Re: ASRSG motor help

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

Original poster: FutureT-at-aol-dot-com 

In a message dated 6/27/04 11:59:33 PM Eastern Daylight Time, 
tesla-at-pupman-dot-com writes:

Steve,

I used a rather weak vacuum cleaner motor in an ARSG and got about
5000 rpms.  I then tried a stronger vacuum cleaner motor and
got about 6000 rpm or so.  This was my 12 point series quenching
rotary that I used on the magnifiers, not that it gave any benefit
over a normal ARSG rotary.  Of course the rotor size and air
resistance will affect the ultimate RPM.  The strong motors usually have
the dual compressor system attached in the vacuum cleaner

John


> >Original poster: "steve" <steve_vance-at-cablelynx-dot-com>
> >
> >Hi list,
> >  I need some help trying to figure out a motor's RPM. I plan on building
>a
> >400 bps ASRSG using a motor out of a vacuum. I taped a small piece of
>white
> >plastic on the end of the shaft like a propeller then I powered it up
>slowly
> >under florescent lighting using a variac. Someone please correct me if I'm
> >wrong, or tell me if I'm right on this. At about 15% power I get a pattern
> >with 8 sections. I believe this should be around 800 RPMs. At 22% I have a
> >pattern with 4 sections. I believe this is around 1800 RPM. At 28% I have
>2
> >sections, I figure 3600rpm. At 32% I get another 2 section stationary
> >pattern and again at 36%. What rpm would 32% and 36% be? I need about 6000
> >RPM.
> >
> >Steve Vance
> >
> >
> >
>