it states its on a 30º angle from centrepoint. it doesnt state its exclusively on the 30º angle.
Center point of the frontal arc which when talking of armoured vehicles is the front of the tank/vehicle.
I think you’ll find the materials used for ERA when not denotating to provide their protection don’t particularly have high KE effectiveness.
exactly, but there is no vehicle here so…
as I said, the fact that it is low does not mean it is not there.
Right but we’re talking some 10mm of protection. From the various slabs.
10mm for a for example 83mm penetrating bullet is around 13% That is a bigger number than it seems
That’s not what the STANAG rating describes.
Right but its not the bulk of the protection afforded to a KE impact, that’s the composite layers.
1st - it’s the over all width of the lower armour 200mm plus it has a 40mm backplate
2nd - it 40mm RHA + 200mm block
ASPRO-HMT (Hybrid MTAP) is layered, with repeating tiles of passive and reactive elements. The reactive elements do nothing in KE. Ignore them. The passive is the KE defence for this armor.
When shooting between -30 and +30 degrees, follow the orange lines and you can see it will engage every tile. This is the maximum protection ASPRO provides kinetically.
Now if we increase the angle and fire a projectile at it, we miss a large portion of the tiles at the back. This invalidates the test as you have not engaged the entire strike face in the attack, hence why there is a -30 to +30 cone restriction. You must be testing relatively head on, to hit only the intended impact surface of ASPRO. Not the sides or corners or back.
6 Likes
Obviously chobham tiles will do better angled, but we are not engaging as many chobham tiles as the angle increases, actually harming the protection.
Mate I’m sorry I remain unconvinced. The spec for level 5 is the front arc of the vehicle “including the sides” its not the front arc of the armour in whatever place you put it. That means its the front armour and whatever side armour might be within the arc.
2 Likes
So how exactly is firing at the ASPRO-HMT, at a 60 degree impact angle (roughly 30 degree heading), where only a very small portion of the total brick is engaged, anywhere close to being representative of the entire bricks KE resistance?
3 Likes
One of these tests engages the entire block and gives an accurate indication of the maximum performance ASPRO-HMT can reach.
The other test gives no indication of maximum values because you’ve only shot through a small portion of the panel??
3 Likes
and you cant even claim its 2 blocks added together as one of your previous sources says they test the blocks individually
1 Like
The tests state centreline, not strikeface.
So you’ve got to be firing at the center of mass for the brick not the bricks front. Maybe this is where you’ve become confused?
Which then by that metric arent the Blocks still failing to meet their requirements as they cant stop 14.5 on their own (only with 2 blocks)
1 Like