My first post, so hello to everyone.
I have been into RC flight for many years, and always wanted to build and fly an autogyro but never got round to it until recently.
Wish I had started sooner! I began with a simple and stable twin rotor design (Twirl) made from 3mm depron, and never had so much fun from RC flight before.
Reading through the forum, I am impressed by the experimental spirit shown by you all, especially the stabiliser - less designs from Mickey. Rotor heads are so intriguing, but also so frustrating to fully understand, nevertheless my next project will be a single rotor model (electric).
Just when I thought that I understood that you either needed either a flex hub or the helicopter style head with cyclic control, I came across this... [link]http://www.prachapter34.com/toppage10.htm[/link] I refer to the model with the box fuselage and machined rotor head. Looks like it uses 2 servos in a mixer arrangement for direct head control, but no flexing or cyclic control to be seen. A close up of the rotor head can be seen further down the page.
Will someone with more knowledge than me please tell me how this model can attain stable flight?

John - Norfolk, England