Apparatus for repositioning aircraft ejection seat during the ejection sequence and method

摘要

Apparatus and method for repositioning an aircraft ejection seat (10) during an ejection sequence from a semi-reclined position (FIG. 1) to a more upright position (FIG. 2) for safer ejection. The seat (10) is supported in the aircraft by inner catapult cylinders (18, 20) slidably engaged in outer catapult cylinders (14, 16), collapsible truss links (54, 56), connected to the seat at one end and having their other ends connected to slipper blocks (68) slidably engaged on the outer catapults (14, 16). The collapsible truss links hold the seat away from the lower ends of the catapults and firmly in a semi-reclined position during normal operation. There are triangular trusses comprised of seat structure (10), the catapults (14, 16, 18, 20), stops (70) on lower ends of the outer catapult cylinders (14, 16) and the compression links (56). The slipper block (68) are restrained by the down stops (70) and the compression links (56). The seat is prevented from moving forwardly by tension in telescoping collapsible links (54) and by maintaining a fixed length relationship between the telescoping links (54) and the compression links (56) while keeping the inner and outer catapults (14, 16, 18, 20) at a fixed length to form single links by means of internal catapult locks (88).