Re: propeller gap help (fwd)

["Tesla list" <tesla@xxxxxxxxxx>]

---------- Forwarded message ----------
Date: Tue, 24 Jul 2007 06:50:06 -0400
From: Scott Bogard <teslas-intern@xxxxxxxxxxx>
To: tesla@xxxxxxxxxx
Subject: Re: propeller gap help (fwd)

Although, after a little thinking, a 1/4 brass rod will most likely conduct 
better than a 1/8 tungsten rod (I haven't calculated it yet).  Use your 
discretion.
Scott Bogard.


>From: "Tesla list" <tesla@xxxxxxxxxx>
>To: tesla@xxxxxxxxxx
>Subject: Re: propeller gap help (fwd)
>Date: Mon, 23 Jul 2007 20:57:41 -0600 (MDT)
>
>
>---------- Forwarded message ----------
>Date: Mon, 23 Jul 2007 22:57:50 -0400
>From: Jason Johnson <jasonmsusolar@xxxxxxxxx>
>To: Tesla list <tesla@xxxxxxxxxx>
>Subject: Re: propeller gap help (fwd)
>
>Scott,
>
>Good call on the conductivity. They are close though, at 28 and ~30 percent
>IACS (International Annealed Copper Standard). I ran across a useful table
>for conductivities here:
>
>http://www.ndt-ed.org/GeneralResources/MaterialProperties/ET/ET_matlprop_Misc_Matls.htm
>
>Jason
>
>On 7/21/07, Tesla list <tesla@xxxxxxxxxx> wrote:
> >
> >
> > ---------- Forwarded message ----------
> > Date: Sat, 21 Jul 2007 11:45:18 -0400
> > From: Scott Bogard <teslas-intern@xxxxxxxxxxx>
> > To: tesla@xxxxxxxxxx
> > Subject: Re: propeller gap help (fwd)
> >
> > Jason,
> >      Brass does not conduct better than tungsten (sorry).  I thought it
> > did
> > as well, but it does not, look it up.  You are correct that the threads
> > will
> > give better cooling though.  I you wanted super cooling, you might 
>thread
> > a
> > few washers spaced with nuts to act as fins, but this may increase the
> > weight and drag, making it impractical on all but a stronger motor.
> > Tungsten will indeed last longer, But I never used it until I started
> > using
> > high current MOTs (I used steel before, which is not at all ideal, but 
>it
> > worked).  Good luck Shaun.
> > Scott Bogard.
> >
> >
> >
>
>

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