In aircraft design, wooden propeller blades can be used in the construction of propellers. The formula used to calculate various parameters related to wooden propeller blades is similar to that of other types of propellers, such as metal or composite blades. One key parameter of interest is the critical speed of rotation to avoid structural failures.
The critical speed of rotation (Nc) for wooden propeller blades is determined by the following formula:
- Nc is the critical speed of rotation in revolutions per minute (RPM).
- π (pi) is approximately 3.14159.
- E is the modulus of elasticity of the wood material used for the blades (in pascals, Pa).
- ρ (rho) is the density of the wood material (in kilograms per cubic meter, kg/m³).
- L is the length of the wooden propeller blade (in meters, m).