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| C | coefficient |
| c | chord |
| dP | differential pressure |
| F | force |
| K | average wing pressure normalised by density and angular velocity |
| k | point pressure normalised by density and angular velocity |
| M2 | second moment of wing mass (moment of inertia) |
| Q | torque |
| R | wing length |
| r | radius from centre of rotation |
| S | area |
| S2 | second moment of wing area |
| S3 | third moment of wing area |
| V | speed |
| α | geometric angle of attack |
| ρ | air density |
| Ω | angular velocity |
