Shell 155mm HE 107

The shell HE 107 is designed for firing at minimum 18 kms. range. It is often used for training/pracitce, in addition to its normal roll as anti-personnel,ammunition.

Shell body is forged and machined from a special steel. It is filled with TNT. This shell can be used together with point detonating(PD) or proximity fuze. for easy handling, the shell is fitted with 'T' handle which also protects the fuze threads.

The nose of the shell is screw threaded internally to receive the fuze and the base of the shell is tappered externally to increase the aerodynamic efficiency.

When the gun is fired, the shell is ejected out at varying muzzle velocity due to the gas pressure created by the burning of propellant. The driving band on the shell gets engraved in the riffling of the barrel and makes the shell rotate. The composition exploding(CE) is activated by the fuze and the bursting charge explodes.

Different types of fuzes can be used for shell 107, viz one is Zelar Fuze has 8 different setting modes. It is designed to meet the highest safety demands and has five different safety systems. If setting is for proximity circuit, the impact circuit is earthed.

SPECIFICATIONS

PROXIMITY FUNCTION

Low sensitivity                    : Wet ground conditions

High sensitivity                   : Dry ground conditions

Normal sensitivity                 : Normal ground conditions

Safe

IMPACT FUNCTIONSM

Long delay                         : Recochet burst

Short delay                        : Penetration burst

Instantaneous Action               : High sensitivity for example 
                                         Snow covered ground
Instantaneous Action               : Normal sensitivity 

The Zelar fuze has a back up function, if the normal function fails, the fuze functions as a super quick impact fuze.

QUALITY

The Quality is ensured at every stage of manufacture. Shells are filled and a carrying handle of 'T' shape is fitted under strict Quality Control & Proof carried out for their performance requirements.

RELIABILITY

Reliability of shells and cartridge is ensured by independent testing of each sub system/sub assemblies and also further as a complete store for its functioning requirements.

STOWAGE DIMENSION OF UNIT LOAD

PACKING

The shells are packed in unit loads in wooden pallets containing 12 shells in each unit.

CHARACTERISTICS/TECHNICAL DATA

Mass of the shell with fuze           : 43.1 kg

Mass of the shell without fuze        : 42.1 kg

Length of shell with fuze             : 701 mm

Length of shell without fuze          : 604 mm

Filling type, standard                : TNT

Filling mass                          : 6.6 kg

Compatible fuzes                      : Zelar PDM 572 C1

Primer used                           : Primer M 191 A-2

Compatible charges                    : Green bas(zone 3 to 5)
				        White bas(zone 4 to 7)
				        
Muzzle velocity of shell

-at charge 5 for Green bag            : 368 m/s
-at charge 7 for White bag            : 578 m/s
-at charge 8                          : 18 km(approx)

Max. Range                            : 18 km(approx)

Maximum permissible chamber pressure  : 368 mpa

Shelf life                            : 15 years

CHARACTERISTICS/TECHNICAL DATA

Temperature operating                 : 20 to 60 deg C.

Temperature storage                   : Mean value during the year less
   				        than + 32 Deg. C Min. Temp 40oC,
					Max. + 55oC + 1150 W/M2 solar 
					radiation Equivalent to approx
					+ 70oC

UN CLASSIFICATION

Compatibility                         : D

Hazard divison                        : 1.1

Fire fighting classfication           : 1