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Re: [TCML] "Lifter" power supply questions
Peter,
I take it that you are aware of ASC thrust under oil? Only a little bit slower due to the viscosity of oil.
Not a lot of corona or ions under oil. Just maybe there are other explanations for ASC thrust.
My theory is that the HV hissing and vibration that occurs around a lifter at HVDC occurs just prior to true break down.
This is responsible for voltage and/or current oscillation which is probably necessary for ASC thrust. I suspect
dV/dT or even dI/dT is quite important .
The same mechanism is responsible for Tesla coil spinners. The altenating HV potential being supplied by the TC.
So, here's a question - If a very smoothed regulated HVDC source is applied to a TC secondary with a
spinner attached to the toroid and slowly ramped up will it spin at HVDC? At the point of break out from the spinner tips,
will it spin? Lastly, what does the wave form at break of look like?
I have built simple lifters and experimented with flat two dimensional horizontal ASC thrusters and I agree
with you, this is not antigravity.
Stork
----- Original Message -----
From: mrapol@xxxxxxxxxxxx
To: "Tesla Coil Mailing List" <tesla@xxxxxxxxxx>
Sent: Sunday, January 30, 2011 9:22:08 PM
Subject: Re: [TCML] "Lifter" power supply questions
I appreciate all the advice offered. I'm not a believer in antigravity. I
just wanted to build and fly a lifter. I understand DC is best (or even the
only thing to use), but when other people say I can use ignition coils or
NSTs, I am curious to find out how. The Hamilton Drills induction coil does
not do anything for the lifter but cause it to arc furiously, even using the
HV diodes peddled by the maker.
So far only the flyback in the CRT has done anything for the lifters. I have
built two of the triangular foil-and-wire type, powered by a CRT monitor.
They lift, though not as well as I would like. The device seems very
sensitive to the gauge and length of wire used to connect it to the power
source. If anyone has optimal suggestions on that score I'd like to hear
them.
My ultimate aim is to build a "thruster" on a spindle to demonstrate the
concept to others. I guess I should build a flyback power source (there are
lots of plans for them around), but I was hoping to use one of the devices I
had on hand.
PBT
----- Original Message -----
From: "Peter Terren" <pterren@xxxxxxxxxxxx>
To: "Tesla Coil Mailing List" <tesla@xxxxxxxxxx>
Sent: Saturday, January 29, 2011 8:57 PM
Subject: Re: [TCML] "Lifter" power supply questions
> As I have asserted early in this thread, I believe the best performance is
> with smoothed DC to give large amounts of stable corona short of sparking.
> An ignition coil as per the original enquiry is composed of short pulses
> of low duty cycle. Power is only available while the voltage is applied
> so a 10% duty cycle means 10% power for that peak voltage.
> I know of no-one who has constructed a successful lifter with these.
> I have made one that can carry its own weight in payload (3g) using 80kV
> smoothed DC from a CW multiplier derived from a Royer driven flyback.
> http://tesladownunder.com/Lifters.htm#Lifters-80kV
> I agree with Antonio's comments. Sadly lifter enthusiasts are almost as
> prone to pseudoscience as Tesla enthusiasts are and the whole field is
> muddied by antigravity and asymmetrical capacitor nonsense.
> Unfortunately it is real "rocket science" as ion drives are used in a
> thrusters in various spacecraft. Real scientists understand it perfectly
> well and they don't use Naudin's site for reference, I'm sure.
> Amateur experimentation will be plagued by the difficulties of
> measurement. Even simple voltage measurement at the lifter itself is
> difficult and the loading effect of even changing polarity giving
> different corona levels will be significant.
> Similarly any force measurements will be disturbed by electrostatic
> attraction to adjacent structures.
> To keep some association with Tesla coils I have observed that, while
> small coils drive ionic spinners quite well (where corona thrust is also
> used), a large(ish) Tesla coil has almost no effect.
> http://tesladownunder.com/Lifters.htm#IonicSpinners
>
> Cheers
> Peter
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