Aero Fact: Propeller Tip Speed
High tip Mach increases noise and compressibility losses; diameter and RPM set limits for efficiency.
By AircoreDynamics •
•
1 min read
Definition: Higher tip Mach increases noise and compressibility losses; diameter and RPM set constraints.
Physics insight: M_tip ≈ (π D n)/a component dominates; compressibility losses grow with M_tip.
Example: High-speed turboprops enforce RPM limits to control noise/efficiency.
M_tip ≈ (π D n)/a
Rules of thumb: Reduce RPM in cruise; optimize blade pitch.
Common pitfalls: Ignoring structural and vibration limits.
References: Aeroacoustics references