BlenderGuru published a new tutorial about how to create Flamethrower in Blender 2.75b. If you ever wanted to make CG effect like this and never got the required „know how“ for this, watch the tutorial. A picture of the final result is at the end of this article.
In this 35min long tutorial he shows how to use smoke simulator and make an effect and simulation of flame, after turning smoke to fire and at last make the fire glow using the compositor.
Source and full article: BlenderGuru