The Turnaround 325 is a 43 1/2â€ span model capable of performing classic aerobatic maneuvers, designed by Paul Bradley. It is not designed for 3D aerobatics. When finished, the model flying weight should be in the 26 to 29 oz. range. The recommended power set up is a three cell LiPo in the 22 mAh range, and a motor like the HiMax 2816-0890 turning a 10 x 7 electric prop. When selecting a motor, use one that has a diameter of 28 mm and a length of 33 mm. Such motors will weigh about 75 grams. Slightly larger motors (35mm diameter and larger) will fit but will be heavier and may require ballast on the tail to achieve the correct CG location.