Birdie GAiSwing Analysis
6-Iron · Full Swing Analysis

André Rennes

A frame-by-frame review of André's 6-iron swing from the November 2 session at Mariners, hit off natural grass and filmed down-the-line from behind the hands. No range screen was shown with this clip, so the report is about movement, timing and body position, and it closes with simple next steps.

PlayerAndré Rennes (right-handed)
Club6-Iron · report #8
LocationMariners Point Golf Center, Foster City, CA
Footage1 swing · down-the-line · natural grass · no range screen
Session dateNovember 2, 2026

1 Executive summary

Bottom line: a repeatable, well-paced 6-iron. The tempo is 2.6:1 (0.60 s back, 0.23 s down), in the good band and tied with his best 6-iron tempo. The hips stay back through impact (about 1.0 in away from the ball, and the rear of the hips ~0.7 in inside the tush line), and the shoulders turn about 85°. There is no range screen, so ball flight is not measured. For reference only, an estimated ~146 yds carry and ~150 yds total (~107 mph ball speed) comes from his earlier 6-iron reports. That is an estimate, not a measurement, and not a personal best.

The clear job is still the head: it sits about 5.8 in lower than at address at impact, close to the ~6 in seen in his earlier 6-iron reports. Two smaller items are on watch: the hips rise ~1.8 in and the hands return ~1.5 in from their address spot. This is report 8 of 10 for the 6-iron.

Strength

Tempo and hips

Tempo 2.6:1 (good band), hips staying back, shoulder turn ~85° with a ~45° X-factor.

Priority 1

Stay tall

Keep the cap near its address line. The head sinks ~5.8 in by impact, which makes the low point of the swing harder to repeat.

Priority 2

Quiet the waist

The hips rise ~1.8 in and the hands finish ~1.5 in off their address spot. Keep the belt line level so the club returns to the same place.

2 Ball & club speed — estimated from the video

MetricEstimateRangeSource
Club speed~77 mph74–80 mphEstimated
Ball speed~107 mph103–111 mphEstimated
Carry~146 yds140–152 ydsEstimated
Total~150 yds144–156 ydsEstimated

Not measured: no range screen in this clip. Your 3 earlier 6-Iron reports with range-screen data, adjusted by this downswing time (at most ±2%). Confidence: moderate on club speed and yardage, low to moderate on ball speed. Not logged as a personal best.

What it means: A photo of the range screen or a 240 fps slow-motion clip makes these numbers more precise.

3 Timing & tempo — measured from the video

30 frames per second, so each time is accurate to about ±0.03 s. The backswing starts at about 17.43 s, the top is at 18.03 s, and impact is at about 18.26 s.

GroupBackswingDownswingRatio
André (6-iron #8, Nov 2 swing)~0.60 s~0.23 s~2.6:1
André (6-iron #3, Oct 14)~0.60 s~0.23 s~2.6:1
André (6-iron #2, Oct 18)~0.53 s~0.27 s~2:1
André (6-iron #1, Oct 6)~0.45–0.60 s~0.23–0.30 s~2:1
André (3-wood #1, 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. One frame either way on the downswing moves the ratio between about 2.3:1 and 3:1.

What it means: The 0.23 s downswing is close to the Tour's 0.27 s, and the ratio sits inside the good band (2.5–3.5:1). It matches the Oct 14 swing exactly, which shows a rhythm he can repeat. The backswing is still shorter than the Tour's 0.80 s, but at 6-iron length that is a fine place to be.

4 The reference frame — how this swing was measured

Reference frame
  • Grid: each square is about 5 inches (~34 px at 6.82 px per inch). It is scaled from his body size in the frame because his height wasn't given, so treat distances as ±1 inch.
  • Center lines: the vertical line runs through the center of his stance (feet) and the horizontal line through the ball line. They are fixed references for balance, spine and height.
  • Corner diagonals and depth rays: the diagonals cross at the belt buckle at address and give a fixed perspective scaffold. This clip has no sticks, foot line or mat (he hits off natural grass; the two bare strips near the ball are divot or wear marks). The depth rays are therefore only a perspective guide, not a true target line.
  • Address references: the white line is the top of the cap (head height), the line at belt-buckle level is waist height, and the dashed light-blue lines mark shoulder and knee height. The dashed red tush line is the back of the hips at address. The red trail is the head path and the yellow trail is the hands' path.
  • Tracking: body points were tracked automatically on 240 frames starting at 14.0 s, then checked by eye at each key position. The camera stayed still: the background moved less than 0.3 px.
  • Ball: it could not be tracked, because at 30 fps the ball is gone between two frames right after impact. Slow motion (120 or 240 fps) would allow it.

5 Swing sequence

Nine key positions, filmed down-the-line from behind the hands, slightly offset toward his back. The target is straight into the picture.

Photo 1 · Addresst 17.30s · frame 99
Photo 2 · Takeawayt 17.60s · frame 108
Photo 3 · Lead arm parallelt 17.76s · frame 113
Photo 4 · Topt 18.03s · frame 121
Photo 5 · Arm parallel (down)t 18.16s · frame 125
Photo 6 · Deliveryt 18.20s · frame 126
Photo 7 · Impactt 18.26s · frame 128
Photo 8 · Releaset 18.33s · frame 130
Photo 9 · Finisht 19.06s · frame 152

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 Good

  • Balanced, athletic set-up on natural grass: knees flexed, arms hanging, hands just below the belt line.
  • This frame sets the cap line, belt-buckle line and tush line that every later frame is measured against.

Photo 2 — Takeaway Head sinks early

  • The hands and club leave together in a one-piece start (hands ~1.8 in from their address spot).
  • The head is already ~3.4 in lower and ~1.1 in toward the ball, and the hips have moved ~1.4 in away from the ball. The dip starts here.

Photo 3 — Lead arm parallel Head low

  • Head ~5.8 in lower than at address and ~2.8 in toward the ball: its lowest point of the backswing.
  • Hips ~2.4 in away from the ball and only ~0.9 in higher, so the base stays steady and does not slide in.

Photo 4 — Top Full turn

  • Shoulders turned about 85° and hips about 40°, so the X-factor is ~45° (visual estimates, ±10–15°).
  • Head ~3.9 in lower and ~2.6 in toward the ball. Hips ~2.5 in away from the ball: they turn instead of sliding in.

Photo 5 — Arm parallel (down) Head drifts in

  • Head ~5.1 in lower and ~3.6 in toward the ball, its largest inward number of the swing (see depth note).
  • Hips ~1.2 in from their address depth and still moving away from the ball, so the lower body starts the downswing from a stable base.

Photo 6 — Delivery Solid

  • Hands ~8.5 in from their address spot and arriving, with the hips turning while staying back (~0.8 in away from the ball).
  • Head ~5.3 in lower and ~3.2 in toward the ball.

Photo 7 — Impact Watch the head

  • Head ~5.8 in lower than at address (fix band) and ~1.8 in toward the ball (good).
  • Hips stay back: ~1.0 in away from the ball, with the rear of the hips ~0.7 in inside the tush line. Hips rise ~1.8 in (watch).
  • Hands ~1.5 in from their address spot (watch). The hips lead at about 35° open while the shoulders are about 15° open.

Photo 8 — Release Extending

  • Both arms extend after the ball and the chest keeps turning.
  • The head reaches its lowest point here, ~6.5 in below address, with the hands ~9.1 in from their address spot.

Photo 9 — Finish Excellent

  • Tall and balanced on the lead leg, trail foot up on its toe with the sole facing the camera.
  • The head is back up, ~4.6 in higher than at address, and the hips keep rotating through.

Overlay — head at address, top and impact

Measure (vs address)TopImpact6-iron #3, Oct 14 (top / impact)Reading
Head, down~3.9 in~5.8 in~2 in / ~6 inFix same dip as before
Head, toward the ball~2.6 in~1.8 in— / ~1.5 inGood see depth note
Hips, toward the ball−2.5 in (away)−1.0 in (away)— / stays back (~0.9 in)Good hips stay back
Rear of hips vs tush line—−0.7 in (inside)— / on the line (#5)Good stays on the line
Hips rise (waist height)~0.4 in~1.8 in— / ~1 inWatch rises a bit more than before
Hands vs address—~1.5 in— / —Watch close, not exact
Shoulder turn~85°~15° open~85° / —Info near full turn
Hip turn~40°~35° open~40° / —Info hips lead at impact
X-factor (shoulders − hips)~45°—~45° / —Info same as before
Tempo (back / down)~0.60 s~0.23 s~0.60 s / ~0.23 sGood 2.6:1, ties his best

Depth note: from behind, the head's ~2–4 in toward-the-ball shift sits partly along the depth rays, so it mixes "toward the ball" with "toward the target". One camera can't split the two. With no sticks or mat in the frame, the depth rays are only a guide here. Rotation numbers are visual estimates (±10–15°).

7 One pattern, the whole bag

ReportHead down at impactHips at impactTempo
6-Iron #8 · Nov 2~5.8 instay back (~1.0 in away)~2.6:1
6-Iron #3 · Oct 14~6 instay back (~0.9 in)~2.6:1
6-Iron #2 · Oct 18~5 inhold depth~2:1

The link: across his 6-iron reports, the head sinks about 5–6 in by impact and the hips stay back. That is a steady strength and a steady habit, so a fix for the head should carry over to the other clubs. In report #2 the hips held depth better than in his 7-iron. This clip has no ball data, so what the head dip does to contact and launch is still open.

8 Diagnosis

  1. Rhythm is a strength: 2.6:1 (0.60 s / 0.23 s) is in the good band and equals his best 6-iron tempo. The Oct 14 swing had the same numbers.
  2. The head sinks ~5.8 in by impact, starting at the takeaway (~3.4 in). It is the same ~6 in as earlier 6-iron reports and the one fix-band number on the scorecard.
  3. Hips stay back: ~1.0 in away from the ball at impact and ~0.7 in inside the tush line, so there is no early extension.
  4. Hips rise ~1.8 in (watch), a little more than the ~1 in of his earlier swing. With the head sinking, the upper body is dropping lower rather than staying level.
  5. Good turn: shoulders ~85°, hips ~40° at the top (X-factor ~45°), and the hips lead at impact (~35° open against ~15° for the shoulders).
  6. Hands return ~1.5 in from their address spot (watch). That is close, but a little less exact than ideal.
  7. Ball flight is unknown: no screen, so the estimates (~146 carry, ~150 total, ~107 mph) are guesses from his earlier 6-iron reports, not measurements.

Confidence: high on tempo (measured frame by frame); moderate on head, hip and hand distances (grid scaled from body size, ±1 inch); low to moderate on rotation angles (visual estimates, ±10–15°); low on ball flight (no screen, estimate only) and on the toward-ball vs toward-target split (needs a second angle).

9 Next steps — keep it simple

Priority 1 · Stay tall

Cap-on-the-line check

Same camera spot. Keep the top of the cap close to the white address line until the ball is gone, for 10 balls.

Feel: "chest over the ball, knees keep their flex." Aim to bring the ~5.8 in dip toward the 2 in good band.

Priority 2 · Quiet waist

Level belt line

Keep the belt buckle at its address height through impact. Think "turn, don't stand up", and let the hands return to the spot they started from.

Targets the ~1.8 in hip rise and the ~1.5 in hands gap in one feel.

Keep · Tempo

Same count

Count "back-2-3, down-1" as today. Keep the ~0.60 s back and ~0.23 s down.

It is his best 6-iron rhythm and it repeats.

Keep · Hips back

Back pockets on the line

The rear of the hips stayed on the tush line (~0.7 in inside). Keep that feel through impact.

It protects against early extension and keeps the base steady.

10 Limitations & next capture

Next capture: (1) the same down-the-line spot, with a club or stick laid on the grass along the target line to anchor the depth rays, (2) a photo of the range screen right after the shot, (3) a slow-motion clip (120 or 240 fps) so the ball can be followed, (4) a face-on clip at chest height, (5) the clubhead sole shown clearly to the camera, and (6) André's height, to lock the grid scale.