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Italy 40 mm/70 (1.57") Breda

  • ️Tony DiGiulian
Breda 40 mm Compact

This weapon uses two OTOBreda 40 mm/L70 guns and is used on many types of warship from fast patrol boats to frigates.  In service in Italian, Argentine, South Korean and other navies.

Elevation:  -13 / +85 degrees
Elevation Rate:  60 degrees per second

Train:  360 degrees
Train Rate:  90 degrees per second

Working Circle:  114.3 in (2.902 m)

Total weight with / without ammunition Type A:  16,090 lbs. / 12,125 lbs. (7,300 kg / 5,500 kg)
Total weight with / without ammunition Type B:  13,890 lbs. / 11,680 lbs. (6,300 kg / 5,300 kg)

Gun Recoil:  9.8 in (25 cm)

Notes:

1) Type A mount has a 736 round magazine with deck penetration.  Type B mount has a 444 round magazine and no deck penetration.

2) Tests conducted by the Italian Navy in 1976 indicated this weapon had 30% chance of destroying an incoming sub-sonic missile outside of 900 meters (1,000 yards). 

Breda Twin Fast Forty

The successor to the Compact mount described above with dual ammunition feed and a higher rate of fire.

ROF:  450 rpm per gun - 900 rpm total per mount

Elevation: -13 / +85 degrees
Elevation Rate:  70 degrees per second

Train:  360 degrees
Train Rate:  100 degrees per second

Working Circle: 114.3 in (2.902 m)

Gun Recoil:  3.9 to 4.3 in (10 to 11 cm)

Notes: 

1) Dual feed mechanism to allow switch from PFHE to APFSDS rounds with two magazines per gun.  Type A mount has a total capacity of 736 HE round with deck penetration for the mount.  Type B mount has a total capacity of 444 HE round magazine and no deck penetration for the mount.  Both types have a 200 round APFSDS magazine in addition to the HE magazine.

2) OTOBreda claims that the twin Fast Forty using PFHE ammo can kill a supersonic missile at ranges up to 3,000 meters (3,280 yards).  If a missile gets to within 1,000 meters (1,100 yards) the the weapon automatically switches from the PFHE to the APFSDS magazine. 

Breda Single Fast Forty

A single version of the Twin Fast Forty with similar specifications.

There are three versions of mounting for this weapon:
Type A is remotely controlled.  Weight 9,590 lbs. (4,350 kg) including ammunition.
Type B has a simple on-mount sighting system.  Weight 10,030 lbs. (4,550 kg) including ammunition.
Type C has a computerized FCS with on-mount TV tracker and laser rangefinder.  Weight 10,140 lbs. (4,600 kg) including ammunition.

All versions fire at 450 rpm and feature dual feed with two 42 round magazines and 5 rounds in the gun feeder.

Elevation: -13 / +83 degrees
Elevation Rate:  75 degrees per second

Gun Recoil:  3.9 to 4.3 in (10 to 11 cm)

Training:  360 degrees
Train Rate:  130 degrees per second

Breda Type 106 Twin 40 mm/L70

An earlier open topped twin 40 mm mount served from a 32 round autofeeder magazine that elevates with the gun or loaded from the standard four-round clip.  Production started in 1969.  These mounts were retrofitted to the German Hamburg class destroyers.

Elevation: -13 / +85 degrees
Elevation Rate:  95 degrees per second

Train:  360 degrees
Train Rate:  95 degrees per second

Weight:  14,350 lbs. (6,510 kg) without ammunition plus 220 lbs. (100 kg) for battery

Gun Recoil:  9.8 in (25 cm)

ROF:  Probably 240 RPM

Breda Type 107 Single 40 mm/L70

A single version of the Type 106.  Data as for that weapon except weight as noted below.  Also uses the 32 round autofeeder.

Weight:  7,960 lbs. (3,610 kg) without ammunition plus 220 lbs. (100 kg) for a battery

Breda Type 64

Twin mount with a 100 round magazine per gun.

Weight:  17,420 lbs. (7,900 kg) without ammunition plus 330 lbs. (150 kg) for a battery

Train rate: 85 degrees per second
Elevation rate:  95 degrees per second

ROF:  Probably 240 RPM

Breda Type 520R

Advanced version of Bofors 40L70 Naval Gun with 144 ready rounds, digital servos and a fiberglass cupola.  Available in both remotely controlled unmanned and single operator manned versions.

Elevation: -9 / +83 degrees
Elevation Rate:  44 degrees per second

Train:  360 degrees
Train Rate:  135 degrees per second

Weight:  8,700 lbs. (3,950 kg)

ROF:  300 RPM

Breda Type 564

A single 40 mm/L70 using a 144 round Model 1971 automatic magazine.  Crew is normally two on mount with one on standby, but some versions can be operated by a single operator.  Marketed as the Breda/Bofors 350P and is analogous to the Bofors SAK 350 model.  Also produced under license in Spain.

Weight:  7,275 lbs. (3,300 kg) without ammunition plus 220 lbs. (100 kg) for a battery

Elevation:  -10 / +90 degrees
Elevation Rate:  45 degrees per second

Train:  360 degrees 
Train Rate:  80 degrees per second 

Rate of fire:  240 rpm