Concave? Convex? Con-Curve? Aw, Heck
Issue: Issue 245.5
Posted Date: 4/1/2010
I sure hope you can help me. I'm
building a garden decoration lighthouse, with working rotating lamp,
three-quarter scale steps up the inside, painted in a traditional
red and white pattern of alternating stripes. Oh, and it faces left.
Do you know where I could find instructions on cutting the concave
part of the base? I don't want to make too many passes on my table
saw, because I'm trying to reduce the wear on my blades. - P.I.
Nellie Joanna Bly:
For a concave base, you could find some old reference books on
creating dugout canoes or (root) beer barrels and use a scorp to
hollow out your curve.
Ron Jobstone: Are
you sure you mean a concave base? Most lighthouses I've seen are
convex. In that case, you don't need to use your table saw at all.
First, buy some dimensioned lumber, then mill it down to size on your
planer, create a hollow core on your lathe, then clamp this newly
created jig to your band saw and use its freehand capability to cut
around the curve. You'll probably go through a few band saw blades,
and you might want to find an extra pair of hands or a heavy-duty
clamp, but the wear and tear on your table saw will be minimal.
Skeeter Marshall: Of
course, if you make a concave base, you could use it as a planter and
create your stripes with red and white flowers. I might just have to
add that to my summertime to-do list, after I regrade the driveway,
replace all the trimwork in my house, grout the bathtub, install new
flooring in my shop, build five blanket chests for family members,
plant and harvest some wheat so I can grind my own flour, and sharpen
all my chisels, gouges, knives, scissors, manicure sets, and so on
with a whetstone.