Burrill Thrust-Loading Coefficient τ_c
Thrust-loading coefficient τ_c for propeller back cavitation assessment per Burrill 1943 chart - screens whether back cavitation area is acceptable.
Cavitation number σ_0.7R
0.221 -
Thrust-loading coefficient τ_c
0.041 -
Status
Safe region
Formula, assumptions, and limits
Burrill's original chart plots τ_c vs σ_0.7R with curves for 2.5 %, 5 %, 10 % back cavitation. Target ≤ 5 % on merchant propellers.
Symbol legend
| Symbol | Meaning | Unit | Source |
|---|---|---|---|
| Propeller thrust | N | powering study | |
| Tip speed | m/s | πDn | |
| Projected blade area | m² | propeller drawing |