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Self-adhesive ripstop patches are used to repair other fabrics. Ejection seat parachutes made with ripstop are woven with an elastic-like fabric so that they stretch to allow more air to pass through at high speed. Then as the ejection seat slows, the weave closes and acts like a conventional parachute.
However, patches are sometimes applied to strengthen specific areas of a canvas. [8] Strip linings can be added to reinforce the margins of a painting. This practice is important as the margins of a painting are often more damaged than the rest of the canvas. [2] Strip linings strengthen the edges of the canvas so that they can withstand re ...
The most important technical challenges in the implementation of a successful composite patch repair are: (a) proper design of the repair patch and the procedures that will be followed, (b) selection of the most suitable materials and tools for the application, (c) careful surface preparation, (d) implementation of the composite patch repair ...
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Air humidity also affects how tight the canvas will dry. This process should be then repeated once more. After this if needed, the canvas can be lightly sanded flat. [1] Then an oil-based primer is applied. A canvas sized with rabbit-skin glue can be made tighter than with other alternatives—such as an acrylic-based gesso—because of the ...
A rail repair dutchman is typically a 4–6-inch (100–150 mm) long piece of rail that is cut in advance for the purpose and carried by a section crew. If the gang finds a rail with a chipped or broken end, they remove the connector plates ( fishplates ), cut out the damaged section, replace it with the dutchman, and bolt the connectors back ...