Re: rotary gap electrodes
In a message dated 96-08-20 02:36:30 EDT, you write:
<< I use .180 dia. W electrodes monted in aluminum rods 5/8" in diameter on
maggy 11's series rotary gap. They are captured by aluminum mounts which
are themselves mounted on heat resistant fiber glass. They get so hot
(~700 deg F) that they dis-color the fiberglass two inches away from the
rod! I use about 5-8KW normally. I have used 10KW on this gap once or
twice and the Tungsten got almost white hot on the tips and a white ring
of flame was seen as the gap spun. (It had reached its limit) I would
limit your gap and system to about 5-7KW with 1/8 W rod electrodes. The
fan action of the rotor will cool about as good as an auxiliary fan.
Richard Hull, TCBOR >>
I have constructed a rotary gap using the .125" tungston rods also.
I have wondered if routing a blast of compressed air to each side of the
rotary gap would help cool it, and would it help to quench it at all?
Kevin M. Conkey
[Well, with the fan action of the rotor, you could rigidly suspend the rods
or rod holders in such a manner that the air can pass around them. Then
put some inlet holes near the hub. The result (speculating) is a blast of
air around the electrodes. -- Chip]