The "Sea Vixen" is finally beginning to look like an airplane.
The jet exhaust starts with a 1/8 plywood former. The FM drawing could not be traced, since the hand drawn former wasn't close to being symmetrical. I redrew it in CAD, then printed it on vellum. I then temporarily attached the vellum to the plywood using spray cement. I used a 1 1/4" hole saw, in a drill press, to cut the holes and then cut and shaped the outside contour to match the vellum pattern.
The exhaust pieces are from plastic pill bottles. I went to the local pharmacy and handed the gal a circle guide and said I would like a few pill bottles to match the 1 1/4" hole in the template. She found the correct size, and then looked at me like I was crazy, when I didn't want the bottle caps! Cost... $0.00
I guess she is correct.. I am crazy!
The contoured pieces wrap half way around each exhaust. While the fitting is a little tedious, it is done using soft A-grain 1/16" balsa. Wet the outside of the contour with a little water and it takes the shape quite easily. This area will be stiffened when I use carbon fiber matt in the finishing process.