Dyform is a "high Tech" wire rope .... in normal wire rope all the strands a circular and therefore leave little spaces in between the strands when wound. In Dyform the strands are triangular (actually trapizodal) so that when wound together the strands are much tighter. Also the process of forming the strands into a trapizodal shape "work hardens"/strenghtens the strands resulting in stronger wire rope for the same size diameter .... some people like Dyform as you can reduce the diameter but still have the same strength.
I used dyform when I replaced the diamond wires on my P19 mast when I installed a chute but I used the same diameter since I was looking for more strenght for the increased loading.
I have been using Dyfrom on my Tornado for many years now...will never go back to 19 strand.
To make Dyform, they wrap normal strands together then force the bundle through a dye (hence "Dyform")...this squashes the strands into the trapezoid shapes and removed most of the air spaces between them. The work hardening typically increases the strength by 1/3. The reduction in surface area helps slow down corrosion issues. The individual strands are larger than typical wire rope, thus they outlast others before needing replacement. I've never seen a bit of Dyform with a broken strand. I do replace it and have fall back sets just in case...but I'm getting way better life than with the older type.
Mike.
