Re: ASRG

["Tesla list" <tesla-at-pupman-dot-com>]

Original poster: "Black Moon by way of Terry Fritz <twftesla-at-qwest-dot-net>" <black_moons-at-hotmail-dot-com>


I wonder, has anyone tryed dual rotar designs? iv heard only the non moving 
electrodes get really hot cause of little passing air, one guy suggesting 
dual rotar with something with holes in beween but others say metal would 
coat the holes, I say, why not just two moving rotars moving in oppsit 
directions?





>From: "Tesla list" <tesla-at-pupman-dot-com>
>To: tesla-at-pupman-dot-com
>Subject: Re: ASRG
>Date: Sat, 23 Nov 2002 21:05:17 -0700
>
>Original poster: "tesla by way of Terry Fritz <twftesla-at-qwest-dot-net>" 
><tesla-at-paradise-dot-net.nz>
>
>Hi Terry et al
>To amplify
>My first attempt at your design featured tunsten tips brazed onto a brass
>rod. Brass as you know is an excellent conductor of heat so the rod got hot
>over much of its length.
>This is different than your rotor made entirely of tungsten.
>My current design is now two tngsten rods (to get the reqd 226mm length)
>brazed into a brass sleeve in the centre.
>
>My rotor is 226mm long. As you may imagine the amount of expansion due
>heating is a proportional to temperature and the length.
>
>Your design features much longer metal electrodes than conventional axial
>elctrodes fastened into insulating rotors hence the potential for rotor
>expansion is much greater. As you comment  end play is not an issue in this
>design it is possible to achieve very close spacing between static and
>rotating electrodes.
>
>This is not a problem if you account for it. My inital set up clearances
>were very very close so I was asking for trouble  in my first attempt using
>15mm long tungsten tips on brass rod. (The brazing melted BTW)
>
>I use a "feeler guage" now to set up my spacing and now have no problem
>noting that I am now using tungsten the entire length. As you comment with
>this technique centre heating is minimal.
>
>I hope this clarifies my comments
>
>
>
> > Hmm,
> >
> > While the entire rotor is metal and long, numerous people have checked the
> > rod after a run and found that it was cool near the center.  The heat did
> > not travel that far down the length.  But I will check this out in more
> > detail.
> >
> > Not sure what you mean by point #2. Every RSG I have seen is set up so
>that
> > as the electrodes expand, they will tend to close the gap.  Can you give a
> > photo example of what you mean?
> >
> > One thing I now notice about this design.  It is not sensitive to play in
> > the motor bearings.  So a worn or lose bearing will not cause unwanted
> > contact.
> >
> > Terry Blake
> > Coiling in Chicago