Originally Posted by Willd
Would it not be much
more expensive to build a metal enclosure, as opposed to one out of plywood or MDF?
Im not sure, though one thing I wonder is the noise the material itself makes. You can tap on a hunk of MDF with your knuckles and get a dull thud sound. Tapping your knunckes on metal, you get an echoing bang/twang/clank sound.
Its been awhile since Ive ordered steel sheet-metal, but I beleive it costs me $75.00 for a 6x8 (or was it 6x10? 4x8??? I forget) sheet of 1/8th inch thick. I suppose if you covered one side of it with some deadening material like rubber, it would be fine.
The thing about the snail design, is its a cylinder. Correct me if im wrong, but pressurizing a cylinder, you mostly just get a force that streches the metal. In a cube, you get a force that will try and bend the sides outwards. I think the word for it is tensile strength. I can give you a 1/4" thick steel rod 1 foot long, most people shouldnt have too much trouble bending it in half, with just two hands and possibly a vice, if they are using good steel. But I dont beleive anyone could strech that 1/4" thick steel rod by hand, considering towing chains are about that thick.
Im sure you could build a snail design out of steel sheet metal for fairly cheap, the neat thing about metal, you can bend it. Though, it takes a lot of skill to do things correctly with metal, especially rolling flat peices into perfect cylinders, and welding it all together without warping anything.