André Rennes — 4-Iron #2 · Full Swing Analysis

1 Executive summary

Bottom line: his best long-iron strike on record. 178 yds total, 169 carry, 114 mph ball speed, the fastest ball speed of any iron in his logbook, and only 9 ft of curve. Launch 18° and a 42° landing: a high, straight, soft 4-iron, right on the LPGA carry average (170).

The swing is athletic and well sequenced: ~0.53 s backswing, ~0.28 s downswing (~1.9:1), hips that keep their depth, a held finish. The familiar pattern is here too: the head drops ~7 in by the time the lead arm is parallel and is still ~7 in down at impact. With this much speed, removing that dip is the next step to a lower, longer 4-iron.

Personal best

114 mph, 9 ft curve

Fastest iron ball speed and straightest 4-iron in the logbook; carry +2 yds over report #1.

Priority 1

Quiet takeaway

The cap drops in the first 0.3 s. Keep it on its line until the lead arm is parallel.

Priority 2

Lower launch

Hands ahead at impact: 18° down to ~14–15° for a penetrating long iron.

2 Ball flight — range screen

Metric	André #2 (Oct 14)	André #1 (Oct 7)	LPGA avg	PGA avg
Ball speed	114 mph ★	110 mph	116 mph	137 mph
Club speed (est.)	~81–84 mph	~79–81 mph	80 mph	96 mph
Carry	169 yds ★	167 yds	170 yds	203 yds
Flat carry	168 yds	—	—	—
Total	178 yds	183 yds	—	—
Launch angle	18°	20°	14.3°	11.0°
Apex	81 ft (27 yds)	77 ft	25 yds	31 yds
Landing angle	42°	37°	40°	46°
Curve	9 ft right ★	39 ft	—	—
Hang time	5.7 s	5.3 s	—	—
Proximity	— (no target)	51 ft	—	—

★ 4-iron personal bests (114 mph is also his fastest ball speed with any iron). Club speed isn't on the screen: at a long-iron smash of ~1.36–1.40, 114 mph means about 81–84 mph. Curve direction read from the brighter arrow (right). LPGA/PGA: classic TrackMan Tour averages (4-iron).

What it means: speed and carry are LPGA level. Versus report #1 the ball launched 2° lower, landed 5° steeper and rolled less (9 yds vs 16), so it stops faster. Bringing launch to ~15° with the same speed should add a few yards of carry and a more penetrating flight in wind.

3 Timing & tempo — measured from the video

30 frames per second, so each time is accurate to about ±0.03 s. Takeaway starts at ~48.53 s, the club reaches the top at ~49.07 s, and impact is at ~49.35 s.

Group	Backswing	Downswing	Ratio
André (4-iron #2, Oct 14)	~0.53 s	~0.28 s	~1.9:1
André (4-iron #1, Oct 7)	~0.50 s	~0.27 s	~1.9:1
André (7-iron, same day)	~0.47 s	~0.23 s	~2:1
PGA Tour (Tour Tempo, "24/8")	~0.80 s	~0.27 s	3:1

Tour figure: John Novosel, Tour Tempo. Frames: takeaway 47, top 63, impact 71–72.

What it means: identical rhythm to his first 4-iron, very repeatable. The downswing is already tour speed; a slower, fuller backswing (~0.65–0.8 s) is the free gain.

4 The reference frame — how this swing was measured

Grid: each square is about 5 inches (~7 px per inch at the golfer), scaled from his hip-to-ankle length, so treat distances as ±1–2 inches.
Vertical center line (light green): the head's address position. Horizontal lines: cap height (white) and hip height (light green) at address. The white box is the head at address.
Two corner diagonals (green): a fixed perspective scaffold for depth.
Paths: the red trail is the head and the yellow trail is the hands, frame by frame from address to impact. The red circle is the ball's address spot (already gone in this frame).
Body points were tracked automatically on every frame (210 frames, 47–54 s), head height was measured from the top of the cap, then checked by eye at each key position. The camera is fixed.

5 Swing sequence

Nine key positions, filmed from behind at an angle (down-the-line side). The target is into the picture. Times are from takeaway.

Photo 3 · Lead arm parallel+0.30 s · frame 56

Photo 5 · Arm parallel (down)+0.70 s · frame 68

Photo 7 · Ball launched+0.83 s · frame 72

Photos are numbered in the order they happen in the swing.

Left: impact close-up (frames 70–73): ball at rest, clubhead arriving, ball gone. Right: the sole shown to the camera at the start of the clip, a clear "4".

6 Position-by-position biomechanics

Club: 4-Iron, read on the sole in the video. Logged as report #2.

Photo 1 — Address Good

Athletic posture, weight centered, ball forward of center for a 4-iron.
Alignment station on the mat: a stick along the toe line, one for ball position, plus a target stick.
Very still over the ball: the cap barely moves in the 1.5 s before takeaway.

Photo 2 — Takeaway Watch

Connected start: hands, arms and chest together.
The cap is already ~3 in lower after just 0.1 s: the dip begins with the first move.

Photo 3 — Lead arm parallel Watch

Lead arm parallel at ~0.30 s, wide and on plane.
The cap is ~7 in below its address line here, and the head has moved ~5 in toward the ball.

Photo 4 — Top Good

Full turn, club near parallel at the top (~0.53 s backswing).
The head rises back to ~4 in below address; hips ~2½ in back from the ball, keeping their depth.

Photo 5 — Arm parallel (down) Good

Hands drop in front of the chest with the lower body leading.
The head begins to sink again into the strike.

Photo 6 — Impact Head down

Clubhead at the ball at ~49.35 s; one frame later the ball is gone.
The cap is ~7 in lower than at address and ~3½ in toward the ball.
Hips ~2 in back from their address depth: no early extension.
Hands back to their address spot.

Photo 7 — Ball launched Excellent

The ball has left within 1/30 s: a very solid strike (114 mph ball speed, his fastest with any iron).

Photo 8 — Release Good

Arms extend toward the target, chest rotating through.
The head starts rising once the ball is gone.

Photo 9 — Finish Excellent

Full, balanced finish facing the target, trail toe up, held while he watches the ball.

Measure (vs address)	Lead arm parallel	Top	Impact	Reading
Head, height	~7 in down	~4 in down	~7 in down	Fix early, fast dip
Head, toward ball	~5 in	~6 in	~3½ in	Watch moves with the dip
Hips, depth (toward ball)	~3 in back	~2½ in back	~2 in back	Good no early extension
Hips, height	~1 in up	~1 in up	~1 in up	Good stable
Hands at impact	—	—	≈ address spot	Watch could lead more

7 Same day, three irons (October 14)

Club (Oct 14)	Carry	Total	Ball speed	Launch
4-Iron #2	169 yds	178 yds	114 mph	18°
6-Iron #3	146 yds	150 yds	107 mph	20°
7-Iron #1	144 yds	147 yds	104 mph	22°

A healthy ~23-yd step from the 6-iron to the 4-iron (~11–12 yds per club). The 6- and 7-iron were only 2 yds apart that day, which is where the gapping work is.

8 Diagnosis

Fast, early head dip (~7 in by lead arm parallel and at impact): the same pattern seen across all his irons; it keeps launch above the LPGA window.
Hips hold depth: no early extension, ~2 in back at impact.
Tempo ~1.9:1: identical to his first 4-iron.
Contact: excellent, with his fastest iron ball speed and only 9 ft of curve.

9 Next steps — keep it simple

Quiet takeaway

First 2 ft of the backswing with the cap still: turn the chest, don't bow toward the ball. 10 slow takeaways, then full swings.

Hands ahead

Hands over the lead thigh at impact. Target: 14–16° launch with the same 114 mph.

Keep the station

The three-stick setup clearly works: keep it for long irons.

10 Limitations & next capture

One swing is a snapshot; the screen readout belongs to this swing (shown at the end of the clip).
Spin and club speed aren't on the screen: club speed is estimated from ball speed.
One angle, 30 fps, backlit: head and hip distances are ±1–2 in; the start line can't be tracked.
Club ID: read directly on the sole ("4"). Date and place from the video's own metadata (Oct 14, 1:47 pm, Mariners Point), confirmed by André.

Confidence: high on ball flight, club ID and tempo; moderate on head and hip distances.