Two similarly sized beams arranged at 45 degree angle and are attached at the top forms a structure what that is popularly known as the A-frame. Due to their two legged structure, they have a good stability. A- Frames are often made from various materials like wood, steel, etc, and are attached at the top by rope, wielding, riveting or gluing glue. It is a basic structure that can bear a load in a lightweight, economical manner. Many advanced designs of A- frames have a connecting cross member, giving the structure an appearance of capital letter A.
A-Frames are also called Triangle frames or triangle controlled frames (TCF) in many references. They find wide usage to in hang gliders or ultra light aircrafts. On a ultra light aircraft, since the pilot is near and even in touch with the TCF, the structure holds all necessary accessories, like variometers, altimeters, etc,. But professional gliders suggest against crowding the A- frame space with instrument cluster, as it creates a distraction for the flyer.
Wheels have been attached to A- frames in many cases to facilitate ground handling, take off rolls, etc. In many structures, skids, skis, floats and surfboards have been placed used in place of wheels to make the equipment fit for special adventure sports. In the history of aviation, A- frames have found several usages and various wheel mounting methods have also found mentions. In fact, A- frames or TCF are primitive forms of early aircrafts when men just unravelled the theory of flying. The structure still is popular among adventure sports enthusiasts.
Tags: glue, wheels, rope, degree angle, distraction, adventure sports, aircrafts, sports enthusiasts, triangle, beams, skis, skids, wood steel, necessary accessories