RE: [TCML] Motors

["Lau, Gary" <Gary.Lau@xxxxxx>]

Hi Rich,

The real beauty of the propeller gap is its _relative_ ease of construction.  A Bridgeport isn't necessary if you can start off with a piece of ~ 1" x 1" x X Delrin, Lexan, nylon, or polyethylene for the arbor.  Did you check out Terry Blake's RSG page (linked on my page)?  He indicates you can buy 1x1 UHMW Polyethylene from McMaster-Carr.  The rest can be accomplished with just a drill press.

If your phenolic disk has a 1/2" center hole, it may be challenging to find something to mate that to anything else.

Regards, Gary Lau
MA, USA

> -----Original Message-----
> From: tesla-bounces@xxxxxxxxxx [mailto:tesla-bounces@xxxxxxxxxx] On
> Behalf Of Rich Schmuke
> Sent: Tuesday, January 29, 2008 2:12 PM
> To: 'Tesla Coil Mailing List'
> Subject: RE: [TCML] Motors
>
> That is a very nice set up Gary, but due to my health and retirement I no
> longer can get my hands on a Bridgeport to make the holder for the propeller
> , but I do have the rods both in 5/32 and 3/16. I would gladly trade some
> rods or other things for a extra block. I do have a phenolic?? disk with a
> 1/2 dia hole in the center and 6, 1/4" holes on the circumference  I was
> going to use as a start. I made it several years ago and has been on a
> shelf. I brought up the Kva because my RQ copper tube gap worked fine for
> the NST coil but my new transformer is a little much for the copper tubes.
> Rich , in the middle of Missouri
>
> -----Original Message-----
> From: tesla-bounces@xxxxxxxxxx [mailto:tesla-bounces@xxxxxxxxxx] On
> Behalf
> Of Lau, Gary
> Sent: Tuesday, January 29, 2008 12:36 PM
> To: Tesla Coil Mailing List
> Subject: RE: [TCML] Motors
>
> The power needed for an RSG motor is dependant only on the mass, or more
> accurately, the rotational inertia, of the rotating disk.  The KVA of the
> coil is irrelevant.
>
> I've always been bewildered by folks using HUGE motors on small coils.  From
> a purely aesthetic perspective, it seems silly to have the RSG motor
> consuming a significant portion of the total power.
>
> For NST-powered coils, a propeller gap is adequate to handle the power and
> is much easier to build.  If you are leaning towards a sync RSG, you want
> either 1800 or 3600 (preferred) RPM.  With a propeller gap, you can use as
> small a motor as you can find, as the rotor is just a single welding rod.
> My SRSG may be seen at http://www.laushaus.com/tesla/sync_gap.htm.
>
> Regards, Gary Lau
> MA, USA
>
> > -----Original Message-----
> > From: tesla-bounces@xxxxxxxxxx [mailto:tesla-bounces@xxxxxxxxxx] On
> > Behalf Of Rich Schmuke
> > Sent: Tuesday, January 29, 2008 1:13 PM
> > To: Tesla Coil Mailing List
> > Subject: [TCML] Motors
> >
> > Know this had been kicked around before but I just got the chance to get
> my
> > hands on a free or cheap  motor. Helping clean out a shop , still has some
> > NOS motors  in  boxes , been setting for a few years.
> >
> >  I have a small coil 2Kva . What should I look for on the tag besides
> > synchronous. Thinking about ¼ or ½ horse.
> >
> >
> >
> > Rich , from the middle of Missouri.

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