Positive G in drops and valleys
The bottom of hills and helices — when the seat pushes hardest into you.
At the valley of a drop or inside a tight bottom curve, the track pushes up on the train. You feel heavy — positive G loading.
Big positive G is why tight loops at speed feel “punchy” and why some helices feel like they grind you into the seat.
Designers shape valleys to spread force over time — a sudden small-radius bottom hurts more than a gradual scoop.
If you love “forceful” coasters, you are often chasing well-shaped positive G, not just height.