Mark you are nothing but a spin artist.

Supply me links to posts that I've made making any claims of best efficiency.

Basically my point about Par's Dynamax convertion is that it's well engineered, carefully assembled, and has been proven to do what no other 5" fan has been proven to do. Namely produce over 30lbs of thrust for a solid 1.5 minutes without any throttle management (full power) and do it without damaging the fan or motor.

You want to tell me a Ramtec has ever done that? How about BVM or Scheubler or even Jet Fan. Show me! Don't show me a spreadsheet of numbers. Don't tell me you saw it and there were lots of witnesses. Show me the video proof with real time data.

You can't do it, because there's no proof out there. If a company like those mentioned above had the goods, I guarantee you that there would be video, well documented video. Why? Because video is proof that it's not just BS.

BTW I think that the Jet Fan is a good product at a good price. But even the fan that they claim can "almost" do 30lbs of thrust at about 11kw has yet to be proven IMO. The 130mm is also going to naturally be a little more efficient than any 5" fan because it's slightly bigger and larger fans are always more efficient than smaller fans at the same thrust level.

So supply some proof that some fan from Europe is matching or beating Par's accomplishments with the Dynamax, or drop it.

Also, I think it's sad that you have to look to other fan manufacturers to find similar performance. I guess you blokes in Australia should get to work and develop the Ramtec to it's potential. Doesn't look like anyone else is going to do it for you.