R Shawyer of SPR Ltd : A short presentation on Third Generation EmDrive

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    • R Shawyer of SPR Ltd : A short presentation on Third Generation EmDrive

      Roger Shawyer published a presentation of 3rd Gen Emdrive
      emdrive.com/3GEmDrive.pdf



      Roger Shawyer wrote:

      Third Generation EmDrive
      Roger Shawyer - July 2017

      EmDrive Development Phases


      • First Generation. Original low thrust technology for in-orbit satellite applications. Reported to be operational in US and China.
      • Second Generation. High thrust, low acceleration, superconducting technology. Space and Marine applications. Under development in UK and US.
      • Third Generation. High thrust. High acceleration, superconducting technology. Theoretical work reported in US, China and UK. Aerospace applications including Launch Vehicles and Personal Air Vehicles.
      3G EmDrive Theory
      High Q superconducting cavities are subject to large Doppler Shifts when accelerated.This can lead to the internal frequency being shifted outside the resonant bandwidth of the cavity over thetime constant of the cavity.
      ...

      3G Launch Vehicle Demonstrator
      Propulsion is based on a quadthrust platform, common to anumber of aerospace applications.
      Mass 701kg
      DimensionsL3.0m x W3.0m x H3.8m
      8 Flight Thrusters
      VTOLLauncher provides launch to LEO,one orbit, and return to site
      Payload 100kg
      Altitude 250km
      Velocity 7.8km/s
      Reported by E-cat world too
      e-catworld.com/2017/08/09/roge…rs-personal-air-vehicles/
      “Only puny secrets need keeping. The biggest secrets are kept by public incredulity.” (Marshall McLuhan)
      See my raw tech-watch on scoop.it/u/alain-coetmeur & twitter.com/alain_co
    • IBTimes publishes an article about that presentation with inetresting analys about the design behing that new generation


      Mary-Ann Russon wrote:

      ...

      However, although the second generation of the EmDrive can theoretically produce 3 tonnes of thrust for 1 kilowatt of power, it isn't able to move very far, so it is only useful for marine applications or for diverting asteroids, like in the new CBS sci-fi TV drama Salvation.
      Shawyer has long said that his aim for inventing the EmDrive was to help get satellites into space cheaply, to enable more applications and new ways for the human race to combat global warming and the energy crisis. Essentially, the EmDrive needs to be able to move and work as well as a conventional rocket, in order to be a viable solution.
      To negate these shortfalls, Shawyer's firm Satellite Propulsion Research Ltd (SPR) has also been researching a third generation of the EmDrive, which solved the acceleration problem by reducing the specific thrust.

      So instead of getting 3 tonnes of thrust for every kilowatt, substantially less thrust is produced – but it can be used to accelerate the device (more about this theory can be read in a paper Shawyer presented in Beijing in 2013).
      ....
      There is much more in the article to read, like targets to reusable vehicles, use in urban zone...
      Well informed, true journalism. :thumbsup:
      “Only puny secrets need keeping. The biggest secrets are kept by public incredulity.” (Marshall McLuhan)
      See my raw tech-watch on scoop.it/u/alain-coetmeur & twitter.com/alain_co