Artillerie Antiaérienne US en 1942 à Los Angeles

Canon AA 3"....M1917

3-Inch Antiaircraft Gun Facts

Firing Table Muzzle Velocity: 2,700 feet/second

Breech: Semi-automatic

Maximum Rate of Fire: 25 rounds/minute

Elevation Limits: -5º to 85º (later mounts)

Recoil Type: Hydro-spring

Fire Control Director: M4 or M7 (earlier M1, M2 and M3 could be substituted)

Maximum Effective Slant Range: 9,500 yards

Maximum Effective Horizontal Range: 10,500 yards

Maximum Effective Vertical Range: 10,100 yards

Maximum Effective Fire Control Altitude: 25,000 feet



Actual muzzle velocity was dependent on ammunition used and environmental conditions. Maximum range was limited by a 30-second timed fuze.


Munition 3" type Sharpnell...




Position des defense cotières





Equipement des positions cotières
The Harbor Defenses of Los Angeles

Bolsa Chica Military Reservation /north of Huntington Beach /private, state reserve /K
#128/2-16"/CBC/1944 NC /destroyed
Harrison (#242) /2- 6"/SBC/1944-1948/destroyed
unnamed/2-155 mm/PM/1942/

FORT MacARTHUR (Upper & Lower ) /San Pedro/ 1885-1975/ Air Force housing, city park /(M)/ KKKK
Osgood/1/14"/DC/1917-1944 / gun remodeled 1923, battery being restored
Farley/1/14"/DC/1917-1944
Leary/1/14"/DC/1917-1944/converted to HECP, 1944
Merriam/1/14"/DC/1917-1944/converted to HECP, 1944
"Erwin"/2/14"/RY/1926-1946/1 empl. L.R. (covered), 2 empl. L.R. (dest)
Barlow/4/12"/M/1917-1944
Saxton/4/12"/M/1917-1944
#241/2/ 6"/SBC/1948-1956/armed post-war, Generators still in place
JAAN #1/2/ 3"/P/1942-1946/L. R. (Cabrillo Beach), guns from Lodor
AMTB Gaffey Bulge/2/90 mm/F/1943-1946
AMTB Navy Field/2/90 mm/F/1943-1946/L. R., buried?
unnamed/2/155 mm/PM/1942

White Point Military Reservation /San Pedro /Air Force housing, city property /KK
Bunker (#127)/2/16"/CBC/1944-1948/

Long Point Military Reservation /Pt. Vicente (Rancho Palos Verdes) city park /KK
Barnes (#240) /2/ 6"/SBC/1944-195?/Pt. Vicente
unnamed/2/155 mm/PM/1942/Long Point, dest.

Other locations
"Eubanks"/2/ 8"/RY/1942-1945/Manhattan Beach, destroyed
Lodor/4/ 3"/P/1919-1927/Deadman's Island, destroyed
JAAN #2/2/ 3"/P/1942-1946/Bluff Park, Long Beach, guns from Lodor
AMTB Terminal Is./2/90 mm/F/1943-1946/Terminal Island, covered
AMTB Bluff Park/2/90 mm/F/1943-1946/Bluff Park, Long Beach, buried?
unnamed/3/155 mm/PM/1942/Costa Mesa (only two guns assigned), dest
unnamed/3/155 mm/PM/1942/Rocky Point (only two guns assigned), dest
unnamed/2/155 mm/PM/1942/El Segundo/Hyperion, orig 2 6-in NP, dest.
unnamed/2/155 mm/PM/1942/Playa Del Rey, destoyed
unnamed/2/155 mm/PM/1942/Pacific Palisades, destroyed
unnamed/2/155 mm/PM/1942/Port Hueneme, buried/destroyed
unnamed/2/155 mm/PM/1942/Oxnard, destroyed
unnamed/2/155 mm/PM/1942/Ventura, in surf 1992
unnamed/2/155 mm/PM/1942/Santa Barbara, destroyed/