FORCETALLY
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At a glance
3-inch/50-caliber gunlarger figure on 0 of 2
OTO Melara 76 mmlarger figure on 2 of 2
Counts only measures both sources give with the same scope. A larger figure is not a better system.
Measured figures
Mark 2
Single sourceMark 21
Single sourceConfiguration
| Specification | 3-inch/50-caliber gun | OTO Melara 76 mm |
|---|---|---|
| Crew | — | remote controlled[source] |
| Type | Naval gun[source] | Naval gun[source] |
| Place of origin | United States[source] | Italy[source] |
| In service | 1900–1990 (US Navy)[source] | 1964–present[source] |
Mark 2 : 153.8 inches (3.91 m) Mark 21 : 159.7 inches (4.06 m)[source]
Maximum; AA ceiling
Single sourceMaximum; at 43° elevation
Single source14,600 yd (13,400 m) at 43° elevation 30,400 ft (9,300 m) AA ceiling[source]
Maximum; HE-PFF
Single sourceMaximum; HE-PFF SAPOMER
Single sourceMark 2
Single sourceMark 22 with autoloader
Single sourceMark 2 : 15 – 20 rounds per minute Mark 22 : 45 – 50 rounds per minute with autoloader[source]
Compact
Single sourceSuper Rapid
Single sourceBars compare reported quantities only. A larger figure does not make a system better; configurations and test conditions differ.
| Used by | US Navy[source] | See operators[source] |
|---|
| Designed | Mark 2 : 1898 * Mark 10 : 1915 * Mark 22 : 1944[source] | Compact: 1963 Super Rapid: 1985 Strales: 2004[source] |
|---|
| Produced | 1900–1948[source] | Compact: 1964 Super Rapid: 1985 Strales: 2008[source] |
|---|
| Variants | Marks 2, 3, 5, 6, 8, 10, 17, 18, 19, 20, 21, and 22[source] | See variants[source] |
|---|
| Shell | complete round: 24 lb (11 kg); projectile weight: 13 lb (5.9 kg) projectile types: AP , AA (with VT proximity fuze), HE, Illumination[source] | 76×636mmR shell weight 6.3 kilograms (14 lb ) propellant weight 2.35 kilograms (5.2 lb )[source] |
|---|
| Elevation | Pedestal Mount : -10° to +15° AA Mount : -10° to +85°[source] | −15°/+85° speed: 35°/s (acceleration: 72°/s²)[source] |
|---|
| Traverse | 360°[source] | 360° speed: 60°/s (acceleration: 72°/s²)[source] |
|---|
| Sights | Peep-site and Optical telescope[source] | — |
|---|
| Designer | — | OTO Melara[source] |
|---|
| Manufacturer | — | Otobreda: 1963–2001 BHEL Haridwar : 1994–present (under licence) OTO Melara (subsidiary of Finmeccanica): 2001–2015 Leonardo-Finmeccanica : since 2016 Leonardo : since 2017[source] |
|---|
| Shell weight | — | 12.4 kg (27 lb)[source] |
|---|
| Feed system | — | Magazine capacity : 80 ready rounds on Compact gun mount[source] |
|---|
Maximum; HE-PFF VULCANO
Single sourceHE-PFF 16,000 m SAPOMER 20,000 m VULCANO 40,000 m[source]
Compact : 85 rounds/min Super Rapid : 120 rounds/min[source]