Quote from: SeeShells on 10/08/2015 11:05 pmQuote from: rfmwguy on 10/08/2015 10:54 pm500 Downloads on the NSF-1701 Phase I Test Report from this thread and last.Moral of the story...people are still interested in the emdrive concept and they are starving for information.Does not look like Cannae, Tajmar, Shawyer or Yang have anything new to report. Still have hopes that EW is busy at it from the rumors I heard last year.If anybody else finds anything out there, be sure to post it here.Haven't heard much from this side other than rumors that something might be happening. Who knows what it will be.Back at it... still working at it.ShellEverybody is so tight lipped, that it's somewhat disquieting, like the calm before the storm.Hopefully these happenings include EagleWorks proving their point to the NASA's internal review boards, and getting more appropriate funding, which could result in a news-worthy paper by end of the year.Or maybe Dr. Tajmar and his diligent Ph.D. students have continued doing experiments, with much better results by now.Well, that's maybe just me and my child-like desires to see this work, but this calm is indeed odd.
Quote from: rfmwguy on 10/08/2015 10:54 pm500 Downloads on the NSF-1701 Phase I Test Report from this thread and last.Moral of the story...people are still interested in the emdrive concept and they are starving for information.Does not look like Cannae, Tajmar, Shawyer or Yang have anything new to report. Still have hopes that EW is busy at it from the rumors I heard last year.If anybody else finds anything out there, be sure to post it here.Haven't heard much from this side other than rumors that something might be happening. Who knows what it will be.Back at it... still working at it.Shell
500 Downloads on the NSF-1701 Phase I Test Report from this thread and last.Moral of the story...people are still interested in the emdrive concept and they are starving for information.Does not look like Cannae, Tajmar, Shawyer or Yang have anything new to report. Still have hopes that EW is busy at it from the rumors I heard last year.If anybody else finds anything out there, be sure to post it here.
It is funny, isn't it? Have to think that a "breakthrough" in determining this whole thing were measurement or system error would have hit the boards long ago, but they have not. And this is from labs that have a reputation for doing so.Consider the quiet experimental labs that are likely hoping to disprove this thing and become the first to lay it to rest. Silence. And I don't think its becaused no one tried.Calm before the storm, indeed Shell
For Inquiring Minds Who Want To Know.Some building pictures, took the time to upload and write about each step.http://s1039.photobucket.com/user/shells2bells2002/library/CE%20Electromagnetic%20Reaction%20Thruster?sort=2&page=1
So, I just had a ton of fun trolling on reddit. But in all seriousness I respect what all DIY builders are doing. I would never troll this thread. Ever. I completely hate reddit.
Quote from: Blaine on 10/09/2015 02:35 amSo, I just had a ton of fun trolling on reddit. But in all seriousness I respect what all DIY builders are doing. I would never troll this thread. Ever. I completely hate reddit.Several active users of NSF, including RFMWguy and SeaShells, are active and positive contributors to the EM Drive Subreddit, which is a real and significant part of the community of interested researchers and bystanders. You do us all a disservice by trolling the other, interested parties out of spite for their host.
...Have offered to share with EWs, all the details of the narrow bandwidth 2.45ghz spherical end plate EMDrive design that Roger and I developed. Once their current dielectric based copper frustum is working well enough in vac for Glenn tests, Paul may have enough time to engage this build and do the testing. Predicted Force at 100W is 50 - 100mN (0.5-1.0N/kW)My goal here is simple. Get Our Butts To Mars.
Quote from: TheTraveller on 10/09/2015 12:37 am...Have offered to share with EWs, all the details of the narrow bandwidth 2.45ghz spherical end plate EMDrive design that Roger and I developed. Once their current dielectric based copper frustum is working well enough in vac for Glenn tests, Paul may have enough time to engage this build and do the testing. Predicted Force at 100W is 50 - 100mN (0.5-1.0N/kW)My goal here is simple. Get Our Butts To Mars.100mN is better than the best ion thruster (92mN). I build space systems with 50A@172VDC switches - there are 50A@250VDC solid state switches out there off the shelf. If we can really talk about 12N of thrust per switched service(12.5Kw) with non-superconducting frustrums Mars gets easy and Titan becomes possible. With a super conducting system? Heck, Alpha Centauri may become possible.Additionally every satellite built today that has more than a very short life uses both reaction wheels that wear out and thrusters that use propellant that gets used up. To replace both requires probably at least 4 EM drives per satellite (yaw,pitch,roll,thrust) and probably a second set for redundancy.To say that this is a potential $Billion business is not exaggerating.
NSF-1701 Phase II Testing Update - Donations have allowed me to upgrade the PC and get a Spec An module for it. Also ordered another identical magnetron to start modifications for cleaner signals...thus the spec an.The freq control will be more difficult that I envisioned, so I won't be taking several months off this fall...significant challenges lay ahead to be able to vary the ctr freq +/- 40 Mhz...Also have to design a feedback system to denote resonance. Thought about this alot. Going back to my old tube days, dip the plate current for resonance...not sure if this will work for mags however, they are strange animals.
Thermoelectric coolingWhy not to try to use a thermoelectric cooling module attached to the magnetron to remove part of its dissipated power. Cf https://en.wikipedia.org/wiki/Thermoelectric_cooling
Quote from: rfmwguy on 10/09/2015 03:43 pmNSF-1701 Phase II Testing Update - Donations have allowed me to upgrade the PC and get a Spec An module for it. Also ordered another identical magnetron to start modifications for cleaner signals...thus the spec an.The freq control will be more difficult that I envisioned, so I won't be taking several months off this fall...significant challenges lay ahead to be able to vary the ctr freq +/- 40 Mhz...Also have to design a feedback system to denote resonance. Thought about this alot. Going back to my old tube days, dip the plate current for resonance...not sure if this will work for mags however, they are strange animals.Dave, Shell, The Traveler & Crew:It's been awhile since I last posted on this forum and sadly I still can't say anything about what is going on in the Eagleworks (EW) Lab other than Dr. White & I continue to work on testing Q-Thrusters and delving into the science behind them, within the constraints of a still VERY limited budget.Now to the main reason for this post. After reading through the last few pages of this latest version of the NSF.com/EM-Drive forum, some of you might find interesting the following microwave RF source data. I've run across several papers over the last few months on how to make the magnetron from a kitchen microwave oven into a frequency tunable, narrow-band, and stable RF source with very low phase noise, just right for the kind of work that Dave, Shell and The Traveler are performing, or will be performing on these EM-Drive thrusters. These cross-field magnetron design modifications are authored by an RF engineer by the name of Bill Brown who died in 1999, (See: https://en.wikipedia.org/wiki/William_C._Brown ), and their simplicity and elegance are still striking, at least to me. In the hope that these papers have not already been posted elsewhere in these EM-Drive threads, or as a reminder to all if they have, find them attached.BTW, Mr. Brown's phase-controlled, frequency-tunable magnetron design, using feedback from a sense antenna in the frustum, only has a frequency tuning range of ~15MHz as currently designed, so Dave D. will have to use a hybrid mechanical/electrical tuning system for his frustum to obtain his desired +/-40MHz tuning range. Or Dave could increase the magnetic-field output in the magnetron's B-field Buck-Boost coil used in Brown's design by increasing its driven current range, which might get the increased frequency range Dave needs. Best of luck to all your efforts and keep up the good work! Paul March, Friendswood, TX
Hey everyone,Papers have been published, the first details our investigation, the second outlines our newest proposal, and the third discusses the previous experiments. (The third hasn't changed much and could use more updating)You can find them all on my linkedin: https://www.linkedin.com/in/kurtwadezellerOr I'll attach a download link for those that don't have a linkedin account.-Kurt