>
> > I machined a cone in a dowl that is a light press fit in the center hole
> of
> > the prop.  I then ballance the prop on a pointed rod (held vertical in a
> > vise) in the center of the machined cone.
> >
> > A sensitive round bubble level (like those on a transit) indicates the
> > direction and amount of imballance.  I use weights rivited to the
spinner
> > backing plate to ballance the whole assembly.
> >
> > Tracy
>
> So does the flat surface of the cone get pressed in past the surface of
the
> prop so that the point of contact is inside the hole to give some
stability?
> Thanks for clarifying this
> Peter
>

Not sure I understand the question but the top of the cone (It is a concave
cone BTW) where the point of the rod goes should be positioned slightly
above the CG of the prop/spinner, etc.

Tracy

>