Re: [Vo]: EM Drive(s)

ond.com [mailto:mix...@bigpond.com] > Sent: Thursday, March 17, 2016 1:31 PM > To: vortex-l@eskimo.com > Subject: Re: [Vo]: EM Drive(s) > > In reply to Russ George's message of Thu, 17 Mar 2016 11:18:21 -0700: > Hi, > [snip] > >In building a Shawyer EM Drive cavity copper is t

Re: [Vo]: EM Drive(s)

l.com] > *Sent:* Wednesday, March 16, 2016 7:47 AM > *To:* vortex-l@eskimo.com > *Subject:* Re: [Vo]: EM Drive(s) > > > > Eric, my understanding of the Crookes radiometer is that it measures light > intensity by the rotation of its vane, but the effect is NOT

RE: [Vo]: EM Drive(s)

of holds. From: Bob Higgins [mailto:rj.bob.higg...@gmail.com] Sent: Wednesday, March 16, 2016 7:47 AM To: vortex-l@eskimo.com Subject: Re: [Vo]: EM Drive(s) Eric, my understanding of the Crookes radiometer is that it measures light intensity by the rotation of its vane, but the effect

Re: [Vo]: EM Drive(s)

the vehicle than is converted from the mass depletion. Dave -Original Message- From: Bob Higgins <rj.bob.higg...@gmail.com> To: vortex-l <vortex-l@eskimo.com> Sent: Thu, Mar 17, 2016 4:38 pm Subject: Re: [Vo]: EM Drive(s) You can get about a 6% impr

Re: [Vo]: EM Drive(s)

I have not analyzed Shawyer's cavity design to understand what resonant mode is responsible for his thrust, and what other resonant cavity modes are supported by the cavity. The microwave oven magnetron can be pulled in frequency somewhat by a highly coupled resonant mode. You want to make sure

Re: [Vo]: EM Drive(s)

In reply to Russ George's message of Thu, 17 Mar 2016 11:18:21 -0700: Hi, [snip] >In building a Shawyer EM Drive cavity copper is typically used but Shawyer >notes a higher Q would result with silver. Would a cavity that was made of >copper sheet then electroplated with silver suffice to give

Re: [Vo]: EM Drive(s)

You can get about a 6% improvement in Q of the resonator by plating several skin depths of Ag on top of the Cu. This is frequently done to reduce filter loss where the loss is dominated by metal losses. It is possible to choose resonant cavity modes that have higher Q due to less coupling to the

RE: [Vo]: EM Drive(s)

: Thursday, March 17, 2016 1:31 PM To: vortex-l@eskimo.com Subject: Re: [Vo]: EM Drive(s) In reply to Russ George's message of Thu, 17 Mar 2016 11:18:21 -0700: Hi, [snip] >In building a Shawyer EM Drive cavity copper is typically used but Shawyer notes a higher Q would result with silver. Would a cav

Re: [Vo]: EM Drive(s)

On Wed, Mar 16, 2016 at 9:46 AM, Bob Higgins wrote: Eric, my understanding of the Crookes radiometer is that it measures light > intensity by the rotation of its vane, but the effect is NOT due to photon > emission recoil, it is due to the effects of the differential

RE: [Vo]: EM Drive(s)

performing simple copper;) naturally a far superior result would be expected with a silver EMCF Drive! From: Bob Higgins [mailto:rj.bob.higg...@gmail.com] Sent: Wednesday, March 16, 2016 11:44 AM To: vortex-l@eskimo.com Subject: Re: [Vo]: EM Drive(s) The problem with this is creating

RE: [Vo]: EM Drive(s)

Here’s a rather recent academic paper on EM Drives http://www.helsinki.fi/~aannila/arto/emdrive.pdf From: David Roberson [mailto:dlrober...@aol.com] Sent: Thursday, March 17, 2016 2:28 PM To: vortex-l@eskimo.com Subject: Re: [Vo]: EM Drive(s) Does anyone recall how the force generated

Re: [Vo]: EM Drive(s)

Eric, my understanding of the Crookes radiometer is that it measures light intensity by the rotation of its vane, but the effect is NOT due to photon emission recoil, it is due to the effects of the differential heating of the minute amount of gas present in the bulb. In a hard vacuum, this

RE: EXTERNAL: RE: [Vo]: EM Drive(s)

is made of holds. From: Bob Higgins [mailto:rj.bob.higg...@gmail.com] Sent: Wednesday, March 16, 2016 7:47 AM To: vortex-l@eskimo.com<mailto:vortex-l@eskimo.com> Subject: Re: [Vo]: EM Drive(s) Eric, my understanding of the Crookes radiometer is that it measures light intensity by the ro

RE: [Vo]: EM Drive(s)

of the internal cavity antennae that emits the microwaves. From: Bob Higgins [mailto:rj.bob.higg...@gmail.com] Sent: Wednesday, March 16, 2016 11:44 AM To: vortex-l@eskimo.com Subject: Re: [Vo]: EM Drive(s) The problem with this is creating the anisotropy in emissions from an induced

Re: [Vo]: EM Drive(s)

On Tue, Mar 15, 2016 at 11:47 AM, Bob Higgins wrote: My understanding, and I could be wrong, is that the thrust Shawyer > calculates and measures from his devices is several orders of magnitude > higher than what could be obtained from photon radiation recoil - even if

Re: [Vo]: EM Drive(s)

On Tue, Mar 15, 2016 at 12:21 PM, Russ George wrote: Your understanding is correct, the thrust observed is far from that > possible due to photon radiation recoil. That’s a bogus strawman lure cast > up from under the bridge. > Please explain how a thought experiment is a

RE: [Vo]: EM Drive(s)

wondrous miracles. I can see in my minds eye Bussard collectors being put to a practical use. From: Bob Higgins [mailto:rj.bob.higg...@gmail.com] Sent: Tuesday, March 15, 2016 9:47 AM To: vortex-l@eskimo.com Subject: [Vo]: EM Drive(s) My understanding, and I could be wrong

[Vo]: EM Drive(s)

My understanding, and I could be wrong, is that the thrust Shawyer calculates and measures from his devices is several orders of magnitude higher than what could be obtained from photon radiation recoil - even if all of the generated RF were radiated unidirectionally. A small leak of RF would

Re: EXTERNAL: [Vo]:EM Drive(s)

In reply to Russ George's message of Mon, 14 Mar 2016 11:51:50 -0700: Hi, [snip] >In >either case the 'thermal radiator' will be the challenge. If the engine, with small shield, is at the end of a long connector with the living quarters, then the long walls of the connector can be used as

RE: EXTERNAL: [Vo]:EM Drive(s)

Message- From: Roarty, Francis X [mailto:francis.x.roa...@lmco.com] Sent: Monday, March 14, 2016 11:36 AM To: vortex-l@eskimo.com Subject: RE: EXTERNAL: [Vo]:EM Drive(s) Even kilowatts of electrical energy for kilowatts of propellant-less thrust - don't need to get OU if we can just dispense

RE: EXTERNAL: [Vo]:EM Drive(s)

: EXTERNAL: [Vo]:EM Drive(s) Now that there are lenr kits and bits being sold and as well the Orbo's it is time for someone to offer EM Drive kits. Enough of this fantasy about a cell phone that needs no battery or an efficient home heater... What is really inspiring is making science fiction's most

Re: [Vo]:EM Drive(s)

One advantage the EMDrive has over LENR, is that it's fairly replicable. The amateurs can do it. https://www.youtube.com/watch?v=Rbf7735o3hQ Craig

RE: [Vo]:EM Drive(s)

From: Vibrator ! Ø So an EM drive in a lab cannot show an energy asymmetry because it can't accelerate anywhere. That does not add up logically or scientifically… Despite conflicting claims, no one has yet “busted” all of the positive results, which are probably about “chirality”

Re: [Vo]:EM Drive(s)

There were one or two replication attempts on the NASA forums following the most recent positive, albeit inconclusive, results. But unfortunately it suffers from a similar problem as LENR in that few folks have the cahoneys or resources to play with live magnetrons. This is lab science, not

[Vo]:EM Drive(s)

Now that there are lenr kits and bits being sold and as well the Orbo's it is time for someone to offer EM Drive kits. Enough of this fantasy about a cell phone that needs no battery or an efficient home heater... What is really inspiring is making science fiction's most desired fiction a reality