Agreed the largest added Q comes from super-cooling. I had asked about silver over copper as it is very simple and inexpensive to electroplate silver onto a copper EM Drive. Building a LN2 cooled EM Drive has all manner of engineering issues. Perhaps the 6% added thrust from silver plated copper is observable and sufficient to prove the Q effect. The next issue is what is the ideal microwave electronics and antennae design, as in what brand/model of microwave oven do I buy to cannibalize for parts.
-----Original Message----- From: mix...@bigpond.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 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 the cavity the Q of silver? Is there any potential for improved Q based on the design of the internal cavity antennae that emits the microwaves. The conductivity of silver relative to copper is not all that much, so I wouldn't expect much of a gain anyway. Far more gain should be obtained by cooling. According to Tesla, cooling with liquid nitrogen gives a 5 fold improvement. Regards, Robin van Spaandonk http://rvanspaa.freehostia.com/project.html
