Golf Ball Flight Laws - The 9 Ball Flights Explained
How face angle and swing path combine, and how to diagnose your own miss from one shot
Quick answer: Your clubface angle at impact starts the ball; your swing path relative to that face angle curves it. Those two inputs, each with three options (left / square / right), combine into the 9 ball flights. So after any shot, ask two questions: did it start left, straight or right (that is your face), and did it bend left, straight or right (that is your path relative to the face). No launch monitor needed. (Right-handed golfers throughout - left-handers, mirror everything.)
In this post, WhysGuy will cover:
- What golf's ball flight laws are, and why they matter.
- How the laws let you diagnose your own swing faults.
- How to identify your face angle and swing path from a single shot.
Picture this. You have been hitting banana slices right all day, and any hope of respectable ball striking has vanished. Then, on the 14th tee, a novel thought: maybe I just need to aim farther left. You make a valiant swing - and slice it even farther right, into the neighboring county.
If that sounds familiar, you would benefit from a brush-up on ball flight laws. When a right-hander fighting a slice aims farther left, they typically end up swinging farther left too (out-to-in), which is a recipe for a bigger slice, not a smaller one.
Why Ball Flight Laws Matter
Understanding them is what lets you self-diagnose. After a wayward shot, if you cannot work out what your face angle and swing path did at impact, you cannot make an educated adjustment - you are just changing things and hoping.
Here is a result that sounds backwards until you know the laws: a right-hander who wants to hit a fade needs the face angle at impact pointed left of the target, with the swing path left of the face angle. Why? To finish at the target with a left-to-right curve, the ball has to start left - so the face must point left. And to curve right, the path has to be left of the face.
Key Terms: Face Angle and Swing Path
- Face angle - the direction your clubface is pointing at impact.
- Swing path - the direction your clubhead is traveling at impact. When someone says "you're cutting across it," they mean swing path.
The 9 Ball Flights
Before high-speed tracking like TrackMan, the belief was that swing path determined the ball's starting direction. That has been debunked. It is the face angle at impact that is primarily responsible for starting direction, and the curvature reflects the swing path relative to the face.
There are effectively infinite combinations of face angle and path, but the golf world simplifies them into 9 ball flights - three face options times three path options.
| Path left of face | Path square to face | Path right of face | |
|---|---|---|---|
| Face left of target | Pull fade | Pull | Pull hook |
| Face square to target | Slice | Straight | Hook |
| Face right of target | Push slice | Push | Push hook |
The key point: shot shape is a function of swing path relative to the face angle, not relative to your target. An out-to-in path will not produce a slice if your face angle is even farther left than your path at impact.
(This assumes centered contact and no wind. Off-center hits and weather change the picture.)
How to Read Your Own Ball Flight
Two questions, after any shot:
- Did the ball start left, straight, or right of my target? That tells you your face angle at impact.
- Did it curve left, stay straight, or curve right? That tells you your swing path relative to that face angle.
Case Study: The Push Slice
A drive starts right and keeps slicing. Run the two questions:
- The ball started right of the fairway, so the face angle must have been pointed right - open, for a right-hander.
- The ball curved right in the air. Any time the ball curves right, the swing path has to be left of the face angle at impact.
Diagnosis: open face, with a path even farther left of it. Aiming left will make it worse.
Case Study: The Pull Hook
A drive starts well left of the fairway and curves left into the trees. Same two questions:
- The ball started left of target, so the face angle was closed to the target at impact.
- The ball hooked, so the swing path had to be right of the face angle.
Diagnosis: closed face, path right of it. Note that both of these misses involve a face and a path that disagree - the size of that disagreement is the size of the curve.
Why the Laws Don't Seem to Work - Common Mistakes
- You're measuring path against the target, not the face. This is the big one. Path relative to face creates curve; path relative to target does not.
- You're aiming around the curve. Aiming left to allow for a slice usually makes you swing left, widening the face-to-path gap. You have to change the relationship, not the aim.
- You're judging start direction too late. The first third of the flight is the start line. If you only look at where it finished, you have measured start and curve mixed together.
- You're ignoring strike. A shot off the toe or heel curves from gear effect regardless of your face and path. Check your strike pattern before diagnosing anything.
- You changed face and path at once. Then you cannot tell which one moved the ball. One at a time.
Key Takeaways
- Ball flight laws are essential if you want to diagnose your own swing faults and adjust quickly.
- The clubface angle at impact primarily determines the direction the ball starts.
- Curvature reflects the swing path direction relative to the face angle at impact - not relative to your target.
- Two questions after any shot give you both, without any technology.
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Frequently Asked Questions
What are golf's ball flight laws?
They explain the 9 ball flights in golf and the impact conditions that produce each one. In short - the clubface angle at impact determines where the ball starts, and the swing path relative to that face angle determines which way it curves.
What's the difference between the old and new ball flight laws?
The old laws, widely taught before launch monitors like TrackMan, held that swing path determined the ball's starting direction. That has been shown to be wrong. The new laws put face angle in charge of starting direction, with curvature coming from the path relative to the face.
How much does clubface angle affect the ball's starting direction?
For full shots, face angle at impact accounts for roughly 75-95% of the ball's initial direction. Closer to the green, path takes on more responsibility - in bunkers path dominates, because the club usually never touches the ball and the sand pushes it out.
How do I hit a fade?
For a right-hander, your clubface wants to be left of your target at impact so the ball starts left, and your swing path needs to be farther left still so the ball curves back right. Full detail in our guide to hitting a fade.
How do I hit a draw?
The mirror image. Your face angle should be slightly right of your target at impact, and your swing path slightly right of the face angle. Full detail in our guide to hitting a draw.
Why does aiming farther left make my slice worse?
Because aiming left usually makes you swing left. A right-hander who aims left to allow for a slice tends to produce an even more out-to-in path, which increases the face-to-path gap - and the gap is what creates the curve. You add slice by trying to aim around it.
Can I have an out-to-in path and not slice it?
Yes. Curvature comes from the path relative to the face, not relative to your target. An out-to-in path with the face even farther left of that path produces a pull that draws, not a slice. This is the single most misunderstood point in the whole subject.
Do I need a launch monitor to use this?
No. Two questions after any shot - where did it start, and which way did it curve - give you the face angle and the path relative to it. That is enough to make an informed adjustment.
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