| Abstrakt: |
A combat aircraft is stabilized by the parachute during its dangerous maneuvers such as spin, loss of speed (at low angles of incidence), vibration of the wings (at very high speeds). For the braking on landing of aircraft that have certain operational characteristics, recovery systems are used with the help of parachutes, in which the veil of the main parachute is cross, and the fabric is made of 100% para-aramid yarn. In order to meet the typical design criteria of such a decelerator assembly, related to: stability, operational safety, mass, volume, forward resistance coefficient, shock at opening, a special mechanical-textile processing technology must be used, for which it is it is necessary to intervene in the flow, especially when sewing - assembly by sewing. The paper presents the achievements of the specialists from INCDTP regarding the types of seams and the subassemblies used for the realization of the drag parachute veil. In order to assemble the para-aramid panels, coats thread brand para-aramid with continuous filament were used. In order to stabilize shape, it was used French seam double top stitch 2x301. Some rows of stitches have been used because the efficiency of the seams for thread and para-aramid materials is lower than those of thread and materials obtained by polyamide or polyester that are used to obtain deceleration systems for other aircraft, with a distinct configuration. The technique used to assemble fabric panels made of 100% para-aramid yarn with a length density of 220dtex/134f coincide with the field of use. [ABSTRACT FROM AUTHOR] |
