Prof. Cromwell Product Engineering Specification Sheet for Airplane Materials Planes Wing Area Min: 750 cm Max: 3500 cm CD Min: 0.2 Max: 0.5 Wing Dimensions Mass of Plane Min span: 50 cm Min chord: 15 cm m (g) = 0.25*Wing Area C = CD + 0.1*VAR Volts 2-cell, 7.4 Vo 3-cell, 11.1 Vo 4-cell, 14.8 Vo Diameter Min: 4 in Max: 13 in Batteries Capacity Min: 500 mAh Max: 5000 mAh Mass of Battery m (g) = (Vo*Capacity)/130 Diameter > Pitch Propellers Pitch Min: 3 in Max: 7.5 in Motors kV Rating Min: 500 kV Max: 2500 kV Mass: 40 g Mass of Propeller m (g) = 1*Diameter. Efficiency Rating eff 1.10-3.0E-2*d - 1.1E-4*kV - 7.0E-6*d*kV