Re: Rotary Spark Gap, the rpm's, and horsepower

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

Original poster: "Harold Weiss by way of Terry Fritz <teslalist-at-qwest-dot-net>" <hweiss-at-new.rr-dot-com>

Hi Jack,

Those film projector motors would be great for a 6" disk of 1/4" linnen or
canvas phenolic or G10.  For 120 bps, use 2 electrodes.  I have two of Dr.
R's SRSG's.  They are the same HP only at 1800RPM, and run 4 electrodes for
120 bps.

David E Weiss

 > Original poster: "by way of Terry Fritz <teslalist-at-qwest-dot-net>"
<JACKBINTHEBOX-at-aol-dot-com>
 >
 > First of all, I'd like to say thank you to all of you who answered my
 > previous posting about splicing two secondary coil wires together.  I will
 > be cutting my 4 foot secondary in half, and I guess I'll be making another
 > tesla coil with it soon!  Many thanks, you'all saved me from disaster.
 >
 > I will be making a RSG, but I don't quite understand the significance of
 > motor RPM's and horsepower in the design.  Is it better to have more or
 > less RPM's and horsepower?  I have a whole bunch of 1/20 HP, 3600 RPM
 > motors from film projectors.  Would one of these be suitable for an RSG
 > with like a 6" disc?  I see that most of the professional RSG's have huge
 > motors attached (1/4, 1/2, or 1 HP), but the RPM's are usually only like
 > 1800.  Why is it necessary to have so much power and so little RPM's?
 >
 > Many thanks,
 > Jack
 >
 >
 >