M113A2 OWS-25, Israeli box IFV

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I would like to make a suggestion for a Israeli light tank, the M113 OWS 25
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sadly the history behind this vehicles is unknown. we only can say it was a M113 with a upgrade under the form of a new turret. the Overhead Weapons System (OWS) 25. this tank was apparently used by the IDF army to control the border of their territory. spotted in 2004, it is unclear how many was used and for how long. but outside of the obvious lack of info about the vehicles history, we can tell how it would be as the turret and the chassis are know separately.

Back in 1999, Israel’s corporation Rafael sold a upgrade package for Singapore. this upgrade was the M113 Ultra IFV which is a a simple M113 with OWS 25 turret similar to the on used by Israel. it is likely that about this time, this M113 was also tested for the IDF but apparently not made standard. despite not been standard, it seem the tank was still used into services.

The OWS is a turret offered by Rafael who got a significant success in the international. capable to fit many different armament, it was mounted on half a dozen APC and IFV from Singapore, Turkey, Israel and Roumania. the turret is powered to make it have a fast rotation, have a good elevation and add up 1000 kg on the chassis.

the M113 was a American APC of type “Battle taxi”. Israeli fist captured Jordanian M113 in 1967 but started to import their own M113 from USA in 1970. the M113 was replacing the M3 half-track in the Israeli army and Israel became the 2nd largest user of M113 after USA with 6,000 tank having been put at their services. the M113 participate to every Israeli conflict since his introduction but with a lot of lost when it was actually fighting. the M113 turn out to be poorly armoured and very vulnerable to mine and RPG. regardless Israel keep the M113 and adapted their used to safer role or improved their armour with ERA package. up to this day, Israel is still using the M113 actively but the venerable services of the M113 in Israel is cumming to an end with the introduction of more protected APC such as the Namer, Achzarit and soon to be produced, Eitan. most of the Israeli M113 are M113A2 but Rafael and IMI are proposing a upgrade of the M113 to M113A3 standard along with ERA armour. this upgrade do not seem to be installed on the M113 OWS 25.

Firepower

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the main armament of the M113 OWS 25 is the 25mm Bushmaster M242 auto-cannon. this auto-cannon is the same as used on the M3 Bradley. only there is not ATGM installed (at the opposite of the OWS-25R version). this auto-cannon can fire APFSDS with an interesting armour penetration that allow it to fight early MBTs. the ammo load is including 200 rounds ready to use in a dual feed belt but the ammo storage is unknown. maybe up to 5 reload could be stored inside the hull if not more. the turret is powered making it quit fast to aim. a high rotation speed in the area of 40°/sec is likely to be. the elevation range from -12°/+60° which make it a tank quit capable to engage low-flying aircraft. the turret also feature a coaxial 7.62mm machine-gun and day/night sight. the turret is controlled by both Commander and gunner from the inside of the hull just bellow the turret. the turret can be reloaded manually from inside.

Weapons characteristic

Spoiler

25 mm M242
Capacity (magazine) firerate Vertical Horizontal Stabilizer Rotation speed (°/sec) Reload (sec)
unknown (200) 201 -12°/+60° ±180° Two-plane 40 0.5

Penetration statistics
Belt Penetration @ 0° Angle of Attack (mm)
10 m 100 m 500 m 1,000 m 1,500 m 2,000 m
M792 3 3 3 3 3 3
M791 80 78 73 66 60 55
M919 101 100 95 88 81 74

Shell details
Ammunition Type of
warhead Velocity
(m/s) Projectile
Mass (kg) Fuse delay
(m) Fuse sensitivity
(mm) Explosive Mass
(TNT equivalent) (g) Ricochet
0% 50% 100%
M792 HEI-T 1100 0.19 0.1 1 54.4 79° 80° 81°
M791 APDS 1345 0.13 n/a n/a 0 75° 78° 80°
M919 APFSDS 1,385 0.1 N/A N/A N/A 78° 80° 81°

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Mobility

The M113A2 which is the version that is likely used for the M113 OWS 25, weight 11,343 combat ready with a 50 cal. the 12.7mm M2HB and the pintle mount is not very heavy and would weight about the same as the ammo storage of the 20mm. the OWS 25 turret weight 1,000 kg according to the pamphlet. this led to a weight about 12.300 kg. which is a rather normal weight for a M113. this will allow the General Motors 6V53; 6 cylinder, 2 cycle, vee diesel of 215 hp engine to give a power-weight of 17.48 hp/ton which is decent for a light tank. the tank is capable to reach 64 km/h and is amphibious with a speed of 4 km/h on the water. while in overall and at his rank his mobility would not be impressive, this tank will still have a pretty decent mobility.

Mobility characteristic

Spoiler

Max Speed (km/h) Weight (tons) Engine power (horsepower) Power-to-weight ratio (hp/ton)
Forward Reverse 215 17.48
64 15 12.3

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Protection

the M113 is built in aluminum. while been rather think, the armour would be nothing great. the tank would have difficult to take HMG fire and crack open by any main gun hit. it is not a tank that can take a beating. the crew of 3 men is placed inside the hull. the commander and gunner are sitting side by side in the end of the passenger compartment just bellow the turret while the driver sit at the front. this make the crew vulnerable to the “single hit” annihilation. the tank is also a bit tall and very flat. the turret is remotely controlled making it not really need to be well protected. the armour of the turret is estimated to be between 10 and 20mm but it would only protect the mechanical part of the gun which make it less important. despite to normally have smoke grenade, it seem the OWS 25 turret used on this tank was without smoke and the space taken by a antenna holder. in overall, this tank protection would be quit low.

Protection characteristic

Spoiler

Armour Front (Slope angle) Sides Rear Roof
Hull 38+6 mm (45°) Upper Glacis
38 mm (26°) Lower Glacis
29 mm (45°) Engine Maintenance Hatch 44+6 mm Top
32 mm Bottom 38 mm 38 mm
Turret around 20mm around 20mm around 20mm around 20mm

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Specifications
Mass 12.3 tonnes
Length 4.863 metres (15 ft 11.5 in)
Width 2.686 metres (8 ft 9.7 in)
Height 2.5 metres (8 ft 2 in)
Crew 3
Passengers 6? passengers

Armor 5083 Aluminium Alloy 28–44 millimetres (1.1–1.7 in) [3] [4] [5]
Main
armament 25mm M242
Secondary
armament 7.62mm
Engine General Motors 6V53T, 6-cylinder diesel engine
215 hp (205 kW)
Power/weight 17.48 hp/tonne
Suspension torsion bar, 5 road wheels
Operational
range 480 km (300 mi)
Maximum speed 64 km/h (42.0 mph), 5.8 km/h (3.6 mph) swimming

Source

https://bemil.chosun.com/nbrd/gallery/view.html?b_bbs_id=10044&pn=0&num=40124

Chassis

http://afvdb.50megs.com/usa/m113.html

http://www.military-today.com/apc/m113.htm

Turret

4 Likes

+1 sure why not

Funny box with funny gun and possibly relatively low BR, +1
(we need a light tank line and ifvs for Israel anyway, especially need the Namer, but this will be a great filler when that line does come eventually!)

2 Likes

CaID is back!

1 Like

@CaID
You’ve mistaken the main gun. It is not 25mm, but 30mm.

Even tho this M113 utilizes OWS-25 fighting module, which is supposed to have M242 Bushmaster. This exact vehicle features OWS-25 module with 30mm autocannon Mk.44 Bushmaster II.

Regular OWS-25 with 25mm
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With 30mm, notice the muzzle brake.
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1 Like

Yeah, think this is the 25mm based on the muzzle but used by Singapore
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There is also a suggestion on the old forum where it has the 25mm ORCWS instead
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Looking furthere there’s a bunch more M113s with different set-ups made by them, few 30mm

Yes i am back but i am having a lot to catch up. i will not get to my full speed before a while

2 Likes