Tue Nov 06, 2012 8:33 am by rai
you could lighten it by milling the inner two inches to a much thinner "fuller" (groove, sometimes called a blood groove), or if you must have the appearance of thicknes, cut out the inner area leaving some diagonal webbing (diagonal is rigidity like you see on bridges, and that is always good, then fill in the cut away areas with aluminum to full width.
Just an Idea that you can carry around until you have more money to add to the project. or if a makerspace with a bridgeport mill arrives in your area.
in aircraft and dirigible design, using cutouts is done to lighen the strong beams, and it is done with large round holes or was done that way in the past, and with triangular cutouts, which should be rounded at the corners. you could get a very nice effect by doing this with a mill and not cutting the cutouts all the way through, just less than half way one each side, and if the diagonals of the triangles do not match exactly, on each side, as in making them cross in the center even though you cant see it you would retain a very strong and rigid blade with less heavy metal in it. you might even consider glass enameling in the cut outs if the blade temper can stand the heat of melting enamel glass in there.
Or even some celtic scroll work on the inner areas.
A heavy sword is harder and slower to swing, just as military rifles for urban combat are made shorter simply for the added speed in swinging them onto target.