Hinge Hinge A hinge is a mechanical bearing that connects two solid objects, typically allowing only a limited angle of rotation between them. Two objects connected by an ideal hinge rotate relative to each other about a fixed axis of rotation: all other translations or rotations being prevented, and thus a hinge has one degree of freedom. Hinges may be made of flexible material or of moving components. In biology, many joints function as hinges like the elbow joint. There are many types of door hinges. The main types include: Other types include: Since at least medieval times there have been
Gliding Federation of Australia Gliding Federation of Australia The Gliding Federation of Australia (GFA) is the governing body for the sport of gliding in Australia. It was founded in 1949. The GFA is responsible to Civil Aviation Safety Authority for the conduct of safe gliding operations in Australia. This includes the setting and maintenance of flying standards and in particular training standards. It provides services to its members such as: In Australia, glider pilots are exempt from holding pilot licences but the GFA is responsible for the establishment of pilot certificates. These are regarded highly enough by CASA and the aviation industry to be