Development and Testing of a Drogue Parachute System for X-37 Altv/B-52h Separation PDF
By:Stephen A. Whitmore,Nasa Technical Reports Server (Ntrs),Et Al
Published on 2013-08 by BiblioGov
Multiple scenarios were identified in which the X-37 approach and landing test vehicle (ALTV) catastrophically recontacts the B-52H carrier aircraft after separation. The most cost-effective recontact risk mitigation is the prelaunch deployment of a drogue parachute that is released after the X-37 ALTV has safely cleared the B-52H. After release, a fully-inflated drogue parachute takes 30 min to reach ground and results in a large footprint that excessively restricts the days available for flight. To reduce the footprint, a passive collapse mechanism consisting of an elastic reefing line attached to the parachute skirt was developed. At flight loads the elastic is stretched, allowing full parachute inflation. After release, drag loads drop dramatically and the elastic line contracts, reducing the frontal drag area. A 50 percent drag reduction results in an approximately 75 percent ground footprint reduction. Eleven individual parachute designs were evaluated at flight load dynamic pressures in the High Velocity Airflow System (HIVAS) at the Naval Air Warfare Center (NAWC), China Lake, California. Various options for the elastic reefing system were also evaluated at HIVAS. Two best parachute designs were selected from HIVAS to be carried forward to flight test. Detailed HIVAS test results are presented in this report.
This Book was ranked at 16 by Google Books for keyword Drogue.
Book ID of Development and Testing of a Drogue Parachute System for X-37 Altv/B-52h Separation's Books is TosLngEACAAJ, Book which was written byStephen A. Whitmore,Nasa Technical Reports Server (Ntrs),Et Alhave ETAG "lyjADl8MVqA"
Book which was published by BiblioGov since 2013-08 have ISBNs, ISBN 13 Code is 9781289291716 and ISBN 10 Code is 1289291713
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