There is an arming device found within the shells, which is used as a safety to limit friendly fire. They do not arm within the incredible short range used, certainly the 20 feet or I experienced. Standard minimum is around 250 yards, some even longer. That being the case it was impossible to do what you are doing within the game. You would shoot and the round would harmlessly bury itself into the ground without detonating. Also, the shrapnel caused by a standard HE round would kill troops within 10-15 meters though would most likely cause small arms damage to aircraft.
What has been going on for years is PURE arcade. Hitech needs to change this.
Boo