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Re: Sneak Preiew: Rotary Gap W. adjustable electrodes

In a message dated 99-07-31 06:59:43 EDT, you write:

<< Original Poster: Finn Hammer <f-hammer-at-post5.tele.dk> 
 
> Gang!
 
> I have been pondering the possibility of designing a rotary-gap rotor,
> that would be segmented to allow pass-trough electrodes, and where the
> electrodes were fixed in removable clamps, which could be fixed in any
> angular position. So that it would make no difference where on the disk
> it is put.

Hi Finn,

That's a very clever design you came up with!  I guess you'll use small
set-screws to hold the clamps in position.  And I guess you'll remove
a small secton of the rim at two (for balance) opposing spots across
the rotor, to allow the clamps to be slipped onto, or removed from the
rotor.   

Such a rotor would have great flexibility for both sync and non-sync
rotaries.  You could easily vary the number of gaps, and
experiment with different degrees of offsets.  For sync rotaries, the
BPS could be easily changed, and various offsets (unequal spacings)
tested.

Unequal electrode spacings can be used for three different purposes
that I'm aware of:  To correct the power factor as Richie mentioned,
to vary the charge on the cap at points along the sine wave as Terry
has mentioned, and as I have experimented with in the past.
Finally, to create bunched electrode groups that permits a high
speed sync gap with many electrodes to fire at a low bps, with the
gaps in series.  I have a sync rotary gap like this that I built.  It
has 8 electrodes arranged in two bunches of four, so although the
gaps all sweep by each other as the rotor spins, the electrodes
all align only twice per revolution for 120 bps, using a 3600 rpm
motor.  At each firing, the spark snakes through all the gaps for
better quenching (and higher losses  :^C  )  There was a photo of
this sync rotary at Chip's website, I don't know if the photo is still 
there.

Cheers,
John Freau
 
> The results of my visualisation kan be viewed here:
 
> http://home5.inet.tele.dk/f-hammer/tesla/DETALGP.jpg
 
> This shows one of the electrode-clamps, positioned with it`s " T " -
> shaped slot locked around the rotating disk`s equally dimentioned male
> representation of a " T ".
  
> http://home5.inet.tele.dk/f-hammer/tesla/TOTALGAP.jpg
 
> Basically this is a slight shift of the camera`s axis, and zooming out
> to show the total disk, with several of the electrode sub-assemblies in
> random position.
 
> I will appreciate feedback from seasoned rotary-users, like for example
> answer this question:
 
> Do you think it can do something you wish you could do ?
 
> Cheers, Finn Hammer
  >>