Weapons

WEAPONS • • • • • • •

AXLE SADDLE TRAVERSING GEAR CASING RECOIL GUN ASSEMBLY WHEEL & TRAIL

AXLE • Made up of Steel EN-24. Heat Treated & UltraSonic Tested. • Steel Bloom Supplied by SAIL & Ultra-Sonic Tested at GCF. Then Forged, Heat Treated & Machined. • Inspected by QA. • Issued for Assy.

SADDLE • SADDLE BASE MADE UF OF CAST IRON, SUPPLIED Side BY OFM. Plate • SIDE PLATES & SADDLE BASE ARE FABRICATED AND MACHINED. • INSPECTION BY QA. • ISSUED TO ASSY.

Saddle Base

Side Plate

Pivot

TRAVERSING GEAR

RECOIL RECUPARATOR CYLINDER

LINING

OIL HP CYL. AIR

OIL

BUFFER CYL.

RECOIL RECUPARATOR CYLINDER

LINING

OIL HP CYL. AIR

OIL

BUFFER CYL.

CASING

WHEEL & TRAIL ASSY.

1.Feeding and chambering:- First, the upper locking lug of the bolt hooks the extraction rim of a cartridge, strips it from the ammunition belt, and places it in the feed plate groove. The bolt then pushes the cartridge down the chambering ramp into the barrel socket and firing chamber. 2.Locking and firing:- The bolt continues to move forward into the barrel socket and rotates to the locked position. The operating rod, still moving forward, activates a final linkage that causes the yoke to press against the firing pin. The firing pin strikes and ignites the cartridge primer, which, in turn, explodes the main charge. The expanding gases from the force of the explosion push the bullet through the bore, or barrel, with great force. 3.Unlocking :- The bolt is unlocked from the barrel socket as gases from the exploding cartridge enter the hollow gas cylinder through the gas port. The gas pressure drives the piston, operating rod, and bolt to the rear. 4.Extraction and ejection:- As the bolt moves back, it revolves, loosening the cartridge case from the chamber. The extractor hooks the rim of the empty cartridge case and pulls the case from the chamber. The ejector spring expands and pushes the side of the empty cartridge case, sending it spinning through the ejection port. The firing-pin spring inside the bolt is compressed, and the gun is again cocked. The cycle of functioning repeats until the trigger on the machine gun is released.

S. No Characteristics

EQPT105/37mm IFG E1

EQPT 105/37mm LFG E2

1.

Calibre

105 mm

105 mm

2.

Barrel length

3890.5 mm

3890.5 mm

3.

Mass of Barrel

587.7 kgs

396 kgs

4.

Mass of Ordnance 840 kgs

716 kgs

5.

Mass of Eqpt

3400 kgs

2380 kgs

6.

Range

17425 Metres

17200 Metres

7.

Elevation

-3 deg. To +73 deg

-5 deg. To +73 deg

8 Traverse .

9 Rate of Fire . i) Normal ii) Intense 1 Sustained Fair 0 . i) Upto Charge 5 ii) For Charge Super

30 deg. Left

I) 5 deg. Left 5 deg. Right

30 deg. Right

II) 360 deg. Traverse on Firing platform

3 Rds/min

4 Rds/min

5 Rds/min 6 Rds/min (upto 10 mins) (upto 10 mins) 1Rd/min (For 2 1Rd/min (For 2 hrs.) hrs.) 1Rd/2 min (For 1Rd/2 min (For 2 hrs.) 2 hrs.)

11. Time into and out of action

1 min

2 to 3 min

12. Detachment

7

7

13. Recoil system Buffer

Hydraulic Rotating Valve type Controlled Hydroposumatic

Rotating Valve type Hydroposumatic Telescopic

14. Muzzle brake Double baffle type

Double baffle

15. Overall length

7216 mm

7240 mm

5054 mm (Folded Back Position)

16.

Maximum Width

1300 mm

1020 mm

17.

Chamber Capacity

5.178 litres

5.178 Litres

18.

Loading Angle

All angles

All angles

Features : Breech block - No modifications on 130mm guns. Hence no requirement for troop training. Immediate deployment after upgunning. Obturation - Failure of self sealing systems during combat overcome by use of stub cartridge case obturator based on the obturating system of the original 130mm gun. Conversion Lead time - Minimal, since no modification of the breech block. No change in travel lock, cradle and recoil system of the 130mm gun. Ammunition - All NATO standard 155mm shells and all NATO standard charge systems. . Range Diagram

RANGE (Max)

39 km

MUZZLE VELOCITY

897 m/s

MASS OF GUN IN FIRING POSITIO

8000 kg

MASS OF GUN IN TRAVELLING POSITION 8700 kg RECOIL MASS

3390 kg

LENGTH OF GUN IN TRAVELLING 11900 mm POSITION LENGTH OF GUN IN FIRING POSITION 11300 mm HEIGHT OF GUN POSITION RATE OF FIRE

IN

TRAVELLING 2550 mm 4 rds /min