Planning the structure

I have been considering viable options to create a cylindrical shape on which to project. The shape must be at least 2.4m in height and around five metres across in order to contain the viewer without generating any feelings of claustrophobia. While many surfaces will hold the projection, it is a question of practicality and cost effectiveness. An early solution was to hang fabric as a large curtain, however the cost of creating a circular rail on which to run the fabric was too high, as was a 15m x 2.4m piece of thick fabric. Plywood has been suggested, nailing to a curved piece of wood, which I will create in a model to test. Common size plywood is 2.4 x 1.2m, which is ideal, as the circumference of a 5m diameter circle is 15m, just 30cm short of the 14.6m the plywood would cover. The plywood would be nailed to a supporting frame made from two straight pieces of wood and three curved pieces, which would fit neatly together to form a circle. After making a 1:4 size foam board model, I will consider how practical this will be.