Jester,
One of the biggest problems with the 3D planes on the market today is the way they are
marketed. They call planes in this size range 60-90 size, with that size engine the plane will
fly and do alot of basic aerobatics. Once the pilot goes 3D with the plane the engine requirements
increase. in the majority of the planes this size 67-70 inch wingspan and 8-9 lb weight. the three
most reccomended engines are the OS 1.20 AX, YS 110 FS, Saito 1.25 FS. these engines provide
enough thrust to weight ratio to perform a wide array of 3D maneuvers.

A rule of thumb is that on a good 3d setup the plane should settle into a hover at 1/2 throttle or a
bit more. This gives the pilot room to punch out when in trouble. But with all this power throttle control
becomes very important, as with the huge control surfaces on a 3D plane the possibility of flutter
at higher speeds becomes a real threat to the airframe.

Also basic 3D and all out 3d are the same beast and the requirements are all the same. the more power
you have for learning 3D the better.