In addition to the angle of incidence and freedom from distortion, the center of gravity must be correct for the model to fly well. An inaccurate center of gravity adjustment, for example using fingertips, can lead to countless test flights or, in extreme cases, an immediate crash. Information about the center of gravity is usually found in the plan or instructions, but how can it be accurately transferred to the model? With the easy-to-assemble center of gravity scale, this is not a problem. It is designed for models weighing between 300 g and 10 kg. The measuring range is between 30 and 150 mm, meaning that for a rectangular wing without sweep, the wing depth can be up to approximately 450 mm, which is sufficient for all common models.