While flying C&C for LTC Sidney "Hap" Hassard, I grew to know and appreciate the man.
 Hap believed in leading from the front and was always trying to get his C&C pilots to fly lower so he could shoot too. (His M-79 exploites are another story... You havn't lived until a grenade is shot through your rotor disk while in a steep turn..)
 During this time he experimented with several ways to drop explosives. 
Hand grenades had too short of a fuse and would blow up far short of the ground. 
He tried putting a hand grenade in a jar and pulling the pin, but as often as not the jar would not break.
 He then discovered that the 250lb aerial bomb fuse and the 81mm mortar fuse had the same size thread.
 I don't know where or how he got them, but he scored a case of bomb fuses.
 Unfortunately, the small fins on the mortar shells did not offer enough resistance to rotation, and would not arm when dropped.  This was overcome by hold ing the mortar shell out into the slipstream until the fused armed and then was dropped.
 (Did I mention that his nickname was Hap?).
 So, in addition to placing skid or door mounted machineguns in the XFB-23 we also had a bomb dropping mechanism.

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