Quote:
Originally Posted by copeab
AFAIK, all light and medium mortars are self-contained -- there is no separate charge.
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Self contained, but there's more to it.
The internal charge is usually insufficient to provide enough power to propel the bomb any real distance. This is usually for all size mortars. Charges, which are often just semi-circle, plastic, ring shaped charges filled with propellant are added (or removed). An 81mm might have up to four. They are connected around the skinny part of the bomb near the bottom by the fins.
So in some situations not only do you need to figure out bearing and elevation, but also what charge setting to use.