Abstract: A power-generating laminate for an airship comprises a base fabric layer, a barrier layer disposed upon the fabric layer, an inner metal film layer disposed upon the barrier layer, a piezoelectric/pyroelectric layer disposed upon the inner metal layer, an outer metal layer disposed upon the piezoelectric/pyroelectric layer, and a cover layer disposed upon the outer metal layer. The power-generating laminate forms a gas-impervious envelope to maintain lifting gas and air therein, and is configured such that when the envelope is subjected to structural strain or experiences changes in temperature, power is generated, which is used to supply power to the various electrical systems aboard the airship.

Abstract: A laminate material for lighter-than-air vehicles includes at least one monofilament yarn layer, a polymeric film layer adjacent to the at least one monofilament layer, and a metallized coating adjacent to said polymeric film layer. A clear film cover layer may be adhered to the metallized coating, and one or more fluorescent dyes may be incorporated into the clear film layer.

Abstract: A splice seam for joining various sections of fabric together is disclosed, wherein the fabric sections are initially delaminated into their constituent plies. The plies associated with each fabric section are then interleaved with each other, and bonded together. The amount of surface area between each interleaved plies can be adjusted as so as to achieve a desired level of load carrying strength between the fabric sections. Additionally, the splice seam may utilize an external and/or internal seam tape to increase the strength of the resultant seam.

Abstract: A laminate material for lighter-than-air vehicles includes at least one monofilament yarn layer, a high modulus film layer adjacent to said at least one monofilament layer and optionally including reinforcing fiber or inorganic filler, and a metallized coating adjacent to said high modulus film layer.

Abstract: A plurality of polyurethane layers, some of which have a contrasting color with respect to an adjacent layer is formed into a laminate. During preparation, each layer is separately formed, as by spraying, and the contrasting color ensures that the preceding layer can be fully covered. The laminate can be utilized to cover areas or objects which are otherwise difficult to ensure that it has a continuous or complete coating. The invention is suitable for use as a coating and for the preparation of various in situ articles or enclosures, for example a fuel tank, such as commercial and military aircraft.

Abstract: A spray nozzle extension is affixed to the output of a conventional spray gun apparatus to allow an operator to spray a polymeric elastomer into enclosed spaces of an integral fuel tank cavity such as to form an in situ tank within the cavity. The nozzle tip is extended from the spray gun by a flexible hose and the complete unit includes variously arranged in-line filter and swivel connectors to achieve dispersion of lumps in the spray material and axial, yaw, and pitch rotation of the nozzle tip respectively.

Abstract: A plurality of polyurethane layers, some of which have a contrasting color with respect to an adjacent layer is formed into a laminate. During preparation, each layer is separately formed, as by spraying, and the contrasting color ensures that the preceding layer can be fully covered. The laminate can be utilized to cover areas or objects which are otherwise difficult to ensure that it has a continuous or complete coating. The invention is suitable for use as a coating and for the preparation of various in situ articles or enclosures, for example a fuel tank, such as commercial and military aircraft.

Abstract: A method for preparing a polyurethane which has good long term flexibility, solvent resistance and resistance to hydrolysis, said method comprising mixing three components just prior to curing said components comprising a prepolymer solution, a cement solution and a crosslinking solution, said crosslinking solution comprising a solvent, an aromatic diamine and the ketimine of an aliphatic diamine.

Abstract: A method for preparing a polyurethane suitable for lining fuel tanks, said polyurethane having good, fuel resistance and improved hydrolysis resistance by using a ketimine of an aliphatic diamine as a curing agent in a three-component system composed of a prepolymer solution, a cement solution and a curing agent solution.

Abstract: A method for preparing a polyurethane wherein the components thereof have a long shelf life. The formulation is made by separately preparing a prepolymer solution, a crosslinking solution, and a cement solution. Upon utilization, the solutions are mixed together and applied. The urethane has very good fuel resistance and can be used as a coating in fuel tanks as well as to form integral fuel tanks.

Abstract: A pneumatic pad comprises reinforcement fabrics of parallel cords pre-formed to a specific radius through the edges of the pad and press-molded to a very flat pre-pressurized configuration. At least two orthogonally oriented reinforcement fabrics are embedded in elastomer and have lapped ends positioned in opposite covers of the pad such that each cover comprises at least three cord reinforcement plies two of which are oriented orthogonally with respect to the other.