I believe strongly that you can build this without power assist to the blades.
First of all, get yourself familiar with the RC groups gyro area. So when it is too windy or cold to fly, grab that beer and go thru the pages and pages dealing with the Apache autogyro. Look for designs dealing with 4 blades and a simple fuse.
Being a seasoned heli guy, this is what I first did after I built mine. This is half the battle in learning how to fly it. "Out of track" blades is a big problem.
I solved the problem as follows:
In the cellar, in a darken area, used a big box fan in front of "OTTO" gyro that is fixed in place, you get the Otto blades to turn and spin up. Being foam, they are out of track, so put red colored tip and black colored tip on opposite blades(that why 4) and using a florescent light bulb(pulses 60 cps and syncs in the dark) you can now see the red and black out of track(flapping hinges please,(try my design)). Now, add dab of glue at the blade end, spin again until you get in track. Add yellow and green color to other set of blades and get them to track. Now up speed of box fan, do a set of blades and now track the OTHER set to fine tune all blades for tracking. Again up box fan to top speed, and voila, all 4 blades will produce more lift and make OTTO more STABLE in flight.
1/2 the battle is over, Learning how to fly it takes a special knack. Dealing with torque, wind, angle of OTTO at all time is very important. Yes, you can loop OTTO with a nice headwind and height.
Will cover that later and will bring parts out of my cellar boneyard. Pics to follow.