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Destroyer Boulonnais (1,500 tonnes class)
in June 1939
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Destroyer Boulonnais (1,500 tonnes class)
in June 1939
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| Designation | 130 mm/40 (5.1") Model 1924 |
| Ship Class Used On | L'Alcyon (1,500 tonnes) class |
| Date Of Design | 1924 |
| Date In Service | 1927 |
| Gun Weight | 3.75 tons (3.81 mt) |
| Gun Length oa | 212.1 in (5.387 m) |
| Bore Length | 204.7 in (5.200 m) |
| Rifling Length | N/A |
| Grooves | N/A |
| Lands | N/A |
| Twist | N/A |
| Chamber Volume | N/A |
| Rate Of Fire | 5 - 6 rounds per minute |
| Type | Separate |
| Projectile Types and Weights
(see Note) |
HE - 76.83 lbs. (34.85 kg)
SAP - 70.4 lbs. (32 kg) |
| Bursting Charge | SAP - about 4 lbs. (1.8 kg)
HE - about 8 lbs (3.6 kg) |
| Projectile Length | about 25.6 in (65 cm) |
| Propellant Charge | 17 lbs. (7.7 kg) BM9
Cartridge - 38.6 lbs. (17.5 kg) |
| Muzzle Velocity | 2,379 fps (725 mps) |
| Working Pressure | 16.3 tons/in2 (2,570 kg/cm2) |
| Approximate Barrel Life | N/A |
| Ammunition stowage per gun | N/A |
| Note: There were several types of SAP shells issued. The figure above represents an average weight of these projectiles. | |
| Elevation | With 76.83 lbs. (34.85 kg) HE Shell |
| Range @ 35 degrees | 20,450 yards (18,700 m) |
| Range |
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| 10,936 yards (10,000 m) |
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| Note: Data from "Destroyers of World War Two." | ||
| Designation | Single Splinter Shielded Mounts
L'Alcyon (4) |
| Weight | 12.5 tons (12.7 mt) |
| Elevation | -10 / +35 degrees |
| Rate of Elevation | Manually operated, only |
| Train | about +150 / -150 degrees |
| Rate of Train | Manually operated, only |
| Gun Recoil | 18 in (45 cm) |
| Loading Angle | Any (see note) |
| Note: Unlike the Model 1919, this weapon used a spring-powered rammer, but angles over 15 degrees made for difficult loading. | |