Designation:

FH-77 B05 L52

Info
Manufacturer: Bofors Defence AB  
Product type: Weapons & Weapon Systems  
Name: Towed gun  

The FH 77B05 L52 is a further development of the successful FH 77B02 L39 howitzer system. The system meets or supersedes all requirements for a modern, towed artillery system, which is made possible through a number of improvements.

The longer barrel and larger chamber volume result in extended firing range of more than 40 km and enable firing of the next generation smart ammunition.

Onboard ballistic computer enabling calculating firing data, automatic laying and firing control, automatic input of ammunition data and meteorological data.

The FH 77B05 L52 has its own land navigation system, eliminating the need for surveying and alignment giving the complete system a very low LCC.

BENEFITS

  • Integrated navigation, positioning and aligning system and onboard ballistic calculation

  • Automatic servo controlled laying

  • Intra-howitzer radio communication

  • Intra-battery communication > 5 km

  • Handles modular charges and bag charges

  • Spares and logistics similar to FH77B

  • Direct firing capability out to 2 km

  • MRSI capability, up to 5 hits in a target momentarely

Mobility

Over long distances, a cross country truck tows the gun.

The towing truck and gun can travel at the speed of 80 km/h. For short periods of time and when road conditions allow, the speed can increase.

For cross-country driving, the gun can be tandem-driven from the towing truck. Maximum speed is about 8 km/h and cross-country mobility is excellent.

Over short distances, the gun can be driven independently at speeds of up to 8 km/h.

For deploy/redeployment the gun uses its own power unit.

Gun in/out of action time (trained crew) is less than 90 seconds.

Firing

One of the most important attributes of the Field Howitzer 77B05 is the high rate of fire, i.e. its ability to fire a great number of rounds in a specified time, and MRSI (Multiple Round Simultaneous Impact).

The gun has an automatic laying system with on-board ballistic calculation.

Howitzer Computer Unit (HCU)

The HCU contains the GUI (Gun Users Interface) software and the software for ballistic calculations. It also handles communication with:

  • CCM (Control Computer Module) controlling the system for loading, laying and firing, and also receives data from the INS

  • Laser Range Finder

  • Muzzle Velocity System

  • Barrel Temperature Sensor

  • MRR for sending and receiving data messages

HCU

Processor Intel Pentium III 500 MHz

  • Ram 256 MB SDRAM

  • HDD 10 GB removable

  • Power specification 10 - 30 VDC with 5 min UPS

CCM

  • Power card Convert 24 V to 5 V

  • CPU card

  • CPU TMS320C32, 50 MHz, 512 kB EEPROM

  • Logic card Signals IN/OUT

Gun laying is carried out hydraulically using variable servo valves. Laying can be carried out using the following modes:

  • Normal:

Automatic laying by the HCU. The HCU calculates obtained firing data, prevents laying outside the gunís laying and firing limitations and automatically lays onto target.

  • Direct Fire:

When laying using the joystick, the HCU calculates the ?ring data automatically and aiming takes place with no further action. The HCU prevents laying outside the gunís laying and ?ring limitations.

  • Technicianís mode:

Manual laying using the joystick - will override laying and firing limitations.

Specifications:
Property Value
Barrel length (calibres)
52
Main weapon caliber (mm)
155
Rate of fire (rds/min)
3
Elevation (degree)
70
Depression (degree)
-3
Traverse arc (degree)
50



FH-77 B05 L52 quantities:
Country Qnt
INDIA INDIA
410
NIGERIA NIGERIA
48
SWEDEN SWEDEN
51
Qnt:
509

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