Is a 3m Golf Cage Tall Enough to Hit Driver? The Geometry
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The article uses step-by-step geometry to show that a 3m tall cage clears a driver swing for nearly all golfers. It calculates that a driver head peaks around 2.3–2.6m above ground for a typical golfer, leaving 30–60cm of clearance, and shows that a ball traveling 2–3m at typical launch angles (10–15 degrees) hits the net well below the top. Edge cases like very tall golfers with upright finishes can approach 2.8m but remain within a 3m frame on level ground.
Excerpt from Open Golfer - Blog
Yes. A 3 m tall golf cage clears a driver swing for almost every golfer, and the ball meets a net 2.5 to 3 m away well below the top. A driver is about 1.15 m long, the club head peaks around 2.3 to 2.6 m, and a 10 to 15 degree launch hits the net under 1 m high.
The swing: how high does a driver head go?
Start with the club. A men's driver is 45 to 46 inches long, which is 1.14 to 1.17 m. The club head traces an arc around your body, and the question is how high that arc gets at the top of the backswing and in the follow-through. This is arithmetic, not a test, so I'll show the working.
For a golfer of 1.80 m, the shoulders are at about 1.45 m. At the top of the backswing the hands are roughly at head height, call it 1.70 to 1.80 m, and the shaft points back behind the head on a tilted plane, not straight up. The club head therefore sits above the hands by a fraction of the shaft length, not the whole of it. If the shaft sits 45 degrees above horizontal at the top, the head is about 0.8 m above the hands, so around 2.5 to 2.6 m. If the shaft is nearer horizontal, as it is for many golfers, the head is lower, nearer 2.3 m. The follow-through is similar: hands around head height, shaft angled behind, club head in the same 2.3 to 2.6 m range.
Add the tee peg, which lifts the ball but not the swing, and the mat you stand on, which does lift the swing. A hitting mat on a rubber base adds roughly 5 cm. That puts the highest point of a full driver swing around 2.4 to 2.7 m above the ground the cage stands on, inside a 3 m frame with 30 to 60 cm to spare.
The exceptions are real but narrow. A golfer of 1.95 m with a very upright finish could get the head to about 2.8 m. That is still inside 3 m, but it is close enough that I'd want the frame on level ground and the mat kept thin. Nobody in normal play swings a driver in a vertical circle with arms and shaft in a straight line, which is the only geometry that puts the head above 3 m.
The ball: where it meets the net
Driver launch angle is the angle the ball leaves the ground at. A typical amateur launches a driver at 10 to 15 degrees; a very high launch is 18 to 20 degrees, and anything above that is a skied shot off the top of the club. The height of the ball when it reaches the net is the distance to the net multiplied by the tangent of the launch angle, plus the tee height. The table does the sums for the distances you can get inside a 3 m deep cage.
Launch angle Height at 2 m Height at 2.5 m Height at…
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