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At a glance
M39 cannonlarger figure on 1 of 3
Measured figures
Length
Single source1.83 m[source]
Length
Single sourceConfiguration
| Specification | M39 cannon | Santa Bárbara Sistemas 155/52 |
|---|---|---|
| Type | Single-barrel autocannon[source] | Howitzer[source] |
| Place of origin | United States[source] | Spain[source] |
| In service | 1952–present[source] | 2002–present[source] |
| Designer | Ford Motor Company[source] | — |
Santa Bárbara Sistemas 155/52larger figure on 2 of 3
Counts only measures both sources give with the same scope. A larger figure is not a better system.
10.3 m (33 ft 10 in)[source]
Maximum; Maximum speed
Single source18 km/h (11 mph)[source]
Diesel APU
Single sourceDiesel APU 106 hp (79 kW )[source]
Muzzle velocity
Single source1,030 m/s (3,300 ft/s)[source]
L/52
Single source8.12 m (26 ft 8 in) L/52[source]
Bars compare reported quantities only. A larger figure does not make a system better; configurations and test conditions differ.
| Designed |
|---|
1951[source] |
| — |
| Manufacturer | Pontiac, Ford, FMC Corporation, and others[source] | — |
|---|
| No. built | 35,500+[source] | 111[source] |
|---|
| Variants | M39, M39A1, M39A2, M39A3[source] | — |
|---|
| Cartridge | 20×102mm[source] | — |
|---|
| Barrels | Single barrel (progressive RH parabolic twist, 9 grooves)[source] | — |
|---|
| Action | five-chamber revolver[source] | Hydraulic loader[source] |
|---|
| Used by | — | Colombia Spain El Salvador[source] |
|---|
| Shell | — | Separate loading charge and projectiles[source] |
|---|
| Breech | — | Interrupted screw[source] |
|---|
| Recoil | — | Hydro-pneumatic[source] |
|---|
| Carriage | — | Split trail[source] |
|---|
| Elevation | — | −3° to +72°[source] |
|---|
| Traverse | — | 40°[source] |
|---|