Why Is the Javelin Tail Heavy, and How Does It Help with Stability?

[supermax_thelion1]

I’ve been wondering about the design of the javelin itself. The tail seems heavier, and I’ve read that this helps with stability during flight. Can anyone explain how that actually works in terms of aerodynamics?

 

[Bulsky]

The javelin's tail is heavier to help it spin and stay stable in the air. It's like a gyroscope, keeping it from wobbling and going off course.