Centre of Gravity Gauge 693054If a model is to fly satisfactorily its longitudinal dihedral must be correct, and its flying surfaces warp free; the final factor is that its CG must also be right. Guessing the balance point, e. g. using your fingertips, can lead to innumerable unnecessary test flights or in the worst case to an immediate crash. The plan or building instructions usually state the CG position, but how should it be transferred accurately to the model? This problem is