To
clear things up a
bit, are you saying you want to have the curtain hung across the
stage, left to right in the 40'wide orentation and then you want the whole 40' width of curtain to move upstage and
down stage? How is the curtain to be hung? On a pipe
batten, on box
truss, on a left right
track of it's own, stapled to a wood
batten like a 1x3 or .....? At any rate, for 40' you will need at least 4 or 5 tracks for any support method except
truss. That's about 80' to 100' of
track which is out of the "small budget" catagory if you have to
purchase it.
Any standard
stage track will do the job, it's how you use it that will determine what is best for your application. Most
track systems of medium or stronger duty
rating have what are called scenery carriers. These are what you would use to hang your lace curtain
batten from. Quiet will depend on how well you hang the
track, which type/size/brand of
carrier you use, and the manner you wind up running the operating lines. The hardest part of rigging the lines will be to get them to work together. If you hang the curtain from
truss, you can get away with only two tracks so you will need only two operating lines. With practice two operators can learn to work together or if you have the time and skill you can rig it to operate like an old fashioned drafting parallel bar, so a single op
line will do. However the specialty rigging uses a lot more pulleys and each pulley adds friction to the
system, so a single
line will take, for example, about 3 pounds pull for every 1 pound pull on each of two single lines.
Hope this helps a
bit.