| 摘要 |
<p>This invention relates to airships (10), with a volume in 15 to 60 million cubic feet of Helium. More particularly, it relates to improved structural envelope/gas bags (12) or outer covers for lighter-than-air and neutral buoyancy airships (10). In detail, the material (20) is a multi-layer cloth assembly including at least two plies of fiber cloth (62), said cloth (62) comprising 56 by 56 yarns/inch with a total weight of 150 to 450 g/m2, with the fiber of the individual cloth layers having a denier generally between 1 80 and 280 and with the fill of the individual plies at 90 degrees to each othe r. Preferably, the filaments should be between 200 and 215 denier. The fibers o f each layer of cloth (62) are selected from the group consisting of extended chain polyethylene polymer or a thermotropic liquid (melt spun) crystalline polymer. The extended chain polyethylene fiber is a woven modified rip stop weave architecture, while the thermotropic liquid (melt spun) crystalline polymer fiber is a 2x2 basket weave architecture.</p> |
