geoharry-RCU
I love my UCD 60 also and you're right it does threaten to snap out of a harrier. Its more of a rollover than a violent snap. That really gave me a jolt when it happened at a lower altitude. I can hold it as long as I'm in a slow decent but once I try to maintain a constant altitude I lose it. That could be due to fact that I'm and old flier learning new tricks.
As you said "the only thing that works is really high alpha", but then thats like drifting it around the sky in a near hover.
The UCD 46 actually does harrier, does great blenders and waterfalls and strangely enough is easier to hover. I have more flying time on the UCD 46. But then, maybe thats why I have more flying time on it.
My UCD 60 has been reconfigured for the upcoming flying season. I replaced the OS 91FX with a new Saito 100 with right and down thrust and put a heavier battery in the tail. My battery is inside a hatch in the bottom of the fuselage 29.5 inches back from the wing leading edge. The CG is 5.75 inches back from the leading edge. I also installed a new Futaba 8-channel receiver so I can use the ailevator feature for the two elevator servos and get rid of the "Y" reverser. Increased the elevator high rate too. We'll see what surprises these changes bring.