Well I am glad to see so many people weighing in on this. Like I expected the opinions range from it would fly scale to take a wheelbarrow along. The manufacturer,

http://www.eurekaaircraft.com/airpla...llenger-II.htm

reccomends 4.4cu and up. In emails to him though he has stated flying one of these with a G-62 and it was right about scale. If you guys haven't checked out Tuckers' web site you should. The video there is really good and you can change views from inside the plane to out.

http://www.oracle.com/cluboracle/teamoracle/index.html

During his torque roll he is at full power and sliding backwards. It is almost impossible to know how close he is to 1:1. I emailed him before to check if his color scheme will be the same next year and he got back to me the next day. He said he never knows for sure if Oracle will reup untill the new year. I wounder how much he would actually tell about the plane? I could try.