From: pnn@pnn.org
On Thu, 21 Aug 2025 21:47:27 -0700, Bob Casanova
wrote:
>On Thu, 21 Aug 2025 15:33:24 -0700, the following appeared
>in talk.origins, posted by Rufus Ruffian :
>
>>E.Laureti wrote:
>>
>>> Vincent Maycock posted:
>>
>>> > >>>>Briefly, how are you changing the field self-interaction to increase
>>> > >>>>the thrust of your PNN vehicle? Or are there other methods that
you're
>>> > >>>>using to accomplish that crucial goal?
>>> > >>>
>>> > >>>Yes, methods:
>>> > >>>
>>> > >>>1) Lower the impedance of the dipole
>>> > >>>
>>> > >>>2) Increase the current
>>> > >>
>>> > >>And are those things difficult to accomplish?
>>> > >
>>> > >To lower the impedance of a dipole fed at high frequency is not so
>>> > >simple, one would have to at least use silver wires, at least.
>>
>>Firstly, you have to match the impedance of your "dipole" load to the RF
>>source and to the transmission line.
>>
>>There are ways to lower the impedance of the radiating element, such as
>>increasing the diameter (which lowers the Q as well). Copper tubing is
>>great. For impedance matching, a transformer will work. You also need a
>>balun, as explained before, and there are simple, slick ways to realize
>>a balun and impedance-matching transformer all in one, using
>>transmission line or antenna stubs.
>>
>>However. Simply more current isn't going to solve your problem. The
>>velocity of charge carriers is just as important. You can have high
>>current drifting lazily along the element, and it won't give you vXB
>>force. You need to know the bulk drift rate of the electrons. You also
>>need to know the current distribution along the dipole.
>>
>>Silver wire isn't an answer. Element RF impedance is determined by the
>>geometry of the element. Metal conductivity has less to do with it.
>>Plus, "wire" (presumably thin) is going to give you high impedance and
>>high Q. Also, google "skin effect".
>>
>>What you are building is basically an antenna. Antennas are not known
>>for producing force, if you hadn't noticed.
>>
>>Then there's the unbalanced coax feed blooper, which you don't seem to
>>realize.
>>
>>Any vXB force is applied between the dipole and the magnets, not
>>externally, and that's your foremost miscalculation.
>>
>>Your RF half-cycles are still canceling out all your alleged force.
>>
>>I can't see why you are even using RF. Can you explain that? A DC loop
>>in 'n out the B field would work just as well, being infinitely simpler.
>>
>>A TV picture tube has an electron beam, guided by vXB force using the
>>magnets in the yoke. Shouldn't that produce thrust? Perhaps you could
>>just use a TV picture tube for your space propulsion system? As a side
>>benefit, it would entertain the astronauts all the way to Mars.
>>
>>I realize you can't answer any of these points, but your retorts are
>>endearing.
>>
>>
>>> > And you're saying those cost too much to try to use?
>>> >
>>> > >Second, and more important, to increase the current, all the circuitry
>>> > >must *support* high currents at high frequency, and some electronic
>>> > >components just melt under such stress.
>>> >
>>> > Which ones are melting down,
>>
>>The "designer".
>>
>>> > and why can't you replace them
>>
>>Because... :
>>
>>> $$$$$$ and to pay several engineers...
>>
>>You're building a device that will revolutionize space travel, and no
>>one involved can do any engineering, let alone the physics? So you have
>>to solicit investors and free advice on Usenet?
>>
>I suspect that "solicit investors" is the key.
My suspicion is that you are a troll
>>
>>Lord have mercy.
>>
>Indeed.
>>
Amen!
--- SoupGate-Win32 v1.05
* Origin: you cannot sedate... all the things you hate (1:229/2)
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