Kár.Magyarul alig jelenik meg valami közérthető.Én meg nyűglódhetek a forditókkal......
HESH nagyon nyűgös dolog volt,de működött.
Itt a digitalizált, karakter felismertetett verziója (talán könnyebb dolgod lesz a fordítókkal)
Direkt nem akartam a magyart betenni, mert a fordítózott verzió elég böte, de azért meg fogod érteni.
HEP-T (HESH)
HESH anununition (or HEP in US Army terminology) has always been somewhat mysterious,
compared to conventional armour piercing ammunition, both because its perfonnance is hard to
quantify, and because it seems to get little publicity in comparison to other ammunition types.
Function
HESH rounds work by bringing a charge of high explosive into intimate contact with an armour plate
and detonating it. Shock waves then travel through the plate at right angles to the surface, reflect off
the back of the plate, reinforce each other, and cause the steel to rupture (spall) at the rear if the
explosive charge was powerful enough. The spall detached by the HESH round is typically in the
shape of a disc that is slightly wider than the explosive contact area, and travels between
approxintately 30 m/s and 240 m/s, depending on the quality and thickness of the armour, and the
amount and type of explosive.
Explosive
The preferred explosives are those with high detonating velocities, and the best results are obtained
when the explosive can squash into the shape of a flat cone. To do this dte explosive cannot be
crumbly, but must have a soft putty-like consistency. Composition A-3 (91RDX-9Wax) proved the
best, with Composition C-4 (91RDX-9Polyisobutylene binder) coming second. Cast explosives such
as TNT or Composition B (39TNT-60RDX-1Wax) have the wrong properties, and do not provide a
HESH effect. Unfortunately, Composition A-3 and C-4 need to be press-loaded, which is more time-consuming
and expensive titan casting the explosive.
Construction
HESH rounds need a very thin soft nose and thin walls, to allow the explosive to deform and come
into proper contact with the armour plate. An annealed steel nose was found to work best., better even
than softer copper, which was a surprise. The preferred nose shape was an ogive, which provided a
greater contact area on impact than shorter hemispherical noses. Thinner nose material was found
superior to thicker material, but this was limited by the need to withstand the pressures during the
explosive's press-loading process.
The thin walls are weak, and therefore difficult to launch at high velocity. They also cannot. withstand
the forces that are normally used to press on a driving band during manufacture, causing the designers
to resort to welded overlay driving bands, which had previously been restricted to recoilless rifle
rotutds. The thin walls are also light, and thus have a low rotational moment of inertia, which makes
the shell difficult to spin stabilize. This was overcome by the use of a blunt-nosed ogive shape, which
drag stabilizes the projectile. However, the lightweight shell body and blunt high drag design mean the
round has a poor ballistic coefficient, and slows down rapidly. Nonetheless, the shells were considered
at least as accurate as HE shells of equivalent caliber.
Initial British HESH shells were of two-piece construction (nose cap and body), and the Americans
copied this design, untill they developed a one-piece shell body. This lowered production costs, and
allowed an increase itt muzzle velocity (presumably due to the removal of the weak joint).