Tools

Model Balance Bench

A workshop aid that estimates whether your model is nose-heavy, tail-heavy or near neutral.

Model parameters

Total mass

Total model mass including battery and gear.CG position

Measured from the datum (typically the wing leading edge).Support point

Position of your fingers or the balance stand.Model length (optional)

Helps the diagram scale and flag unrealistic values.Ballast mass (optional)

Ballast position

ƒarm = CG minus support; sign of the arm sets the tendency; ballast is averaged into the effective CG.

Result interpretation

Near-neutralArm (CG to support): +2 mm

Total mass

220 g

Arm (CG to support)

+2 mm

Tendency indicator

440 g·mm

Reason: Balance is close to the support point; no clear tendency.

Suggested next step: Good starting point, confirm it with a safe hand glide.

⚠A simplified educational tool. It only shows the geometric tendency around the support point and does not replace test glides or safe flight trials.