which the man's dinghy and survival equipment are stowed) were also found to be critical in seat‐ejection.…”

“…Human studies on vibrating platforms show that several body resonances producing discomfort and fatigue occur in the frequency range 3 to 30 c/s. For example, a resonant oscillation of the shoulder girdle is excited at 4 to 5 c/s and epigastric discomfort has been reported at 8 to 10 c/s (Latham, 1957). Mechanical vibration of sufficient intensity at frequencies above 16 c/s produces blurring of vision which, at higher frequencies (60 to 90 c/s), was attributed by Coermann (1940) to a forced resonance of the eyeball within the orbit.…”