Birdie GAiSwing Analysis
9-Iron · Full Swing Analysis

André Rennes

A frame-by-frame review of the 9-iron swing André filmed on October 28 at Mariners Point, with the full ball-flight readout from the range screen. It is the first 9-iron report in the logbook. The camera was very close and the golfer is cropped at the right edge of the frame, so the ball-flight section is solid and the body measurements are rough guides only. It closes with simple next steps and a clear plan for a better recording.

PlayerAndré Rennes (right-handed)
Club9-Iron · report #1
LocationMariners Point Golf Center, Foster City, CA
Footage1 swing · behind the golfer, very close (cropped at the right edge) + range screen
Session dateOctober 28, 2026

1 Executive summary

Bottom line: a very good first 9-iron on ball flight. 117 yards total ★, 116 carry ★, and 92.2 mph of ball speed ★, just under the LPGA Tour 9-iron average (93 mph). The apex of 26 yards and the 47° landing angle both match the LPGA Tour averages exactly. The ball landed soft and rolled only about 1 yard, with a gentle 6 ft curve to the left. This is the first 9-iron report, so every ★ simply sets the baseline for the next ones.

The body numbers need a careful reading. Camera position limited what could be measured, and the golfer is partly outside the frame. With that caveat, the scorecard flags three items to fix: head ~5.6 in lower than at address at impact, hips ~5.8 in higher, and a quick tempo of ~1.5:1. One item is good: the rear of the hips stayed on the address "tush line" (~0.0 in). Shoulder turn, hip turn and X-factor could not be estimated from these frames.

Strength

Tour-like flight

92.2 mph of ball speed, a 26-yard apex and a 47° landing angle sit right on the LPGA Tour averages. The ball lands soft, with 116 carry and 117 total.

Priority 1

Stay level through the ball

At impact the head is ~5.6 in lower and the hips ~5.8 in higher than at address. The hips did stay on the tush line, which is a good base to build on.

Priority 2

Shorter, smoother downswing

Tempo is ~1.5:1: a 0.60 s backswing and a 0.40 s downswing. His own 6-iron used the same 0.60 s backswing with a 0.23 s downswing.

2 Ball flight — range screen

Range screen readout
MetricAndré (Oct 28)LPGA Tour avgPGA Tour avg
Ball speed92.2 mph ★93 mph109 mph
Carry116 yds ★119 yds148 yds
Flat carry115 yds——
Total117 yds ★——
Launch angle27°23.9°20.4°
Apex78 ft (26 yds)26 yds30 yds
Landing angle47°47°51°
Spinnot shown7,589 rpm8,647 rpm
Curve6 ft left——
Hang time5.2 s——
Proximity73 ft——

★ = first 9-iron report, so these values set the baseline and are his personal best by default. On the screen, the target flags read 102 and 129 yds. The curve direction is read from the brighter left arrow; heavy reflections cover the panel, so confirm it in the app. Club speed and spin aren't on the screen: at a typical iron smash of ~1.38-1.40, 92.2 mph of ball speed means about 66-67 mph of club speed, below the LPGA average (72 mph). The ball could not be tracked in the video (30 fps: it is gone between two frames after impact), so the start line is unknown. Filming in slow motion (120 or 240 fps) would fix that.

What it means: Ball speed is within 1 mph of the LPGA average, and the apex and landing angle match it exactly. The launch is about 3° higher than the LPGA average (27° vs 23.9°), so the ball climbs and lands soft: only ~1 yard of roll (116 carry, 117 total). The carry is 3 yards short of the LPGA average (116 vs 119). Spin isn't shown, so nothing is inferred about it. The main way to add distance is club speed.

3 Timing & tempo — measured from the video

30 frames per second, so each time is accurate to about ±0.03 s. Takeaway starts at 10.40 s (frame 312), the top is at 11.00 s (frame 330), and impact is at about 11.40 s (frame 342). The top comes from hand tracking, because the hands leave the frame there.

GroupBackswingDownswingRatio
André (9-iron, Oct 28)~0.60 s~0.40 s~1.5:1
André (3-wood, Oct 24)~0.50 s~0.30 s~1.7:1
PGA Tour (Tour Tempo, "24/8")~0.80 s~0.27 s3:1

Tour figure: John Novosel, Tour Tempo. No earlier 9-iron reports exist. One frame either way moves the ratio between ~1.3:1 and ~1.7:1.

What it means: The backswing (0.60 s) is a normal length. The ratio is low because the downswing is long. Seven of its twelve frames (0.23 s) pass between the top and arm-parallel-down, which suggests a hesitation at the top or a slow transition. His 6-iron (Oct 14) paired a 0.60 s backswing with a 0.23 s downswing (~2.6:1), so he already knows the faster, smoother version.

4 The reference frame — how this swing was measured

Reference frame
  • Grid: each square is about 5 inches (24.81 px per inch). It's scaled from his body size in the frame, because his height was not given. Treat distances as rough: the cropped golfer and the camera movement make them less exact than the usual ±1 inch.
  • Center lines and diagonals: the vertical line runs through the center of his stance (feet) and the horizontal line runs through the ball line. The corner-to-corner diagonals cross at the belt buckle at address and give a fixed perspective scaffold. Dashed light-blue lines mark shoulder and knee height at address.
  • Depth rays: drawn from the mat edges extended to the horizon. Only one stick points downrange, so no vanishing point can be computed. Moves along the rays can't be cleanly separated from sideways moves.
  • Address references: the white cap line marks head height, the orange dashed waist line marks waist height, and the dashed red tush line marks the back of the hips at address. At impact, the rear of the hips stayed on the tush line (~0.0 in). The red trail is the head path and the yellow trail is the hands' path.
  • Camera: it did not stay still. The background moved about 60 px (median), roughly 2.4 in at this scale, so differences under ~2.5 in are within the noise.
  • Tracking: body points were tracked automatically on 437 frames, then checked by eye at each key position. Because the golfer's hips, shoulders and head are mostly outside the frame, many body points are estimates.

5 Swing sequence

Nine key positions, filmed from behind the golfer and very close. The golfer is cropped at the right edge, so this is not a true down-the-line or face-on view.

Photo 1 · Addresst 10.27s · frame 308
Photo 2 · Takeawayt 10.67s · frame 320
Photo 3 · Lead arm parallelt 10.90s · frame 327
Photo 4 · Topt 11.00s · frame 330
Photo 5 · Arm parallel (down)t 11.23s · frame 337
Photo 6 · Deliveryt 11.27s · frame 338
Photo 7 · Impactt 11.40s · frame 342
Photo 8 · Releaset 11.50s · frame 345
Photo 9 · Finisht 12.37s · frame 371

Photos are numbered in the order they happen in the swing. The frames follow the standard swing positions.

6 Position-by-position biomechanics

Photo 1 — Address Baseline

  • Frame 308 (10.27 s) is the reference: every distance below is measured against this frame.
  • The ball sits on the mat next to the two sticks. The golfer is cropped at the right edge, so posture (spine tilt, knee flex) can't be judged from this view.

Photo 2 — Takeaway Calm start

  • Frame 320, just after the backswing starts at frame 312. The head has sunk ~1.8 in and the hips risen ~1.8 in, small moves for this stage.
  • Hands are ~2.7 in from their address spot, so club and hands leave together.

Photo 3 — Lead arm parallel Check

  • Head is ~6.8 in lower and ~4.3 in away from the ball. Hips are ~6.3 in toward the ball and ~14.9 in up.
  • These jumps are big for a quarter of a second. With the body cropped, read them as "something moves here", not as exact distances.

Photo 4 — Top Head dips

  • Head is ~8.9 in lower and ~5.8 in away from the ball. Hips are ~6.9 in toward the ball and ~15.4 in up. The hands leave the frame here, which is how the top was found.
  • Shoulder turn, hip turn and X-factor can't be estimated: the shoulders and hips are mostly out of the frame.

Photo 5 — Arm parallel (down) Lowest head

  • Head is at ~14.8 in below address and ~7.8 in away from the ball. Hips are ~6.2 in toward the ball and ~16.6 in up.
  • Hands are ~11.2 in from their address spot and coming back down.

Photo 6 — Delivery Head lowest

  • One frame later the head reaches its lowest point on the track: ~16.4 in below address and ~3.4 in away from the ball.
  • Hips are ~6.5 in toward the ball and ~16.3 in up. Hands are ~11.9 in from the address spot.

Photo 7 — Impact Fix the rise

  • Head is ~5.6 in lower (Fix) and ~3.4 in toward the ball (Watch) than at address. It comes back up ~11 in from delivery to impact.
  • Hips are ~5.8 in higher (Fix) and ~1.6 in toward the ball (Watch). The rear of the hips stays on the tush line (~0.0 in, Good).
  • Hands are ~2.5 in from their address spot (Watch).

Photo 8 — Release Settling

  • Head ~4.3 in lower and ~2.3 in toward the ball. Hips ~1.9 in toward the ball and ~3.6 in up. Hands ~2.6 in from the address spot.
  • The club rises back into the frame on the left of the body.

Photo 9 — Finish Back at address height

  • Head is within ~0.4 in of its address height and ~0.1 in from its address depth.
  • Hips are ~2.6 in toward the ball and ~3.4 in higher, so the body ends upright. Balance can't be judged with the lead foot out of the frame.

Overlay — head at address, top and impact

Measure (vs address)TopImpactEarlier 9-iron reportsReading
Head, down~8.9 in~5.6 in— (first report)Fix lowest ~16.4 in at delivery
Head, toward the ball~5.8 in away~3.4 in toward—Watch mixes depth and sideways
Hips, toward the ball~6.9 in~1.6 in—Watch small move toward the ball
Hips vs tush line—~0.0 in—Good rear of hips stays on the line
Hips, up~15.4 in~5.8 in—Fix hips stand up through the ball
Hands vs address spot~16.7 in~2.5 in—Watch close, not back to the exact spot
Shoulder turn———n/a shoulders out of frame
Hip turn———n/a hips out of frame
X-factor (shoulder minus hip turn)———n/a needs both turns
Tempo0.60 s back0.40 s down—Fix ~1.5:1, rushed

Depth note: the camera is behind the golfer but very close, the golfer is cropped, and only one stick points downrange, so no vanishing point exists. The "toward the ball" numbers mix depth and sideways motion, and one camera can't split them. A face-on clip and a cleaner down-the-line clip will settle it (see the next capture).

7 Where the 9-iron sits in the bag

Club (best report)TotalCarryBall speedLaunchCurve
Driver · Oct 7241 yds213 yds129 mph16°38 ft
3-Wood · Oct 24200 yds172 yds121 mph10°36 ft
4-Iron · Oct 7183 yds167 yds110 mph20°39 ft
5-Iron · Oct 2169 yds159 yds108 mph19°20 ft
6-Iron · Oct 14150 yds146 yds107 mph20°17 ft right
7-Iron · Oct 14147 yds144 yds104 mph22°0 ft
9-Iron · Oct 28117 yds116 yds92.2 mph27°6 ft left

Heads-up: the 9-iron carries 28 yards less than the 7-iron (116 vs 144) with about 12 mph less ball speed (92.2 vs 104). That gap holds the 8-iron, which has no report yet. Split evenly, it would put the 8-iron about 14 yards from each neighbor. The launch keeps climbing as the clubs get shorter (22° to 27°), as expected.

8 Diagnosis

  1. Ball flight is on the LPGA Tour numbers: 92.2 mph of ball speed (93 average), a 26-yard apex and a 47° landing angle, for 116 carry and 117 total.
  2. High, soft launch: 27° is about 3° above the LPGA average, and the ball rolled only ~1 yard. Spin isn't on the screen, so the cause isn't known.
  3. The head sinks: ~5.6 in below address at impact (Fix), after a lowest point of ~16.4 in at delivery. The mid-swing size is probably inflated by the crop, but the direction (down) agrees with his other reports.
  4. The hips rise ~5.8 in through impact (Fix) and move ~1.6 in toward the ball (Watch). The rear of the hips stays on the tush line (~0.0 in, Good), so the base is not collapsing toward the ball.
  5. Hands return ~2.5 in from their address spot (Watch), close but not exact.
  6. Tempo ~1.5:1 is the lowest in the logbook, caused by a long 0.40 s downswing (Tour: ~0.27 s) rather than a fast backswing.
  7. Not measurable here: shoulder turn, hip turn, X-factor and the ball's start line.

Confidence: high on the ball flight (range screen; the curve direction is moderate because of the reflections); moderate on tempo (30 fps, the top is read from hand tracking); low on head and hip distances (golfer cropped, camera moved ~60 px, grid scaled from body size); none on rotation and ball start line.

9 Next steps — keep it simple

Priority 1 · Stay level

Cap and waist lines

From a clean camera spot, keep the cap on the white cap line and the belt on the orange waist line until the ball is gone, for 10 balls.

Feel: "chest over the ball, belt stays down." It targets the ~5.6 in head dip and the ~5.8 in hip rise.

Priority 2 · Tempo

Smooth transition count

Count "back-2-3, down". Keep the 0.60 s backswing and start down without a pause at the top.

Aim for a downswing near 0.25 s, like the 6-iron (0.23 s). It lifts the ratio from 1.5:1 toward 2.5:1.

Watch · Hands back

Return to the start spot

At impact, feel the hands arrive back where they were at address, with the club handle leaning slightly toward the target.

The hands finished ~2.5 in away; the goal is under 1 in.

Keep · The flight

Same strike, 5 more balls

Repeat the same set-up and note carry and apex for 5 balls. Keep the 47° landing and the ~26-yard apex.

This is a tour-like flight, and an average carry will anchor the 9-iron in the gapping table.

10 Limitations & next capture

Next capture: (1) record from about 3 m behind the hands, at hand height, with the whole body, club and ball in frame, (2) lay both sticks so they point downrange, which gives a vanishing point, (3) add a face-on clip, (4) film in slow motion (120 or 240 fps) to track the ball, (5) 3-5 balls for an average, and (6) give André's height to lock the grid scale.