An analysis of an inelastic ACLS plunge mode dynamic model is presented. The ACLS has unrestrained side elements and frozen and elements. The model exhibits unstable behavior at certain operating conditions for which the side elements are in contact with the ground. A linear analysis showed this instability to be due mainly to the altitude sensitivities of the cushion to atmosphere airflows and the attendant influence on the dynamic pressure forces on the vehicle. The model instability can be alleviated by isolating side and end elements so that they are all unrestrained and by simultaneously venting the air cushion directly to atmosphere. (Jensen)
Air cushion landing system stability study
Studie ueber die Stabilitaet beim Landen eines Luftkissenfahrzeugs
US Government Reports ; Feb ; 1-65
1981
65 Seiten
Report
Englisch
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