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How to copy a curve?

11K views 4 replies 4 participants last post by  a1Jim 
#1 · (Edited by Moderator)
I want to build a new window blind that fits a large curved window above my family room windows. Any suggestions on how to copy the curve?
 
#3 ·
more seriously though, I take it you are wanting the blind to follow the curve?

Grab some paper on a roll, like wrapping paper or construction paper and create a scribe using a stick with a dowel on one end and a pencil in the other. Tape the paper to the wall, and follow the curve with the dowel creating a concurrent radius or just trace the curve of the window for an exact copy. Then you can measure and do the math to figure radius. Finally transfer it to a sheet of 1/2" mdf or 1/4" hardboard for a pattern.

Remember the radius increases as you outward from the center point of the arc.

that is my suggestion
 
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