RE: Perfecting my final design...

["Tesla list" <tesla@xxxxxxxxxx>]

Original poster: "Lau, Gary" <gary.lau@xxxxxx>

Re. the tungsten rod, it depends on how powerful your coil is and how
long you want the rod to last before readjusting for erosion (ablation).
I use a 5/32" rod with a 15/60 NST.  Ablation is visible but not yet
significant, with perhaps 20 minutes total run time.

My Teletype sync motor is fairly small, but I'm sure it could spin up a
much thicker rod.

Regards, Gary Lau
MA, USA

> Original poster: "Adam R." <arabraxas@xxxxxxxxxxx>
>
> Okay, I went and purchased the Cu tubing: two rolls of 20 feet 1/4"
> OD....that gives me about 7.7 turns...should I just use  the whole
role or
> go with only five turns?
>
> Also, for the propeller gap, I bet I should go with 1/8": anything
larger
> and the motor might not be able to spin it. (or would a larger size be
better?)
>