Airship technology

Hydrogen is a chemical element; it has the symbolH and atomic number1. It is the lightest and most abundant chemical element in the universe, constituting about 75% of all normal matter. Under standard conditions, hydrogen is a gas of diatomic molecules with the formula, called dihydrogen, or sometimes hydrogen gas, molecular hydrogen, or simply hydrogen. Dihydrogen is colorless, odorless, non-toxic, and highly combustible. Stars, including the Sun, mainly consist of hydrogen in a plasma state, while on Earth, hydrogen is found as the gas (dihydrogen) and in molecules, such as in water and org

Helium (from ) is a chemical element; it has symbol He and atomic number 2. It is a colorless, odorless, non-toxic, inert, monatomic gas and the first in the noble gas group in the periodic table. Its boiling point is the lowest among all the elements, and it does not have a melting point at standard pressures. It is the second-lightest and second-most abundant element in the observable universe, after hydrogen. It is present at about 24% of the total elemental mass, which is more than 12 times the mass of all the heavier elements combined. Its abundance is similar to this in both the Sun and

unpowered aerostat

thumb|Ester group (blue) which defines polyesters. This diagram shows just one ester linkage per repeat unit. Polyester is a category of polymers that contain one or two ester linkages in every repeat unit of their main chain. As a specific material, it most commonly refers to a type called polyethylene terephthalate (PET). Polyesters include some naturally occurring chemicals, such as those found in plants and insects. Natural polyesters and a few synthetic ones are biodegradable, but most synthetic polyesters are not. Synthetic polyesters are used extensively in clothing.

lighter than air aircraft consisting of a bag, called an envelope, which contains heated air

thumb|Truss bridge for a single-track railway, converted to pedestrian use and pipeline support. In this example the truss is a group of triangular units supporting the bridge. thumb|Typical detail of a steel truss, which is considered as a revolute joint thumb|Historical detail of a steel truss with an actual revolute joint A truss is an assembly of members such as beams, connected by nodes, that creates a rigid structure.

thumb|right|Spools of aramid yarn destined for body armor thumb|right|Fiberglass–aramid hybrid cloth Aramid, or aromatic polyamide fibers are a class of strong, heat-resistant, synthetic fibers, commonly used in aerospace and military applications - e.g., ballistic-rated body armor fabric and ballistic composites, marine cordage and hull reinforcement - as a substitute for asbestos, and in lightweight consumer items, such as phone cases and tennis rackets.

thumb|upright=1.14|Deperdussin Monocoque, with wooden shell construction

thumb|Simulated flight (using image stack created by Industrial CT scanning|μCT scanning) through the length of a knitting needle that consists of laminated wooden layers: the layers can be differentiated by the change of direction of the wood's vessels thumb|Shattered windshield lamination keeps shards in place thumb|Laminate flooring thumb|A flexible thin-film solar cell for aerospace use (2007)

polymer

artificial illuminating gas similar to propane

thumb|170px|The air-filled red balloon acts as a simple ballonet inside the outer balloon, which is filled with lifting gas. A ballonet is an inflatable bag inside the outer envelope of an airship which, when inflated, reduces the volume available for the lifting gas, making it more dense. Because air is also denser than the lifting gas, inflating the ballonet reduces the overall lift, while deflating it increases lift. In this way, the ballonet can be used to adjust the lift as required.

large building used for sheltering airships

gas used to create buoyancy in a balloon or aerostat

processed outer membrane of the intestine of an animal

airship docking structure

hypothetical type of airship that contains a vacuum rather than a lighter-than-air gas

spy Construct used for undetected Zeppeline-observations