Hovering requires the most power/weight and is the most stress on an engine,the Sa82 wont cut it for that,but will fly the plane and do anything that doesnt require more thrust than the weight of the plane,the 60 UCD comes in somewhere between 7.5 to 8.5 lbs. The engine size on the instructions is best if this is only your second or third plane,if you have a lot of building and flying experience you could opt for a larger engine but might have to make some modifications for the airframe to hold up to extra stress.