Re: Re: [TCML] "Lifter" power supply questions

[<mrapol@xxxxxxxxxxxx>]

I think the reference to wind forces being too small derives from the U.S. 
Army Research Laboratory study in 2003. See

http://jnaudin.free.fr/lifters/arl_fac/index.html

PBT

----- Original Message ----- 
From: "Antonio Carlos M. de Queiroz" <acmdq@xxxxxxxxxx>
To: "Tesla Coil Mailing List" <tesla@xxxxxxxxxx>
Sent: Sunday, January 16, 2011 1:13 PM
Subject: Re: Re: [TCML] "Lifter" power supply questions


> On 16:59, stork3264@xxxxxxxxxxx wrote:
> > Hi PBT,
> >
> > There is a lot of misinformation and "theories" on force produced by 
> > asymmetric capacitors. For instance one misconception is air thrust 
> > causes lifting force.  Actually, any air thrust is 2-3 orders of 
> > magnitude less than lifting force.
> A reference about this extraordinary affirmation would be interesting. The 
> mechanism of ionic wind is well understood, and the effect can be even 
> simulated with results that agree with experiments.
> There is nothing of "asymmetrical capacitor" in these devices. They don't 
> store significant charge, and are practically pure nonlinear resistive 
> elements.
> > Some folks deny lifters can be powered with HVAC.  Just shows how much 
> > confusion and false theory surrounds lifters.  All I can say is do the 
> > experiments.
> AC may work too, specially low-frequency AC, because the travel time of 
> the ions across the device is small. It just happens that symmetrical AC 
> sources of sufficient voltage are not so easy to build and there are less 
> experiments done with them. Anyway, the current through the lifter would 
> be somewhat asymmetrical due to the structure. I have tried a 5 kV NST, 
> but the thrust produced was very small. Even a 100 uA electrostatic 
> machine worked better. Enough voltage is important.
>
> Antonio Carlos M. de Queiroz
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