hey noodles

hi sorry noodles can u explain better ‘‘rail matrix istructions’’? English is not my language (is just little bit rusty or Im stupid) and somethink lost in ur description… can u explain maybe with a simple design diagrams ? Just for understand the points… I have my method rails…but I want learn more and diffrent method thank u very much…

Cut and paste from other posts: The measurements are in inches. Since inch measurements shorter than one foot break down in decimals, buy an engineer’s scale. For the outline, get a roll of wide paper. I use brown postage wrap. Tape the paper to a flat surface. Draw a straight line longer than the board, roughly centered down the length of the paper. This will be the center stringer line. Make a mark on one end. That mark will be zero, the board stern. Use a tape measure to measure up the line and make hash marks. Place marks at every “y” measurement within a foot or so of the board ends where the outline will curve a lot. You can mark every three or four inches at mid-board. Use a straight edge and a square to extend the hash marks to the rail lines. With your scale, measure from the stringer line, out each hash line, and place a mark where the rail will intersect it. By now you should be asking “Why didn’t I use crosshatch paper?” If you wanna blow the bucks, back up and use it. Draw a line around the rail outline. See how the outline looks. Adjust it as you like, then cut only the outline of one side of the board. Tape your template to the blank. Draw one rail, flip it and draw the other rail. Lets back up again. You just made an outline which measures the desired horizontal, but you’re going to lay it, curved over the bottom of the board. The template will be shorter than your desired board. I usually place the desired straight-measured end marks on the blank, then draw the nose and tail outlines from the ends to mid-board, shifting the template between draws. I’ve also placed the paper outline slightly short of where I wanted a longboard nose, then sharpened the nose from about 2 inches back. Use another long piece of paper the same way for a rocker template. Instead of cutting the template out of the paper, Get some spray on craft glue. Stick the paper to some 1/8" plywood, and cut an outside template along the board side of the line. Rail: Draw a +/- 12 inch “width” line. The line represents a line running across, through the wide point of the board at the height of the rail line, where the rail turns vertical. Mark zero on one end. Zero width is at the center of the stringer. Measure from the stringer, and mark widths on the line. At each width mark measure and mark corresponding heights up to the deck, and down to the bottom. You need an engineers scale to use the above method. But now that you have the concept, you can buy some 8.5" x 14" graph paper, divided in .1" or .2" lines, from an office supply store and do it alot easier. Is that what you needed? Good luck. I made this program because I have little experience in “eyeballing” outlines. I’m sure experienced shapers chuckle at this method, but it seem to be useful to us amateurs.

I understand roker and template matrix…I used too with cad program. I try again… thank u again