Re: Another improved propeller gap

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

Original poster: "Terrell W. Fritz by way of Terry Fritz <teslalist-at-qwest-dot-net>" <terrellf-at-qwest-dot-net>

Hi Bob,

Gosh!!  I was going to order some other stuff from McMaster Carr, so maybe
I should get a few yards of kevlar just to play with.  I think it can be
worked like fiberglass and epoxy resin.  It is supposed to be rough on the
hands and such...  They also make phenolics with kevlar as the binder, but
never have seen it for non-military "public" sale.  Make a darn strong
rotor ;-))  I think you need special shears (or cheap ones) to cut the
stuff too...  Sounds like a single layer would stop anything a gap could
shoot out...

Cheers,

	Terry


At 05:01 PM 1/31/2003 -0700, you wrote:
 >Original poster: "bob by way of Terry Fritz <teslalist-at-qwest-dot-net>"
 ><yubba-at-clara-dot-net>
 >
 >hi terry,Steve
 >
 >kevlar blankets are used on tractor pulling rigs to catch the clutch as it
 >disintegrates under the strain of 4000 hp of Russian helicopter turbines
 >going at 50000 rpm. so should be good for a small rotary gap. if you use a
 >metal enclosure you will have to pour the bits out, at least the kevlar
 >might  leave something to examine afterwards.
 >
 >cheers
 >bob
 >
 >At 15:47 31/01/03 -0700, you wrote:
 >>Original poster: "Terry Fritz" <teslalist-at-qwest-dot-net>
 >>
 >>Just a note:
 >>
 >>McMaster Carr sells Kevlar fabric pretty cheap and easy.
 >>
 >>http://www.mcmaster-dot-com/param/asp/desc.asp?desc=Fabric%20Kevlar&descid=12055
 >>
 >>That may be a nice nonconductive light weight shield.  I have never tried
 >>or worked with Kevlar, but it may be a cool thing to use for parts flying
 >>off high speed gaps.
 >>
 >>Cheers,
 >>
 >>         Terry
 >>
 >>
 >>At 10:01 PM 1/31/2003 +0000, you wrote:
 >>>Hi guys
 >>>
 >>>I recently finished building the rotor for my ASRG. Due to a bunch of
 >>>different reasons I decided to go with a small rotor that spun very fast.
 >>>The finished item was about 3.5" in diameter and runs at least 12000 rpm.
 >>>I was inspired by the propeller gap that Terry Blake made, so my design
 >>>also has prong-like electrodes sticking out of a hub. Unlike the
 >>>original, though, the electrodes are bolted in place. I put some pictures
 >>>online, at
 >>>
 >>>http://homepages.strath.ac.uk/~cnbp111/tcpropeller.html
 >>>
 >>>if anyone is interested. I balanced it as well as I could and it's
 >>>getting tested tomorrow. My plan is to stick it inside a steel pot, hide
 >>>under the workbench, crank the motor up to 240 volts, and see if anything
 >>>gives.
 >>>
 >>>Steve C.
 >>
 >>
 >
 >
 >
 >