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Re: A "Revolutionary" Idea

Subject: 
            Re: A "Revolutionary" Idea
       Date: 
            Sat, 22 Mar 1997 12:59:23 -0800
       From: 
            Bert Hickman <bert.hickman-at-aquila-dot-com>
Organization: 
            Stoneridge Engineering
         To: 
            Tesla List <tesla-at-pupman-dot-com>
 References: 
            1


Tesla List wrote:
> 
> Subject:
>         A "Revolutionary" Idea
>   Date:
>         Fri, 21 Mar 1997 13:27:05 GMT
>   From:
>         Joe Cummings <joecmn-at-globalnet.co.uk>
>     To:
>         tesla-at-pupman-dot-com
> 
> At present I'm not able to do any practical work, so all I do is carry
> out
> Gedankenforschungen - thought experiments.
> 
> I have an idea about rotary spark gaps that, knowing the amount of
> expertise
> to be found on this list, I'm sure has been dealt with before. Anyway,
> I'll
> float it.
> 
> I assume a rotary S.G. has an electrode on the rotor, which, as it
> rotates
> comes opposite one or more electrodes on the stator, so to get more
> frequent
> sparks, the rotor has to be accelerated.
> 
> Now, has anyone tried staggering a number of electrodes on the rotor, so
> that there
> 
>  is more than one spark per rev, or x sparks per rev, depending on the
> number of electrodes on the stator?
> 
> Let's build a rotary with six static electrodes, and five on the rotor.
> Let
> us space the electrodes on the rotor using a compass, set, not at the
> radius, but at the length of the radius plus one fifth the length of the
> radius. Let's call the stator elctrodes S1,S2,etc., and the rotary
> electrodes R1,R2,etc.
> 
> Now starting with R1 and S1 sparking opposite each other, after a fifth
> times a sixth of a revolution, R2 and S2 are sparking, and after another
> thirtieth of a rev., R3 and S3 are sparking and so on. This will mean
> that
> there are thirty sparks per revolution.
> 
> Is this a feasible proposition? If so, then it could be worked out for
> any
> number of
> electrodes.

Joe, 

Slight modification to the post I sent before - the assumption is that
you will never have more than one pair of electrodes in a position to
fire at the same time. If you had M=6 and N=6 and all were equally
spaced, the NxM equation does not hold - you'd obviously get just 6
breaks/revolution. As long as M and N are not factors of one another and
are not the same, the relationship should hold.

-- Bert H --