routing a slope
Hi, my first post and I'm no router expert, so please excuse ignorance. I have to rebuild the lazarette on my boat, as its got a bit of wet rot. This involves remaking the timber frame which forms the top opening locker support. So here's the tricky bit - the frame includes 2 sections of mahogany which have a sloping channel to allow water to run away. In millimetres the section is 55 high, 38 across and 430 in length. and the drain is a slope that runs the length of the 430. How will I set up the router to cut that slope? Its basically what Americans call a dado cut (I think). The only way I can imagine is to make some sort of wedge shape out of a piece of scrap so the router runs up it as it cuts, gradually reducing the cut. But of course that's tricky, as I'll need to cut though the wedge. Oh I bet there's an expert on here who's done something similar.
John in the UK
by the way, before someone says post a drawing, I'm going to try to do so tomorrow.