Re: Strong Rotor Material???

["Tesla list" <tesla@xxxxxxxxxx>]

Original poster: DRIEBEN@xxxxxxxxxxxxxxx 

Gary, Steve,

I second the GPO-3 electrical grade fiberglass from
McMaster-Carr. The only thing different I would do
is to go with 1/2" thick as opposed to 3/8". It does
serve admirably for this purpose, though and it's con-
siderably cheaper than G-10. A 1/2" x 11 1/8" GPO-3 disc
is what I'm using for the rotor of my large coil that
I have just about completed building now.


David Rieben

----- Original Message -----
From: Tesla list <tesla@xxxxxxxxxx>
Date: Thursday, January 6, 2005 11:38 pm
Subject: Re: Strong Rotor Material???

> Original poster: "S&JY" <youngsters@xxxxxxxxxxxxxxx>
>
>
> Gary,
> McMaster Carr sells GP03 electrical grade fiberglass that works
> great for
> rotors.  www.mcmaster.com.  Recommend 3/8 inch thickness.  A 12 x
> 12 piece
> of this only costs about $13.  Part # is 8549K47.  Be sure to have
> enoughspace between hub and your electrodes so there is no way
> sparks can jump
> between them.  I would say you need at least a 5 inch diameter rotor.
> --Steve Y.
>
> ----- Original Message -----
> From: "Tesla list" <tesla@xxxxxxxxxx>
> To: <tesla@xxxxxxxxxx>
> Sent: Thursday, January 06, 2005 6:17 PM
> Subject: Strong Rotor Material???
>
>
> > Original poster: "Gary Weaver" <gary350@xxxxxxxxxxxxx>
> >
> > Where can I buy some strong rotor material.  My rotor  is going
> to be 5
> > inch diameter maximum maybe only 4 inch diameter with 1 sheet metal
> > contacts held on with small bolts.  The rotor will be bolted to
> a 2 inch
> > diameter metal hub turned by a motor.  There will be a 2 inch
> diameterhole
> > in the rotor material with eight 1/4" x 28 bolts holding it to
> the hub.
> > The material needs to be strong enough to turn 7500 RPM's
> without self
> > destructing.
> >
> > This is NOT going to be a spark gap rotor.  The rotor will be
> used to
> > direct sparks to 4 different places.   I worry about having a
> fire ring or
> > spark ring around the rotor.  I have seen rotors that produces a
> continuous
> > circle of sparks that shorts out all the contacts.   I thought
> about using
> > the distributor from a car engine but I think the voltage will
> be too high
> > for that and would jump across all the contacts on the inside
> of the
> > distributor cap.
> >
> > Gary Weaver
> >
> >
> >
> >
>
>
>