Re: My first ARSG, or a Dangerous Design?

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

Original poster: "robert & june heidlebaugh by way of Terry Fritz <teslalist-at-qwest-dot-net>" <rheidlebaugh-at-desertgate-dot-com>

Ken: Tungsten and tungsten carbide silver solder with no problem. A brass
mount or sleeve can be easly silver soldered to the rod. A dimple can also
be ground into the tungsten rod to act as a detent for a set screw to hold
-   Robert  H-


 > From: "Tesla list" <tesla-at-pupman-dot-com>
 > Date: Fri, 24 Jan 2003 20:29:51 -0700
 > To: tesla-at-pupman-dot-com
 > Subject: Re: My first ARSG, or a Dangerous Design?
 > Resent-From: tesla-at-pupman-dot-com
 > Resent-Date: Fri, 24 Jan 2003 20:34:24 -0700
 >
 > Original poster: "Crow Leader by way of Terry Fritz <teslalist-at-qwest-dot-net>"
 > <tesla-at-lists.symmetric-dot-net>
 >
 > A set screw probably won't press into tungsten and lock in place. It sounds
 > likely that the collars themselves would fly off.
 >
 > KEN
 >
 >
 > ----- Original Message -----
 > From: "Tesla list" <tesla-at-pupman-dot-com>
 > To: <tesla-at-pupman-dot-com>
 > Sent: Friday, January 24, 2003 1:33 PM
 > Subject: Re: My first ARSG, or a Dangerous Design?
 >
 >
 >> Original poster: "by way of Terry Fritz <teslalist-at-qwest-dot-net>"
 > <Esondrmn-at-aol-dot-com>
 >>
 >> In a message dated 1/23/03 5:56:50 PM Pacific Standard Time,
 >> tesla-at-pupman-dot-com writes:
 >>
 >>
 >>> Hi Scott, Dan, Terry B, All,
 >>>
 >>> OK here is some CONSTRUCTIVE criticism. IF there really is a problem of
 > low
 >>> coefficient of friction causing slippage, here is one way it can be
 > easily
 >>> cured:
 >>> 1) Push tungsten rod through an externally taper-threaded piece of split
 >>> brass tube, so that the tube is in the middle of the rod. The tube must
 > be
 >>> about 0.5" longer than the width of the hub. Hole in hub should also be
 >>> threaded.
 >>> 2) Thread tube with rod in it through hub.
 >>> 3) Put a locknut on each end of tube to both lock rod into tube and hold
 >>> tube locked into position in hub.
 >>> 4) Balance and Run.
 >>> 5) Naturally, all plastic parts subjected to rotational stress must be
 >>> inspected periodically for wear and replaced when wear is observed. This
 > is
 >>> true for HDPE, Nylon, Lexan, or G10.
 >>>
 >>> Without these modifications, even at 15,000 rpm, the tip speed of an 8"
 >>> rotor is  ~524 fps. If the rod did start to slip out, it would impact the
 >>> stationary electrodes before it could leave the hub. While this would
 > most
 >>> likely wipe out the rod, the electrodes, and the hub, it would be less
 >>> dangerous than an airborne disk or tangentially-flying small electrodes.
 >>> The design is very creative and hardly what I would call "makeshift".
 >>>
 >>> Matt D.
 >>
 >>
 >> Another idea would be to use some locking collars on each side of the
 >> flying electrode, butted up against the poly block that it is pressed
 >> into.  I noticed I have some of these in my model airplane hardware
 >> box.  They have set screws in them for locking and I am sure they are
 >> available with different size holes in the center (to fit different
 >> diameter rods).
 >>
 >> Ed Sonderman
 >>
 >>
 >>
 >
 >