Artillery Fuzes
AM111 Mortar Point-Detonating (PD) Fuze
Fuze Data:
- Caliber:
60/81/120 mm smoothbore mortar- Weight:
375 g- Length:
87.6 mm- Diameter (max):
50.0 mm- Operating modes:
PD-Super-Quick (SQ), PD-Delay
Performance:
- Arming setback:
> 650 g- Arming airflow:
> 60 m/s- Max setback:
<20,000 g- Operating Temperature:
-46 °C to +63 °C
Overview:
AM784 Mortar Electronic Time (ET) Fuze
Fuze Data:
- Caliber:
60/81/120 mm smoothbore mortar- Weight:
375 g- Length:
91.4 mm- Diameter (max):
50.0 mm- Operating modes:
Time, PD
Performance:
- Time of flight:
<100 sec- Timer setting:
0.1 sec steps- Timer accuracy:
1.10E-3 msec- Arming setback:
> 650 g- Arming airflow:
> 60 m/s- Max setback:
<20,000 g- Operating Temperature:
-46 °C to +63 °C
Overview: The AM784 is an inductive settable electronic time fuze designed to be used with 60 mm, 81 mm, and 120 mm smoothbore mortar projectiles including both high explosive and cargo munitions. The fuze consists of a programming coil, a turbine generator with a ram aiflow driven turbine driving a miniature generator through a reduction gearbox, twin electronic timers, impact switch, electronic safe and arm device (ESAD), and expulsion charge. The AM-784 fuze has two independent timer mechanisms and can be set from 5.0 to 199.9 seconds in 0.1 second increments. The fuze has two arming mechanisms which require a setback acceleration of greater than 650 gs and a sustained airflow of at least 60 m/s to arm the fuze.
AM787 Mortar Multi-Mode Fuze
Fuze Data:
- Caliber:
60/81/120 mm smoothbore mortar- Weight:
300 g- Length:
95.5 mm- Diameter (max):
51.0 mm- Operating modes:
Proximity, PD-Super-Quick (SQ), PD-Delay,
Performance:
- Arming setback:
> 650 g- Arming airflow:
> 60 m/s- Max setback:
<20,000 g- Operating Temperature:
-46 °C to +63 °C
Overview: The AM787 is a multi-mode fuze for 60 mm, 81 mm, and 120 mm smoothbore mortar projectiles. The AM-787 employs a frequency-modulated continuous-wave (FMCW) proximity fuze using a gallium arsenide (GaAs) RF transmitter which acts as a doppler radar proximity sensor with two selectable height-of-burst settings. For safety the AM-787 fuze has two arming mechanisms which require a setback acceleration of greater than 650 gs and a sustained airflow of at least 60 m/s to arm the fuze. Operating modes of the AM-787 fuze are as follows:
- Proximity high: 4.0 m
- Proximity low: 2.5 m
- Point Detonating-Superquick (<250 µs)
- Point Detonating-Delay (50 to 150 ms)
AM371 Concrete Penetrating (CP) Fuze
Fuze Data:
- Caliber:
105/155/203 mm rifled gun- Weight:
640 g- Length:
124.9 mm- Diameter (max):
61.2 mm- Operating modes:
PD-Delay
Performance:
- Arming setback:
>1,500 g- Max setback:
<30,000 g- Arming rotation:
>3,000 rpm- Max rotation:
<25,000 rpm- Operating Temperature:
-46 °C to +63 °C
Overview:The AM371 is a point detonating fuze designed specifically for use against reinforced concrete targets. The the fuze is constructed from heat treated 4140 steel with a reinforced ogival nose plug hardened to to 340 BNH used to aid in penetration of hardened concrete targets. The base plug of the fuze contains the threads to screw the fuze into the nose threads of the shell body. The delay assembly is threaded into a cavity at the base of the base plug and consists of a firing pin and an inertial-type delay plunger mechanism with a detonator contained in an eccentric, spin-activated rotor. The delay element results in detonation 10 to 20 ms after impact, allowing the shell to penetrate into reinforced targets before exploding. The booster charge is threaded into the back of the base plug and consists of 22 grams of composition A5 (99% RDX coated with 10-% stearic acid).
AM522 Electronic Time (ET) Fuze
Fuze Data:
- Caliber:
105/155/203 mm rifled gun- Weight:
500 g- Length:
133.9 mm- Diameter (max):
61.2 mm- Operating modes:
Time, PD
Performance:
- Time of flight:
<200 sec- Timer setting:
0.1 sec steps- Timer accuracy:
1.10E-3 msec- Arming setback:
>1,500 g- Max setback:
<30,000 g- Arming rotation:
>3,000 rpm- Max rotation:
<25,000 rpm- Operating Temperature:
-46 °C to +63 °C
Overview: The AM522 is an inductively set electronic time fuze designed for 105mm, 155mm, and 203mm caliber smoke, illuminating, and cargo projectiles. The fuze can be set from 2 to 199.9 seconds in 0.1 second increments either electronically during loading or manually before loading using a fuze setting device. After programming and firing the fuze will activate at the set time and set off an expulsion charge which ejects the payload from the shell body. The time setting can be programmed an unlimited number of times before firing and is stored permanently until changed or fired. While designed for illumination, smoke, and cluster shells the fuze is also compatible with standard high-explosive rounds and features a point-detonating setting in addition to the standard electronic time setting.
AM782 MMAF (Multi-Mode Artillery Fuze)
Fuze Data:
- Caliber:
105/155/203 mm rifled gun- Weight:
800 g- Length:
151.6 mm- Diameter (max):
61.2 mm- Operating modes:
Time, PD-Super-Quick (SQ), PD-Delay, Proximity
Performance:
- Arming setback:
>1,500 g- Max setback:
<30,000 g- Arming rotation:
>3,000 rpm- Max rotation:
<25,000 rpm- Operating Temperature:
-46 °C to +63 °C
Overview: The AM782 is an inductively programmable multi-mode fuze designed for 105mm, 120mm, and 155mm caliber high-explosive projectiles. The fuze combines proximity, point detonating, post-impact delay, and electronic time settings which can pre-set by the user before firing or set electronically during the projectile loading process. The fuze contains an integral radar proximity sensor to provide accurate height-of-burst capability and is enclosed in a hardened maraging steel body to ensure high reliability when used in the post-impact delay mode against concrete or other hardened structures. The fuze is armed by the rotational and setback forces of firing with the fuze rotor only moving in-line after the projectile has cleared a preset muzzle safety distance. Operating modes of the AM782 fuze are as follows:
- Proximity high: 12 m
- Proximity low: 6 m
- Time: 2-199.9 sec (0.1 sec intervals)
- Point Detonating-Superquick (<250 µs)
- Point Detonating-Delay (16 ms)
- Foliage: 3m below canopy
AM578 CCF (Course-Correcting Fuze)
Fuze Data:
- Caliber:
105/155/203 mm rifled gun- Weight:
1,400 g- Length:
220 mm- Diameter (max):
61.2 mm- Steering:
4x pop-out aerodynamic fins- Guidance:
INS/GPS- Operating modes:
Time, PD-Super-Quick (SQ), PD-Delay, Proximity
Performance:
- Probable error:
<30 m CEP (range independent)- Arming setback:
>1,500 g- Max setback:
<30,000 g- Arming rotation:
>3,000 rpm- Max rotation:
<25,000 rpm- Operating Temperature:
-46 °C to +63 °C
Overview:
