Gore (segment)

A gore is a sector of a curved surface ^[1] or the curved surface that lies between two close lines of longitude on a globe and may be flattened to a plane surface with little distortion. ^[2] The term has been extended to include similarly shaped pieces such as the panels of a hot-air balloon or parachute, ^[3] or the triangular insert that allows extra movement in a garment. ^[4]

Examples

A parachute and hot air balloon, both constructed from gores of material

Single-use American WW II aircraft impregnated paper drop tanks, the ends of which used gores of paper to form their curved shapes.

• Spherical globes of the Earth and Celestial sphere were first mass-produced by Johannes Schöner using a process of printing map details on 12 paper gores that were cut out then pasted to a sphere. This process is still often used. The gores are conveniently made to each have a width of 30 degrees of longitude matching the principal meridians from the South Pole and North Pole to the Equator.
• Parachutes and hot air balloons are made from gores of lightweight material. The gores are cut from flat material, and stitched together to create various shapes.
• Pressure suit joints are often constructed of alternating gores and convolutes of material constrained by cables or straps along the sides of the joint, producing an accordion-like structure that flexes with nearly constant volume to minimize the mechanical work which must be done by the suit occupant.^[5]
• Corners in round duct-work can be created by welding or fixing gores of metal sheet to form a bend.
• Some designers use the stretched grid method to design gores that are cut out of weather-resistant fabric and then stitched together to form fabric structures.

The gores of Waldseemüller's 1507 globe of the world, the first to use the name "America"

References

1. Chambers English Dictionary (1988)
2. "gore - GIS Dictionary". Support.esri.com. Retrieved 2013-09-08.
3. "Hot Air Balloon Manufacturer, Hot Air Airships, Balloon Repair Station". APEX Balloons. Retrieved 2013-09-08.
4. Tammie L. Dupuis. "Recreating 16th and 17th Century Clothing". The Renaissance Tailor. Retrieved 2013-09-08.
5. Harris, Gary L. (2001). The Origins and Technology of the Extravehicular Space Suit. San Diego: American Astronautical Society. pp. 1–89. ISBN 0-87703-482-6.