[python] Re: Ice racers

The normal skate blade grind is basically flat with a VERY slight concave or
"hollow" in the center of the blade.  That kind of grind doesn't work on ice
bikes or trikes because you need an edge for control, even while going
straight.  Also, it doesn't work because there isn't enough weight on the
blade.  While skating, the skater predominantly has most or all of their
weight on only one blade at a time, and that is usually not at a
perpendicular angle to the ice surface.  On a bike or trike, that weight is
divided over two or three contact points and isn't enough to make the blade
bite into the ice for the desired traction.  So, grinding a knife edge on
the skate blade is the solution.  It doesn't have to be a very sharp knife
edge either.

As for the rear end, the width(s) I picked were determined by balancing
making it as narrow as possible and making it as short as possible.  If it
is narrow enough to easily go through a doorway, that's good enough for me.
With 20" tires I can't make the trike too short or too narrow or the tires
will hit me, the seat or the frame when I corner.  Right now, the width and
wheelbase seems just about right.  I'll post the specs when I get a chance
to measure them all.

> Is that hollow or flat? I forget now...
>
> >The titling python rear end I am building for the PC2 is coming along
> >nicely.  It mounts in the drop outs in place of the rear wheel and you
can't
> >tell the difference in handling between the delta and normal rear end.
>
> Very nice looking!
> Will you make the rear narrower, possibly? I'd think a tilt-trike
> could do with a narrow set.
>
> Ray

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