Yes, lets imagine that level of effect on a heavily built engine when it failed to tear the longerons right next to the point of detonation! WOW! 17 grams of HE three inches from a longeron made from aluminum sheet only 0.76 MM thick and all it can do is POP THE RIVETS at the next joint! Are you kidding me? The wind at 186 MPH tore the sheet metal from the frame which was otherwise UNDAMAGED!
PS. I suspect that it was a 30 MM mine shell because the 20 MM version just does not display that much effect TYPICALLY! Read the entire sentence this time.
Note that the word caliber is DIMENSIONLESS by itself and requires a type of unit to be appended to the number to mean anything! Does 14 caliber mean a 14"( the " symbol denoting the units in this case!) or .14" a micro-caliber varmint round? The fraise 14 by itself is meaningless with out further context!
Wrong-o AGAIN! Because the HE to body ratio of the 20MM Hisso is so low, (As low as 2.6 grams of HE Vs the ~110 grams of shell body, or 6.5/105 as the best case!), the fragments rairly have more velocity than the shell it self! About 7-900 M/S!
On the other hand the 20 MM "Grenade" ( Actally a shell!) and the coined body which causes uniform fragment size and the very large charge to body ratio, the average fragment velocity is 1,200-1,300 M/S and an energy of the ~120 frags of 0.125 grams each is about 80J each!
First off, the weight of the HE charge varies between 2.6 and 6.5 grams! Secondly, most of the explosives energy is used up tearing the steel shell body into fragments! Almost none of it damages the target! That is why when you look at the holes made by the 20 MM Hisso, they are small, about the size of an American FOOT BALL! 8-10" by 4-6" with half a dozen fragment holes within 18" of the point of detonation!
What the explosive does do is give you a HUGE effect on fuel tanks that void the self sealing liner and ignite the fuel inside more than half the time it hits the tank directly. When they ran tests to discover this effect, they added aluminum to the HE to make the HEI loading to maximize the incendiary effect of the ammo! The Germans and Japs were so impressed with the incendiary effects that they made straight incendiary shells, WO ANY EXPLOSIVE IN THEM AT ALL!!! WHA-WHA-WHA!!! Modern ammo always includes Zirconium to maximize that effect!
I recommend that you buy or get on inter library loan "Tactical missile war heads" edited by Joseph Carleone! IF you send me a money order for $200 bucks, I'll loan you my copy and send the money back when you return the book!
� 1998 -