Second Try in Vane not in Vain
When I started my 2397 project last week, I neglected to read the thread titled "1200Hz Smith Horns for 1" Driver", which contained tonnes of useful info on building a set of these things. I was seriously humbled by the craftsmanship of the builders.
One useful piece of info I got from the thread was the fact that the vanes are sweeps of 25 1/4" radius arcs. My first attempt at the vanes were okay, but not perfect. The template was cut free-hand and some of the irregularities really showed after staining. Over the weekend, I took a second crack at the vanes, taking a very different approach. I built myself a 25 1/4" circle jig and carved out a set of vanes with it. This method is much easier and faster than using a template and laminate router as you can take multiple passes with a plunge router. The vanes all came out smooth and razor sharp.
http://www.audioheritage.org/photopo...2_DblCurve.jpg
More photos can be seen at http://pg.photos.yahoo.com/ph/lowgc/...owgc/my_photos
Hope to finish the surface next weekend.
Gar.