ORIGINAL: foodstick
if you are cutting a constant chord wing stack up your wood as thick as you can for your saw. A bandsaw works best. Lay your pattern on top. Run some long pins down thru the top, and also up from the bottom so the wood stays stacked precisely. Cut it outside the line on the saw leaving the line on the top part. now set them on your belt/wheel sander and gently take them down to the line, ..Unpin and you are set.
Yup. what foodstick said. You really need to get a bandsaw with a fine tooth blade. I don't like using a scroll saw for anything but inside cuts. Saw a brand new Delta bench top saw at a yard sale for $30.