Accession Number : AD0439809


Title :   DART STABILIZATION SYSTEM. (DIRECTIONAL AUTOMATIC REALIGNMENT OF TRAJECTORY) USING THE SLIP LINE


Descriptive Note : Technical Report


Corporate Author : STENCEL AERO ENGINEERING CORP ARDEN NC Asheville United States


Full Text : https://apps.dtic.mil/dtic/tr/fulltext/u2/439809.pdf


Report Date : 05 Apr 1963


Pagination or Media Count : 26


Abstract : The slip line system stabilizes the ejection seat during rocket burning and corrects the trajectory. It incorporates a brake, a bridle on the bottom of the seat and line to be pulled through the brake after the seat has traveled a short distance. As long as the seat does not turn past the design angle during slip line action, the seat is corrected for all misalignments in both directions in proportion to the offset. This report covers the development of a brake, the construction of a computer to find the brake pull time and length of pull, and the seat testing to optimize the corrections and test the system effectiveness. Two preliminary tests were made with the slip line which was designed for a 1-inch maximum misalignment. These tests resulted in a maximum of 13 percent under-correction, with 1-inch misalignment. After adjustments two further tests gave about 7 percent under-correction. A test with 1.4-inch misalignment resulted in approximately 12 percent under-correction. These errors in correction of seat turning rate can be easily taken care of with drogues smaller than the large drogures in use at present.


Descriptors :   Ejection Seats , Misalignment , Rotation , Drogue Parachutes , Mechanical Cables


Distribution Statement : APPROVED FOR PUBLIC RELEASE