hint: "Shaitan-tube" (it name Flamethrower "RPO-A "Shmel" in Afghanistan)
This is Item work like CF Sprayer, but create fire. Range is 7 on the front line and the last fire block create fire on neighboring 1 block in sides. If the fire faced with flammable block then the block set fire, non-flammable just setfire in block. (It only my ideas, it may reworked how you comfortably)
Works on coal and bio fuels (equivalent). 1 fuel can = 8 volleys. Fuel Pack = 4 fuel can = 32 volleys.
Why do it? -Just for FUN! How and Nuck.
You can fire mobs, friends, and homes your friends!
Of course, need add "disable crafting of Flamethrower" config, because it may used by griefers. But I think non-fire flags, may disable it too.
Flamethrower crafting recipe
Fuel Pack crafting recipe
Flamethrower fill in crafting table "empty or not full Flamethrower + Filled fuel can = Filled Flamethrower (empty fuel can drops like bukkits in cake craft)"
Fuel Pack fill in Canning Machine "1 Filled fuel can + Fuel Pack = (1/4 from full) Fuel Pack (empty fuel can drops like bukkits in cake craft)"