Challenger 2 MBT - Technical data and Discussion (Part 1)

Machinery of War Discussion Ground Vehicle
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7485

DU density = 19.07

18.6 = (0.9925 * 19.07) + (0.0075 * x), where x is the density of our mysterious non-du elements.
Solving for x you get -43.6. So the non-DU parts of the L27A1 have negative density/mass. Note these are using the absolute minimum values from that source. Instead of the 99.42% DU they actually observe. Seems legit.

It’s pretty basis maths, so you should try doing it yourself instead of putting numbers blindly into a “black box calculator”. 18.96 is the final projectile density I get.

Edit:
Apparently this is the wrong formula for density. I used a weighted average of the densities.

7486

I actuated expecting to be abit heavier, more like 5.5kg. L26 is also 4.85kg.

7487

Is 5.3 the overall weight?

7488

In WT l26 is 4.3, sad

7489

5.2kg is the weight of the penetrator I assume.

7490

That’s not the formula for density of an alloy though…

The correct formula is:
image

Which using your numbers looks like this:
image

And solves to x = 4.36

If you use 19.0 as the density for Depleted Uranium it solves to x = 4.9
And if you use 19.05 it solves to x = 4.5, which just so happens to be the density of titanium.

4 Likes
7491

By the way, will you report the issue of 2F plate thickness again?

7492

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@DevilO6 @Fireball_2020
CR3 also uses 2F late, right? I think these photos will help us confirm how thick this plate is

7493

Yea, it also uses Gen2 plate

7494

Although we cannot determine the material of this plate, I am very certain that it exceeds 50

7495

no idea

7496

Note it only used the applique in this instance, all other times it seems to not have it.

7497

Well, not like that matters. T-80B got Thermals on one tank for tests. That is why im waiting for the right time to jump on the TISP.

7498

On the train at the moment, so I’ll have to double check later, but I think that’s the formula for % by volume?

So I just used a weighted average. That assumes there is no physical interaction between the alloy components which influences density.

Maybe unfair for me to say it’s basic maths. It’s technically A-Level chemistry.

7499

the actual arithmetic is fairly straight-forward.
the bit thats tricky is actually knowing the equation/or knowing how to derive it.

1 Like
7500

So will you report about the L27A1?

7501

Can’t use a weighted average formula.

1 Like
7502

No, nothing to report. Things here were about pre production round

7503

Maybe we can let gaijin to give Cr2 the L27

7504

There is no L27, only L27A1