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Re: Rebuilt Rotary
From: Chuck Curran[SMTP:ccurran-at-execpc-dot-com]
Sent: Saturday, September 13, 1997 9:44 PM
To: Tesla List
Subject: Rebuilt Rotary
Hello All:
Tonight I got all set up to test my latest system changes. My rotary
gap had been set up with 12 moving electrodes on a G-10 disk and the two
fixed electrodes were 1/8" diameter tungsten rods mounted in 1" diameter
brass for heat sinking. It had become apparent that this set-up just
wasn't going to last at over 12 Kw input. The tungsten was clearly
becoming molten and really looked rough. I also was interested in
reducing the quench time, so I made several changes.
First I was able to get one 4" length of 3/16" tungsten which I cut into
1" pieces and mounted two in the fixed electrodes in the rotary. Next I
removed 6 of the twelve moving electrodes and checked the balance again
on the assembly, prior to going to a higher RPM. We have a portable
balancing system for our lathe spindles at work, so I was able to take
it home and fine tune the rotary and then I ran it up to what turned out
to be 3850 RPM, or 385 PPS which was the range I wanted to be in. Now I
waited for the night and started to get everything out into the driveway
and wired up. Then the rain started. Just a light drizzle but enough
to make me call it quits. Well, maybe tomorrow night! I plan on taking
some more photo's with some different exposure settings and I also want
to set up the scope and see what the quenching is looking like. I am
planning on growing three more arms for all that activity.
Chuck Curran
Cedarburg, WI