Mevo Gen2 Pro — Data Mastery Playbook

The Data Hierarchy

The Mevo Gen2 Pro Package generates 20 distinct data points. Understanding the hierarchy — which data drives which — is the foundation of intelligent analysis.

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The Core Principle. The Mevo does not tell you what your swing looks like — it tells you what your swing produces. Ball data is the outcome. Club data is the cause. Always diagnose with club data, validate with ball data.

📊 The Three Data Layers

Layer 1 — Impact Efficiency

Was the strike efficient?

Ball Speed, Club Speed, Smash Factor, Dynamic Loft, Spin Loft, Low Point. These tell you whether the club delivered energy to the ball efficiently at the moment of contact.

Layer 2 — Directional Control

Where did the ball start and curve?

Face Angle, Club Path, Face-to-Path, Attack Angle, Launch Direction, Spin Axis, Curve. These tell you everything about the D-Plane — the physics governing ball direction and curvature.

Layer 3 — Flight Characteristics

Did the ball fly optimally?

Launch Angle, Spin Rate, Apex Height, Carry Distance, Total Distance. These are the output of Layers 1 and 2 — the evidence that your impact and direction numbers are producing the correct flight.

🗺 The 20 Data Points — Master Map

Data Point	Category	Driver	Irons
Ball Speed	Ball	Critical	Critical
Club Speed	Ball	Critical	Critical
Smash Factor	Ball	Critical	Critical
Carry Distance	Ball	Critical	Critical
Total Distance	Ball	Secondary	Secondary
Launch Angle	Flight	Critical	Critical
Launch Direction	Flight	Critical	Critical
Spin Rate	Flight	Critical	Critical
Spin Axis	Flight	Critical	Critical
Apex Height	Flight	Useful	Critical
Curve	Flight	Critical	Critical
Attack Angle	Club ★ Pro	Critical	Critical
Club Path	Club ★ Pro	Critical	Critical
Face Angle	Club ★ Pro	Critical	Critical
Face to Path (F2P)	Club ★ Pro	Critical	Critical
Dynamic Loft	Club ★ Pro	Critical	Critical
Spin Loft	Club ★ Pro	Critical	Useful
Low Point	Club ★ Pro	N/A	Critical
Vert. Swing Plane	Club ★ Pro	Useful	Useful
Horiz. Swing Plane	Club ★ Pro	Useful	Useful

Ball Data

Five data points measuring what happened to the ball at and after impact. These are your efficiency and distance numbers.

① Ball Speed

Ball Speed

The Speed the Ball Left the Clubface

The single most important distance metric — more than club speed. It is the combined result of club speed, centredness of strike, and dynamic loft efficiency. A ball struck off-centre loses 3–8% ball speed even with identical club speed.

Ball Speed Benchmark

Driver: Scratch = 160–175 mph · 10 HCP = 140–155 mph 7-Iron: Scratch = 120–130 mph · 10 HCP = 105–118 mph PW: Scratch = 100–108 mph · 10 HCP = 88–98 mph

Ball speed × 2.5 = approximate carry distance (driver). If your ball speed is low, determine whether it is a speed problem (club speed low) or a contact problem (smash factor low) before choosing a fix.

② Club Speed (Clubhead Speed)

Club Speed

The Raw Speed of the Clubhead at Impact

Your engine size — your potential ceiling for distance. Club speed is not fixed; it can be trained. Increasing club speed by 5% with the Rypstick yields approximately 10–15 yards of driver carry, assuming smash factor is maintained.

Club Speed Benchmark

Driver: Scratch = 108–118 mph · 10 HCP = 93–103 mph 7-Iron: Scratch = 88–96 mph · 10 HCP = 78–87 mph

Track club speed weekly. Any drop of more than 3% vs. your average = fatigue, injury, or a mechanical change costing speed. Investigate immediately before continuing speed training.

③ Smash Factor

Smash Factor

Contact Efficiency — The Most Underrated Metric

Smash Factor = Ball Speed ÷ Club Speed. It measures how efficiently the club transferred energy to the ball. The physical maximum for a legal driver is approximately 1.50. Smash factor is a pure contact quality metric — it rises when you hit the sweet spot and drops when you miss it.

Smash Factor Targets

Driver: Tour = 1.48–1.50 · Scratch = 1.46–1.49 · 10 HCP = 1.42–1.45 7-Iron: Tour = 1.40–1.42 · Scratch = 1.38–1.41 · 10 HCP = 1.35–1.39 PW: Tour = 1.36–1.38 · Scratch = 1.34–1.37 · 10 HCP = 1.30–1.34

Below 1.43 driver consistently = contact quality problem. Below 1.35 irons = significant off-centre contact. Critical insight: a player with 105 mph and 1.40 smash (147 mph ball speed) will be out-driven by a player with 100 mph and 1.48 smash (148 mph ball speed) — with less effort.

④⑤ Carry Distance and Total Distance

Carry vs. Total

Why Carry Is the Only Number That Matters for Club Selection

Carry is where the ball lands. Total includes roll. On a mat or hard fairway, roll can add 15–30 yards, making total distance misleading for course management. Use carry exclusively for your personal distance matrix. Your mean carry — not your best carry — is your real distance. Most amateurs overestimate by 10–15 yards per club.

Club Data — Pro Package

The diagnostic engine of the Mevo Gen2. These eight metrics tell you exactly what the club was doing at impact — the direct cause behind every ball flight result. Exclusive to the Pro Package.

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Pro Package Exclusive. Attack Angle, Club Path, Face Angle, Face-to-Path, Dynamic Loft, Spin Loft, Low Point, and Swing Plane are only available with the Professional package. This is where diagnostic precision separates the Mevo Gen2 from basic launch monitors.

⑥ Attack Angle (AoA)

Attack Angle

The Vertical Direction the Clubhead Was Travelling at Impact

Measures whether the club was moving downward (negative) or upward (positive) at the moment of impact. This single number has enormous consequences for both distance (driver) and spin (irons).

Attack Angle Targets

Driver (optimal): +3° to +5° ascending = 15–25 extra yards Driver (typical amateur): −1° to −3° descending = distance lost Irons (optimal): −3° to −5° descending = compression + spin Irons (too steep): −8° to −12° = over-spin, ballooning

For driver: every 1° more ascending attack angle = approximately 2–4 yards additional carry with no change in club speed. Fixing attack angle alone is the most common "free yards" opportunity in amateur golf.

⑦ Club Path

Club Path

The Horizontal Direction the Clubhead Was Travelling at Impact

The direction the clubhead was moving through impact, relative to the target line. Negative = out-to-in (fade/slice path). Positive = in-to-out (draw/hook path). Club path controls how much the ball curves — not where it starts. Do not confuse path with start direction.

Club Path Reference

−6° to −10° = Out-to-in (classic slicer path) −1° to −4° = Mild out-to-in (consistent fade pattern) 0° to +1° = Neutral path (tour standard) +2° to +4° = In-to-out (draw pattern) +6° to +10° = Severely in-to-out (push / hook)

Club path alone tells you nothing about shot shape. You need Face-to-Path to determine curve. A -8° path with a -6° face angle (only 2° F2P) produces a gentle fade, not the slice you might expect from the path number alone.

⑧ Face Angle

Face Angle

Where the Clubface Was Pointing at Impact — Controls 83% of Start Direction

Measures where the face was pointing relative to the target line. Negative = closed (pointing left). Positive = open (pointing right). Face angle is the most powerful number in your data set — it controls approximately 83% of the ball's initial starting direction.

Face Angle Impact on Start Direction

Ball start direction ≈ Face Angle × 0.83 Face +4° open → ball starts ~+3.3° right of target Face −3° closed → ball starts ~−2.5° left of target

At 150 yards, 1° of face angle = approximately 7 feet of lateral movement at the target. HackMotion lead wrist angle data directly correlates with face angle — a 20° wrist angle difference produces 12–15° face angle difference at impact.

⑨ Face to Path (F2P) — THE Key Metric

Face to Path — The Curve Engine

The Relationship Between Face and Path — Most Important Single Combination

F2P = Face Angle minus Club Path. It is the direct input to spin axis and ball curvature. F2P controls how much the ball curves, not where it starts. This is the number to obsess over.

F2P Reference Chart

F2P 0° = No curve F2P +1° to +2° = Gentle fade (tour-quality) F2P +3° to +5° = Noticeable fade F2P +6° to +8° = Strong fade / slice territory F2P −1° to −3° = Reliable draw F2P −4° to −6° = Strong draw / hook territory

Positive F2P = face open to path = fade/slice. Negative F2P = face closed to path = draw/hook. You can swing dramatically out-to-in (negative path) and still hit a draw — if your face is closed enough to that path. Fix F2P, fix shot shape.

⑩ Dynamic Loft

Dynamic Loft

The Actual Loft Delivered at Impact — Not the Stamped Loft

Dynamic loft is the real loft of the clubface at impact, changed by shaft lean, wrist angle, and attack angle. It is the primary driver of launch angle and contributes significantly to spin rate. For irons, dynamic loft should always be less than stamped loft — this is what forward shaft lean achieves.

Dynamic Loft Targets

Driver: Optimal 12–15° · Too high >18° (ballooning) · Too low <10° 7-Iron: Optimal 18–22° (stamped loft ~32°; lean reduces it) PW: Optimal 30–36° (stamped loft ~44–48°)

If your dynamic loft equals your stamped loft on irons, you have no forward shaft lean — a significant power and trajectory problem indicating an early release or scoop at impact.

⑪ Spin Loft

Spin Loft

The Efficiency of the Glancing Blow

Spin Loft = Dynamic Loft minus Attack Angle. It represents the angle between the direction the club is travelling and the direction the face is pointing. Higher spin loft = more glancing blow = less ball speed, more spin. Lower is more efficient for driver distance; higher creates the spin needed for wedge control.

Spin Loft Targets

Driver (efficient): 12–16° · Above 20° = speed lost to spin 7-Iron (balanced): 40–47° PW (short game): 50–58° · Higher = more spin, more control

For driver distance: reduce spin loft by improving attack angle (more ascending) and reducing dynamic loft. This is the primary driver distance optimisation lever — more impactful than shaft or ball changes.

⑫ Low Point

Low Point

Where the Swing Arc Bottomed Out Relative to the Ball

Measures where the bottom of the club's arc occurred relative to the ball position, in inches. Positive = ahead of (in front of) the ball — correct for irons. Negative = behind the ball — the primary cause of fat shots. Low point is the definitive diagnostic for fat/thin contact.

Low Point Standards

Tour (irons): +1.0″ to +3.0″ ahead of ball Scratch: +0.5″ to +2.0″ ahead of ball 10 HCP: −0.5″ to +1.5″ (inconsistent) Fat shot: Low point −2″ or more (ground before ball) Thin shot: Low point too far ahead (ball below the arc)

Low point directly reflects weight transfer at impact. If low point is consistently behind the ball, weight is staying on the trail side. The TRS Slider training aid is specifically designed to fix this.

⑬⑭ Vertical and Horizontal Swing Plane

Vertical Swing Plane — Diagnostic Benchmarks

Steep vs. Flat — What the Numbers Mean

Vertical swing plane measures the angle of the club's arc relative to the ground. It is closely related to, but distinct from, attack angle. A steep plane predicts a steep attack angle and out-to-in path tendency; a flat plane predicts a shallow attack and in-to-out tendency.

Club	Optimal Range	Steep (Fault)	Flat (Fault)
Driver	45–52°	>56° → over-the-top risk	<40° → push/hook risk
5-iron	55–62°	>68° → fat/pull pattern	<48° → push/block pattern
7-iron	58–65°	>70° → fat/steep	<52° → sweep/thin
PW	62–70°	>75° → steep descend	<55° → sweep, low spin

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Two-variable combination: Steep vertical plane (+70°) with a normal attack angle (−4°) = fault lives early in the swing with a compensating recovery in the downswing. Normal plane (+62°) with a steep attack angle (−9°) = plane is correct but low point/weight transfer is the fault. These require completely different corrections — always read both numbers together.

Horizontal Swing Plane — Path Correlation

In-to-Out / Out-to-In Arc

Closely related to club path and measures the horizontal direction of the swing arc. Use alongside club path — they should agree. Significant divergence between horizontal swing plane and club path indicates swing arc inconsistency: the club is changing direction within the arc rather than tracing a consistent curved path.

Horizontal Plane	Typical Club Path	Ball Flight Pattern
−8° to −12° (out-to-in)	−5° to −9°	Consistent fade/slice; steep path
−2° to −5° (mild OTI)	−1° to −4°	Reliable fade pattern; common tour fade
0° to +2° (neutral)	0° to +1°	Straight / slight draw — tour standard
+3° to +6° (in-to-out)	+2° to +4°	Draw pattern; manageable shape
+7°+ (severe ITO)	+5°+	Push/hook; stalled hips

Flight Data

Six data points measuring the ball's behaviour in the air. These are the visible outputs of your impact and directional data.

⑮ Launch Angle

Launch Angle (Vertical)

The Angle the Ball Left the Ground

Launch angle is primarily determined by dynamic loft (minus approximately 30% due to friction). Most amateur golfers under-launch their driver significantly, costing carry distance. Optimal launch angle is speed-dependent — slower swingers need higher launch to maximise carry.

Launch Angle Targets by Club Speed

Driver (93–100 mph): Optimal Launch 14–16°, Spin 2,500–3,000 rpm Driver (100–108 mph): Optimal Launch 12–15°, Spin 2,200–2,700 rpm Driver (>108 mph): Optimal Launch 10–13°, Spin 1,900–2,400 rpm 7-Iron: Optimal Launch 16–20° PW: Optimal Launch 24–28°

Under-launching driver is the most common free-distance opportunity in amateur golf. Adjusting ball position and attack angle to move from 11° to 14° launch (with same spin reduction) can add 15–20 yards — no swing change required.

⑯ Launch Direction (Horizontal)

Launch Direction

The Initial Horizontal Angle the Ball Started On

The horizontal angle the ball started on — negative = left, positive = right. Should closely match your face angle calculation (83% of face angle). Use this to validate face angle data. If launch direction consistently diverges from the 83% prediction, suspect a setup aim problem or unusual gear effect from off-centre contact.

Validation Formula

Expected Launch Dir = Face Angle × 0.83 Face angle +4° → expected launch direction ~+3.3° If actual = +1.5°, face angle data may be read at different timing

⑰ Spin Rate

Spin Rate

Total Backspin — Trajectory, Distance, and Control

Spin rate in rpm reflects total backspin. High spin creates height and stopping power — but costs distance when excessive. Low spin = penetrating flight with roll, but can balloon in wind or fly too low to carry hazards.

Spin Rate Targets by Club

Driver: Optimal 2,000–2,700 rpm · Over 3,000 = too high · Under 1,800 = too low 3-Wood: Optimal 3,000–4,000 rpm 5-Iron: Optimal 5,000–6,000 rpm 7-Iron: Optimal 6,500–7,500 rpm PW full: Optimal 8,500–9,500 rpm SW full: Optimal 9,500–11,000 rpm

Driver over 3,000 rpm = too much dynamic loft and/or descending attack angle. Fix attack angle first. Driver spin under 2,000 = very fast swing speed (optimal) or potential contact mis-read — verify with smash factor.

⑱ Spin Axis

Spin Axis

The Tilt of the Spin — Why the Ball Curves

The tilt of the ball's rotational axis. A tilted axis creates gyroscopic lift on one side (Magnus effect), producing curve. Positive = right tilt = fade/slice. Negative = left tilt = draw/hook. Spin axis is the visual output of Face-to-Path. Never try to fix spin axis directly — fix Face-to-Path, and spin axis corrects automatically.

Spin Axis Reference

±3° = Minimal curve (straight shot) ±5°–8° = Clear shot shape (draw or fade) ±10°–15° = Strong shape (requires aim adjustment) ±20°+ = Hook or slice (reliability problem)

⑲ Apex Height

Apex Height

The Peak Height the Ball Reached

Maximum height in feet. For irons, a key scoring metric — low apex means the ball won't stop on firm greens. Very high apex on driver means excess spin. Apex is the combined product of launch angle and spin rate.

Apex Height Reference

Driver: Tour = 85–110 ft · Too low <60 ft · Too high >130 ft 7-Iron: Tour = 80–100 ft · 10 HCP = 60–80 ft PW: Tour = 100–120 ft · 10 HCP = 70–90 ft

Very high apex relative to distance = excess spin. This pairs with high dynamic loft and steep attack angle. Address those root causes — do not chase apex directly.

⑳ Curve

Curve

Total Lateral Movement of the Ball in Flight (Yards)

Total lateral movement in flight, in yards. Right = fade/slice. Left = draw/hook. This converts spin axis into a number your course management brain can use directly. A consistent 5–10 yards of same-direction curve is the hallmark of a reliable ball striker and a genuine scoring asset.

Curve Reference (Driver, ~250 yd carry)

0–5 yds = Straight (less reliable in wind) 5–15 yds = Workable shape (draw or fade — ideal) 15–30 yds = Strong shape (requires deliberate aim adjustment) 30+ yds = Hook or slice (reliability and scoring problem)

Consistency Metrics

Beyond single-shot readings, the Pro Package tracks statistical consistency across a session. These are often more revealing than any individual shot number.

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The Key Insight. A single shot is noise. Ten shots is a pattern. Fifty shots is a trend. Consistency metrics (standard deviations) separate genuine ball-strikers from those who got lucky. A player with 165-yard mean carry and ±6 std dev is more dangerous than a player with 170-yard mean and ±18.

Carry Standard Deviation

Carry Std Dev — Distance Consistency

How Tight Is Your Strike?

Carry Std Dev	Rating	What It Means
< 6 yds	Tour-level	Exceptional strike consistency. Carry is predictable for club selection.
6–10 yds	Scratch standard	Strong contact quality. Minor variations from off-centre misses.
10–15 yds	Acceptable	Noticeable inconsistency. Review smash factor variance shot to shot.
> 15 yds	Problem	Significant contact issue. TRS Ball + Mevo contact mapping session required immediately.

Lateral Direction Standard Deviation

Lateral Std Dev — Dispersion Width

Your Real Shot Dispersion on the Course

Lateral Std Dev	At 150 yds	Rating
< 3°	±8 yds L/R	Tour-level dispersion
3–5°	±8–13 yds	Scratch standard
5–8°	±13–21 yds	10 HCP typical — significant improvement available
> 8°	> 21 yds	High face/path inconsistency. Major scoring liability.

Smash Factor Standard Deviation

Smash Std Dev — Contact Location Consistency

Are You Finding the Sweet Spot Reliably?

Smash Std Dev	Rating	Action
< 0.02	Excellent	Contact location is highly consistent. No action needed.
0.02–0.04	Acceptable	Some face miss-hits occurring. Periodic TRS Ball check.
> 0.05	Problem	Contact quality is inconsistent. TRS Ball session is immediate priority.

Key Data Combinations

No single data point tells the full story. Expert analysis comes from reading combinations — the relationships between numbers that reveal the true cause of a shot pattern.

F2P + SPIN AXIS Shot Shape Engine P1 — Critical

Face-to-Path and Spin Axis are two measurements of the same phenomenon — the D-Plane. They should always correlate: positive F2P always produces positive (rightward-tilted) spin axis. This pair is your primary diagnostic for every directional problem.

F2P +5° · Axis +14°

Strong fade. Face well open to path. Grip/wrist change required. Check HackMotion.

F2P −3° · Axis −8°

Reliable draw. Face slightly closed to path. Tour-quality shape. Protect it.

F2P 0° · Axis 0°

Dead straight. Rare. Inherently unstable in wind. Slight draw is preferred long-term.

FACE + PATH + LAUNCH DIR Full D-Plane Diagnosis P1 — Critical

The complete shot diagnosis. Launch direction validates face angle (83% rule). F2P explains the curve. This combination eliminates all guesswork about what is causing a shot pattern.

Example Full Diagnosis

Face: +3° · Path: −5° · F2P: +8° (large fade) Launch Dir: ~+2.5° (confirms face dominant = starts right) Ball: starts right, fades further right Fix: Close face to path. Path change alone will not fix this.

AoA + DYN LOFT + SPIN RATE Spin Generator Diagnosis P1 — Critical

Spin rate is primarily a product of Spin Loft (Dynamic Loft minus Attack Angle). This combination tells you exactly which variable to adjust when spin is too high or too low.

AoA −4° · DL 18° · Spin 3,400 (Driver)

Spin Loft = 22°. Excessive. Fix: ascending AoA. Move ball forward, tee higher.

AoA +4° · DL 13° · Spin 2,300 (Driver)

Spin Loft = 9°. Optimal. Ascending attack + controlled loft = efficient driver.

AoA −8° · DL 30° · Spin 9,500 (7i)

Very steep. Spin Loft = 38°. Ball balloons. Flatten attack angle, maintain shaft lean.

CLUB SPD + SMASH + BALL SPD Distance Efficiency Audit P2 — Important

This trio tells you whether your distance problem is a speed problem or a contact quality problem — two completely different solutions requiring completely different training responses.

CHS 95 · Smash 1.44 · Ball 137

Speed needs work (Rypstick). Contact acceptable. Speed training is the lever.

CHS 105 · Smash 1.40 · Ball 147

Plenty of speed — contact losing 8 mph. TRS Ball + contact drills priority.

CHS 105 · Smash 1.48 · Ball 155

Excellent efficiency. Both speed and contact optimised. Focus on direction.

LOW PT + SMASH + AoA Iron Contact Diagnosis P2 — Important

For iron play, this combination identifies whether contact issues are caused by low point position (arc problem) or angle/plane issues. The fix is fundamentally different for each.

Low Pt −1.5″ · Smash 1.34 · AoA −2°

Arc behind ball. Too shallow. Move weight forward. Ball position back slightly.

Low Pt +2.0″ · Smash 1.36 · AoA −9°

Very steep. Good low point but thin contact likely. Shallow the attack angle.

Low Pt +1.5″ · Smash 1.41 · AoA −4°

Tour quality. Good arc, appropriate descent, efficient contact. Protect this.

LAUNCH + SPIN + APEX Trajectory Optimisation P3 — Useful

These three define the full trajectory shape and reveal whether distance is being lost to sub-optimal flight. For driver: high launch + low spin = maximum carry. For scoring irons: high apex = maximum stopping power.

Launch	Spin	Apex	Outcome
9°	1,800	50 ft	Too low. Knuckleball in wind. Contact / smash check needed.
13°	3,400	130 ft	Balloons. Over-spin from steep AoA. Attack angle fix needed.
14°	2,500	95 ft	Optimal. High launch, controlled spin — maximum carry.
16°	2,200	85 ft	Excellent for fast swings. Penetrating — highly wind resistant.

The D-Plane — Complete Framework

D-Plane (Definitive Plane) is the physics model that explains every ball flight. Understanding it deeply transforms how you read every Mevo session.

🔬

The D-Plane superseded the old ball flight laws. The old model said "path determines start direction, face determines curve." Modern FlightScope / TrackMan research proved the opposite: face controls ~83% of start direction; path controls curve via the face-to-path relationship. This changes everything about how you fix ball flight.

The Three D-Plane Laws

1. Start Direction ≈ (Face Angle × 0.83) + (Club Path × 0.17) 2. Curve = Proportional to Face-to-Path (F = Face Angle − Club Path) 3. Spin Axis ≈ F2P × 2.5–3.0 (approximate degree conversion) Positive F2P = Open face to path = Right axis tilt = FADE / SLICE Negative F2P = Closed face to path = Left axis tilt = DRAW / HOOK

Key practical insight: you can swing dramatically out-to-in and hit a draw — if your face is sufficiently closed to that path. Fix the face first. Path adjustment refines shape, not start direction.

9-Shot Shape Matrix

Face vs. Target	Path vs. Target	F2P	Ball Flight
Open (+4°)	Out-to-in (−5°)	+9° (large)	Push-slice: starts right, curves hard right
Open (+2°)	Slightly O-to-I (−2°)	+4° (moderate)	Fade: starts slightly right, curves right
Open (+1°)	Neutral (0°)	+1° (small)	Gentle fade: tour-quality controlled shape
Square (0°)	Square (0°)	0°	Straight: rare and unstable in wind
Closed (−1°)	In-to-out (+2°)	−3° (small)	Reliable draw: preferred stock shot
Closed (−3°)	In-to-out (+3°)	−6° (large)	Strong draw: requires deliberate aim left
Closed (−4°)	In-to-out (+5°)	−9° (very large)	Hook: uncontrollable left curve
Closed (−4°)	Out-to-in (−6°)	+2° (small)	Pull-fade: starts left (face), fades right (path)
Open (+5°)	In-to-out (+4°)	+1° (small)	Push-straight: starts right (face), minimal curve

D-Plane Fix Protocol

Correct Order of Operations

How to Fix Ball Flight Using Mevo Data

1
Identify start direction error. Check Launch Direction and Face Angle. Ball starting wrong = face problem. If starting right, face is open. Fix the face first — grip, wrist angle via HackMotion.
2
Identify curve error. Check F2P and Spin Axis. Too much curve = F2P too large. Reduce F2P by closing face to path, changing path, or both.
3
Do not chase path alone. The most common coaching error: player slices, teacher says "swing more right" (path only). Path changes shift start direction more than they reduce curve. Fix face first, then path.
4
Validate with Spin Axis. After any change, spin axis must move toward 0. If spin axis didn't budge after a face change, the change has not reached impact — continue the intervention.

Gear Effect — The D-Plane Override

When Off-Centre Contact Changes Everything

Gear effect operates entirely independently of face angle and path. When the ball is struck off-centre, the clubhead rotates around its CG at impact, imparting additional spin axis tilt that modifies — or completely overrides — the D-Plane prediction. This is the most commonly overlooked variable in ball flight diagnosis.

Strike Location	Gear Effect	Change vs. D-Plane Prediction
Toe strike	+draw spin (3–7° axis)	Less fade / more draw than F2P predicts
Heel strike	+fade spin (3–7° axis)	More fade / less draw than F2P predicts
Centre strike	None	D-Plane predicts ball flight accurately
High face (driver)	−300–500 rpm spin	Higher launch, less curve, more carry
Low face (driver)	+300–600 rpm spin	Lower launch, more curve, distance loss

⚠️

Diagnostic signal: If your spin axis varies widely shot-to-shot despite stable F2P readings, gear effect from inconsistent contact location is overriding the D-Plane. TRS Ball + impact tape is the correct diagnostic. Fix contact quality before making any face/path adjustments — otherwise you are correcting for a variable that changes with every strike.

Real-World Example

F2P +3° (fade) + consistent toe strike gear effect (−5° axis) = net −2° draw axis
Result: player draws the ball despite an open-face-to-path relationship

"Fixing path" in this scenario makes things worse — the toe strike is the actual problem.

Elite Benchmarks

Tour, scratch, and 10-handicap benchmarks for every key metric. Use as a reference framework — not a ceiling — when evaluating your data against your improvement trajectory.

Driver Benchmarks

Metric	Tour	Scratch	10 HCP	Typical Amateur
Club Speed	113 mph	108 mph	96 mph	88 mph
Ball Speed	167 mph	160 mph	141 mph	128 mph
Smash Factor	1.48–1.49	1.46–1.48	1.42–1.45	1.37–1.41
Launch Angle	10.9–14°	13–15°	11–13°	9–12°
Spin Rate	2,650 rpm	2,500 rpm	3,100 rpm	3,600 rpm
Attack Angle	+1.3°	+2–3°	−1°	−3°
Apex Height	102 ft	95 ft	78 ft	65 ft
Carry Distance	270–295 yds	255–275 yds	225–245 yds	195–215 yds
Face to Path	±1–2°	±2–3°	±4–6°	±8–12°
Spin Axis	±3–5°	±5–8°	±10–14°	±15–22°

7-Iron Benchmarks

Metric	Tour	Scratch	10 HCP
Club Speed	92 mph	87 mph	80 mph
Ball Speed	128 mph	121 mph	111 mph
Smash Factor	1.40–1.42	1.38–1.41	1.35–1.38
Launch Angle	16–18°	17–19°	15–17°
Spin Rate	7,100 rpm	7,000 rpm	7,500 rpm
Attack Angle	−4.1°	−3° to −5°	−5° to −8°
Dynamic Loft	20.4°	21–23°	24–28°
Low Point	+1.5–2.5″	+1.0–2.0″	0–+1.0″
Carry Distance	175–185 yds	165–175 yds	148–160 yds
Carry Std Dev	±3 yds	±5 yds	±9 yds

Pitching Wedge Benchmarks

Metric	Tour	Scratch	10 HCP
Spin Rate (full)	9,200 rpm	8,800 rpm	7,500 rpm
Launch Angle	26–30°	25–28°	22–26°
Dynamic Loft	32–35°	34–37°	38–42°
Carry Std Dev	±3 yds	±5 yds	±9 yds
Apex Height	100–120 ft	90–110 ft	70–90 ft

Fault Finder

Start with the ball flight problem you observe. Work through the diagnostic chain to the root cause in your data. Never guess — let the numbers lead the diagnosis.

🔴 Slice / Strong Fade

Ball starts right, curves further right

Root Cause Diagnosis

Check First

Face Angle

Open face (+4° or more) = ball starts right. Face is 83% of start direction. Almost always the primary fault.

Check Second

Face to Path

Large positive F2P (+5°+) = excessive rightward curve. Close the face relative to path, not just relative to target.

Check Third

Club Path

Out-to-in path amplifies fade. But path alone does not cause a slice — F2P does. Fix face first, then path.

Fix sequence: Strengthen grip → check HackMotion wrist angle (reduce extension) → confirm face angle moves toward 0 or negative → F2P reduces → spin axis reduces → curve reduces.

🟡 Distance Loss

Shorter than you should be

Three-Step Distance Diagnosis

Step 1

Smash Factor

Below 1.44 (driver)? Contact is the distance thief. No fitness or speed work will fix a contact problem.

Step 2

Launch + Spin

Under-launching or over-spinning? Low launch + high spin = attack angle problem. Free yards available with no swing change.

Step 3

Club Speed

If smash and trajectory are optimal but distance is still short, club speed is the ceiling. Rypstick protocol required.

🔵 Fat / Heavy Iron Shots

Hitting ground before the ball

Arc and Weight Transfer Diagnosis

Primary

Low Point

Low point at 0″ or negative = arc bottoming behind the ball. Weight not transferring to lead side at impact.

Confirm

Attack Angle

Fat + shallow AoA = weight hanging back. Fat + very steep AoA = ball too far forward. Different fixes for each.

Validate

Smash Factor

Fat shots dramatically reduce smash factor (1.25–1.32). This confirms and quantifies the low point problem.

🟣 Inconsistency — Different Ball Flight Every Shot

Ball goes different places each swing

Consistency Variance Diagnosis

Check

Smash Std Dev

High smash variance (>0.04) = contact location inconsistency. TRS Ball contact session is the immediate priority.

Check

F2P Variance

F2P varying shot-to-shot? Face angle is inconsistent. HackMotion wrist audit — you are releasing differently each swing.

Check

AoA Variance

Attack angle varying >4° shot-to-shot? Swing arc is unreliable. Low point training with TRS Slider.

🟢 High Spin on Driver — Ballooning

Ball peaks high and falls short

Excess Spin Diagnosis

Primary

Attack Angle

Descending AoA on driver is the #1 cause. Move ball forward, tee higher, flatten attack angle. Free yards.

Secondary

Dynamic Loft

Dynamic loft >18° on driver = too much loft at impact. Check for early release or flip through impact.

Confirm

Spin Loft

Spin Loft >20° (driver) = inefficient glancing blow. Reducing spin loft is the primary distance optimisation target.

Session Protocols

How to structure Mevo sessions to extract maximum intelligence. Accumulate data deliberately — one shot is noise, ten shots is a pattern, fifty is a trend.

📋

The Golden Rule. Never mix diagnostic and improvement work in the same session. Diagnostic sessions capture your current baseline with no swing thoughts. Improvement sessions use training aids and specific intents. Data from an improvement session is not your baseline — it is your work in progress.

Monthly Baseline Session — 45 min

Your Handicap in Numbers

The Most Important Session You Will Run — Monthly

1
10 Driver shots: Normal swing, no swing thoughts, record every metric. Calculate averages. Compare against previous month. Any metric moving more than 3% = trend requiring investigation.
2
10 × 7-Iron shots: Focus on smash factor, attack angle, dynamic loft, low point, and carry std dev. These are your iron striking benchmark numbers.
3
10 × PW shots: Full swing only. Carry std dev is the critical metric — it directly represents scoring proximity potential from 100–130 yards.
4
Export and analyse: CSV to myflightscope.com, then import into the AI Coach tool. Identify the one or two metrics that moved most vs. last month — those are your next training priorities.

Wedge Matrix Build — 60 min, Quarterly

Build Your Personal Distance Chart

The Most Direct Scoring Tool the Mevo Produces

1
5 shots per club per swing length: PW, GW, SW, LW × full (12 o'clock), ¾ (10 o'clock), ½ (9 o'clock), ¼ (7 o'clock) = 80 shots total. Record mean carry and spin rate for each combination.
2
Note spin rates: Your spin rate at each distance is your proximity predictor. Low spin at ¾ wedge = grip or delivery issue reducing stopping power.
3
Laminate the matrix: 16 cells (4 clubs × 4 lengths). Carry it. Use it on the course. This chart alone saves 3–5 shots per round from chronic under-clubbing.

Speed Tracking Session — 20 min, Weekly

Rypstick + Mevo Integration

Measuring Speed Gains and Transfer

1
Pre-Rypstick baseline: 3 driver shots before any speed work. Record club speed. This is your "cold" baseline for the session.
2
Post-Rypstick check: After Rypstick protocol, hit 3 driver shots. Compare club speed and smash factor. Speed gain with no smash factor loss = efficient, transferable speed gain.
3
Track weekly trend: Chart club speed over 8 weeks. Target +5% improvement. Any week-over-week drop greater than 2% = potential fatigue. Rest before continuing speed work.

D-Plane Fix Session — 30 min

Ball Flight Correction Protocol

Systematic Face / Path Correction Using the Data

1
5-shot diagnostic block: Normal swing, record face angle, path, F2P, spin axis. Establish today's baseline.
2
Isolate the face: Make a grip or wrist change (using HackMotion feedback). Hit 5 shots. Confirm face angle has moved. Validate with launch direction (83% rule).
3
Confirm F2P has reduced: The face change must reduce F2P — not just face angle. If F2P remains unchanged, path has compensated and a path adjustment is also needed.
4
5-shot confirmation block: With the change feeling natural, hit 5 shots without consciously thinking about it. This tests whether the change is grooved or merely forced. The data will tell you the truth.

Iron Contact Session — 30 min

Low Point + Smash Factor Improvement

Arc and Contact Quality Work

1
Establish low point baseline: 10 × 7-iron shots, record low point mean and std dev. Below +0.5″ mean or more than 1.5″ std dev = arc problem requiring immediate attention.
2
TRS Slider drill: 20 reps. Immediately follow with 7 shots on the Mevo. Compare low point to baseline — should move toward +1.5″ ahead of ball.
3
Track smash factor response: As low point improves, smash factor should increase. This feedback loop confirms the change is reaching impact — not just feel.

Mevo Gen2Expert Playbook

The Data Hierarchy

Was the strike efficient?

Where did the ball start and curve?

Did the ball fly optimally?

Ball Data

The Speed the Ball Left the Clubface

The Raw Speed of the Clubhead at Impact

Contact Efficiency — The Most Underrated Metric

Why Carry Is the Only Number That Matters for Club Selection

Club Data — Pro Package

The Vertical Direction the Clubhead Was Travelling at Impact

The Horizontal Direction the Clubhead Was Travelling at Impact

Where the Clubface Was Pointing at Impact — Controls 83% of Start Direction

The Relationship Between Face and Path — Most Important Single Combination

The Actual Loft Delivered at Impact — Not the Stamped Loft

The Efficiency of the Glancing Blow

Where the Swing Arc Bottomed Out Relative to the Ball

Steep vs. Flat — What the Numbers Mean

In-to-Out / Out-to-In Arc

Flight Data

The Angle the Ball Left the Ground

The Initial Horizontal Angle the Ball Started On

Total Backspin — Trajectory, Distance, and Control

The Tilt of the Spin — Why the Ball Curves

The Peak Height the Ball Reached

Total Lateral Movement of the Ball in Flight (Yards)

Consistency Metrics

How Tight Is Your Strike?

Your Real Shot Dispersion on the Course

Are You Finding the Sweet Spot Reliably?

Key Data Combinations

The D-Plane — Complete Framework

How to Fix Ball Flight Using Mevo Data

When Off-Centre Contact Changes Everything

Elite Benchmarks

Fault Finder

Root Cause Diagnosis

Three-Step Distance Diagnosis

Arc and Weight Transfer Diagnosis

Consistency Variance Diagnosis

Excess Spin Diagnosis

Session Protocols

The Most Important Session You Will Run — Monthly

The Most Direct Scoring Tool the Mevo Produces

Measuring Speed Gains and Transfer

Systematic Face / Path Correction Using the Data

Arc and Contact Quality Work

Mevo Gen2
Expert Playbook