Bell 20 / 31Ship's bell2022
Corrie
DWG 22-239Drawn from the working profile. Not to print scale.
01Bell details
A harbour bell rung by hand for the lifeboat. Left bright bronze at the owners' request; it will turn green on its own.
- Commission
- Harbour bell
- Place
- Harbour Office, Porthcarrow
- Inscription
- PORTHCARROW 2022
- Metal
- Bell metal, 78% copper, 22% tin
- Mould
- Loam, swept by strickle
- Tuning
- True-harmonic, five partials
02Tuning record2,800 Hz nominal
| Partial | Ratio | Measured | Off | Deviation |
|---|---|---|---|---|
| Hum | ·25 | 700 Hz | 0¢ | |
| Prime | ·5 | 1,396.8 Hz | -4¢ | |
| Tierce | ·6 | 1,680 Hz | 0¢ | |
| Quint | ·75 | 2,102.4 Hz | +2¢ | |
| Nominal | 1 | 2,800 Hz | 0¢ |
Ratios to the nominal. Cents are hundredths of a semitone; within ±6¢ most ears hear the bell as in tune.
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