Tintrax,

I have built a regular front engined wingless autogyro with a 2 blade rotor. It flew almost the same than the 3 blade version. However I have not flew much so I can't say it for sure. I tried both methods on the same autogyro. I have pics about the 2 blade version and some new pics about it with the new hub. [link=http://www.kemi.fi/kk019065/models/gyro2/index.html]Those [/link]can be found on my homepage.

There was long http://www.geocities.jp/radjpn/video/hasumi_for_net.mpg video about the ARF-model. It seemed to fly really well. I was impressed with slow flying shown on the video.