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1) Not necessarily... if steel had to be thinned out... then battleships wouldn't exist...

2) Steel boats don't float because there steel is thin and spread out... who told you that!? It does because of its hollowness that is filled with air... being less denser than water it exerts less pressure... the large hollow space also helps in buoyancy and so it floats.
3) You asked what's the proof that an ifv can float...
Well you see it's just a huge transport for carrying troops... it is extremely spacious... unless you cut out a hole on your IFVs floor... there no point in why it shouldn't.
4) Tyres itself without the tubing is not enough to float... tires with the tubing may have some chance... or the tubing itself will float sufficiently.....

1) Steel is certainly thinned to a level necessary.
2) Steel boats are certainly thinned and the space between its outer and inner bodies are filled with water.
3) Generally speaking, an Armored Personnel Carrier (APC) is designed to float, but not an IFV (infantry fighting vehicle).
4) Bouyancy is simply about relative density - the density of an ambient medium and the density of an object within that medium. So, if this is true, then a tyre with air inside should also float like a ship, but it all depends upon the quantity of air inside it. A tyre is not intended to float, but a ship is.
 
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1) Steel is certainly thinned to a level necessary..
Steel for what are we talking about in here? Anyways generally speaking I am not saying, if I make a small boat with huge cubes of steel whose density ratio is more than the air in the hollow space... it would certainly sink

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2) Steel boats are certainly thinned and the space between its outer and inner bodies are filled with water.
Not necessarily all the time....

3) Generally speaking, an Armored Personnel Carrier (APC) is designed to float, but not an IFV (infantry fighting vehicle).
Now here we are talking about specifics.... APC is specially designed with amphibious missions in mind...
We can't rule out the fact that IFV can technically float. Strip it off its cannons... seal the gaskets and it could float.
This reminds me of m2 Bradley infantry fighting vehicle that have two roles along with fighting the infantry ... APC and tank killer

4) Bouyancy is simply about relative density - the density of an ambient medium and the density of an object within that medium. So, if this is true, then a tyre with air inside should also float like a ship, but it all depends upon the quantity of air inside it. A tyre is not intended to float, but a ship is.
Yes. Off course like i said... but the tyre without the tubing itself... doesn't float.
If a ship was all dense without hollow space in it for the air to reduce the density in correlation with the water outside... it would sink. (Imagine:Think of it like a eraser. )
 
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Al-Zarrar Main Battle Tank (MBT), Pakistan

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Al-Zarrar is the main battle tank (MBT) of the Pakistani Army, developed and produced by Pakistan's Heavy Industries Taxila (HIT). The Al-Zarrar tank was developed by modernising and rebuilding the obsolete Chinese Type 59 tank. The tank weighs 40t and can accommodate a crew of four.


The Al-Zarrar development programme began in 1990. Pakistan is reported to have ordered 400 Al-Zarrar tanks in total and the first batch of 80 tanks was delivered to the army in February 2004. In October 2008, the Bangladeshi Army formed a joint venture with Pakistan to rebuild its Type 59 MBTs to the new Al-Zarrar tank standard. Pakistan will transfer the relevant technology to Bangladesh under the joint venture. About 300 tanks are expected to be modernised under the project, which will be carried out in Bangladesh at the 902 Heavy Workshop of the Bangladeshi Army.

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Al-Zarrar main battle tank development

The Type 59 MBT was in use by the Pakistan Armoured Corps for more than 30 years. The upgrade and rebuilding of the T-59 to Al-Zarrar was considered to be economical against replacement of the large fleet in the Pakistani Army with modern MBTs.

The first phase of the upgrade programme was completed in 1997 and the second phase began in 1998.
In the second phase, HIT rebuilt a tank by modifying 50 features of the old T-59. It incorporated some of the HIT's systems, originally developed for the Al-Khalid MBT.

HIT developed three prototypes of the Al-Zarrar and several technical and operational trials were conducted. Production of the selected version of the tank began in 2003. Future upgrades of the third phase Al-Zarrar development programme are also planned to keep it compatible with modern tanks. HIT also aims to upgrade the T-54 and T-55 to Al-Zarrar standards.

Al-Zarrar design

Al-Zarrar incorporates about 54 modifications to the original Type 59 main battle tank. The main modifications include improvements to armament, ballistic and armour protection, the fire control system, mobility and GPS. The fire control system features semi-automatic loading, computerised image stabilisation and thermal imaging for day and night combat.

Armament

'Al-Zarrar incorporates about 54 modifications to the original Type 59 main battle tank'

The primary armament of Al-Zarrar is a 125mm smoothbore gun with chrome-plated, auto-frettaged gun barrel. The secondary armament includes a 12.7mm Type 54 anti-aircraft heavy machine gun – mounted on the turret roof, which allows the crew to fire at targets from inside the tank – and two 7.62mm coaxial machine guns.

Al-Zarrar can fire armour-piercing fin-stabilised discarding sabot (APFSDS), high explosive anti-tank fin-stabilised warheads (HEAT-FS), HE-FS and anti-tank guided missile rounds. The tank can also fire 125mm Naiza, a depleted uranium round developed by Pakistan. The Naiza can penetrate rolled homogeneous armour up to 550mm-thick from a distance of 2km.

Armour protection

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The armour protection of the T-59 has been upgraded with an add-on composite armour, explosive reactive armour and anti-mine armour. The tank is also fitted with the LTS-1 laser threat warning system, developed by Al Technique Corporation (ATCOP). The ATCOP LTS-1 warns the crew when the tank is the target of a laser designator or a laser rangefinder. The sides of the turret are fitted with smoke grenade launchers. The tank also has explosion suppression and an automatic fire-extinguisher system for crew survivability.

Mobility

Mobility of Al-Zarrar has been increased by replacing the 520hp power engine of the T-59 tank with a liquid-cooled, 12-cylinder diesel engine with a power output of 730hp. The engine provides a torque output of 305kgm at 1,300rpm-1,400rpm. The rubber tracks and modified bar torsion suspension system provide agility and crew comfort stable. The transmission and power to weight ratio (18.3hp/t) were also improved to give the tank a maximum speed of 65km/h.

Pakistan's Al-Zarrar MBT | Army Technology.Com
http://www.army-technology.com/projects/alzarrarmianbattleta/
Is this legit?
 
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Bangladesh Army has acquired 18 units of Nora B-52 self-propelled howitzer from Serbia. Army has also acquired 8 battery of WS-22 Multiple rocket launcher system from China.

The Nora B-52 is a 155 mm/52-calibre self-propelled howitzer, 4th generation artillery weapon system developed by Vojnotehnički Institut, or the Military Technical Institute Belgrade, Serbia, then Yugoslavia, for export and domestic use. Bangladeshi Noras are fitted with a SAGEM Sigma 30 inertial navigation platform system for autonomous navigation and pointing

The first self-propelled Nora B was designed by MTI in 1984 with a modified 152 mm towed gun-howitzer NORA M84 with 45 caliber gun mounted on an FAP 8x8 truck bed which was a 3rd generation artillery weapon. At that time no other country except Yugoslavia had that kind of weapon - known today with the acronym TMG - Truck Mounted Gun.

After the year 2000 MTI developed new versions of a 4th generation artillery system with 52 caliber 155 mm gun for fitting on a new system of NORA family with B-52 designation.
 
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