RE: Bi-plane
RE: WM 40S
Most of the people who have posted here that it's a "handful" to fly seem to be using the wrong prop.
In other words the plane is brought in and flown too slowly, and tends to stall out on them.
Use an 11x6 on your .46 and you'll have no problems, although it will seem to approach a bit faster than what you may be used to.
That's ok, just keep it under a bit of power on landing.
Keep your throws to the suggested initially until you get used to how it handles.
For an Ultimate of such small size it flies very well and is fairly docile if not flown too slowly....
Stall it out on approach however and ....