Can Patna municipal corporation purchase this truck?
Yes :biggrin2:
Thing is, at these kinds of velocities, the hardness of the materials don't matter. Even hardened RHA steel has different properties when meeting a hypervelocity object. Overall think of it like the pressure created at the contact point of the slug and armor steel exceeds its yield strength.
But it's true that the diameter of the copper liner matters. A small roadside efp mine which takes out a humvee won't be able to disable a mbt. A large enough efp mine would be eventually be able to disable a mbt class target, but at that point it might be too large to conceal or too cumbersome. A better trick is to fire the slug from top, where the armor in thinner.
Bill 2 ATGM with overfly-top-attack warhead.
TOW 2B heavy ATGM
Technically EFPs are a subset of the shaped charge or HEAT mechanism. Same copper plate will form a jet of metal instead of a solid slug if it's made more conical on the concave side.
https://en.wikipedia.org/wiki/Shaped_charge
Wait, so this looks very effective in ATGMs! Now that India is making progress in this tech, is any version of Indian atgm going to have this, other than regular ol' tandem shaped charge?
What's the status of this? Haven't read about it in any news...
Tandem shaped charge of ATGM already includes a EFP ( main warhead installed in the rear ) .
So, the first one to detonate ERA is EFP?
No the precursor charge at the front section disables the ERA first, then the main charge at the rear which is a powerful EFP warhead is fired to punch through the targets exposed armour
Another question; Why are the propeller designed to rotate in opposite directions to each other? Won't the resultant *turbulence increase its signature?
No idea
First of all kinda more bang for bucks that's why this type of propeller is used.
On torpedos contra-rotating propellers are mainly used cause of the size limitation. Propeller diameter can't be more than the launch tube, and you can spin a single prop only so fast before cavitations kicks in and causes efficiency loss and noise. Torpedos need maximum speed from one time use expendable machinery. Ships don't use them cause prop size isn't limited so strictly and gearbox complexity would be too much.
