United States. Army Division of Military Aeronautics · leaf 15
is fabric is generally not sufficiently resistant or tight to be used for the construction of an observation balloon. It serves only for parts, such as the rudder, working relatively little and only retaining air. The fabric used for the observation balloon is a rubber-coated, 2- ply fabric. It… … fabric is obtained in the direction of the threads, but the fabric itself lacks homogeneity. On the other hand, when the threads are crossed, the maximum resistance is weaker, but more even, and does not allow a tear to spread easily in the fabric. The fabric with oblique threads is the only one in…
Balloons · Aeronautics, Military
Internet Archive · Smithsonian Libraries · Public domain (published before 1931). Free to use for anything.
![An illustration from [Balloon notes], 1917, leaf 15](https://img.insideoutlibrary.com/img/1024/ia-balloonnotes01unit-15-0.webp)
