Free RC design tools

Calculators for RC planes, drones and VTOLs: foam, balsa, fabric, fiberglass, carbon or 3D-printed. Save your CG setups in My hangar.

Balance point, neutral point and static margin for any RC plane, with a 3-view drawing and a battery-position helper.

Endurance and range from weight, props and battery, with hover and cruise power.

Wing loading, stall and landing speed, and whether your weight is normal for your build.

Voltage, capacity, energy, weight and safe current for any S and P pack.

CG calculator by layout