REFLECTOR: IVO Brush Modification

[Michael Watson]

John,

 I would think copper running on aluminum will ware a grove in the aluminum
rings ?
The brushes are much softer and does not ware down the rings. Also, that
setup should
generate static noise in your avionics.

Mike W.



On Wed, May 22, 2013 at 1:15 PM, John Dibble <aminetech at bluefrog.com> wrote:

> I've modified the IVO brushes using 12 gauge copper wire to contact the
> hub rings.  A solenoid lightly presses the wires against the rings when the
> pitch adjust switch is pressed.  The white wires going to the copper wires
> serve as a spring to keep the wires from contacting the rings when no pitch
> adjustment is being made.  I kept the original brushes in place to keep the
> rings clean of dirt/oil and to act as a backup in case this modification
> fails, and to supplement current transfer.  This is giving me a very rapid
> pitch change (100 rpm/sec).
>
> John
>
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