D-Plane sources & methodology

Explore the source registry, evidence categories and model limitations behind D-Plane Lab.

The source registry does not imply that every application coefficient has been calibrated.

• CIT-01: D-Plane EXPLAINED!!!!!! — Brian Manzella

  Transition from Traditional Ball Flight Laws to Modern D-Plane; inclined plane path shifts. · COACHING_HEURISTIC

• CIT-02: The D Plane — The Swing Engineer™

  Explicit 3D vector cross-product formulation (N_D = V_club × N_face), spin-axis orthogonality, and Magnus force vector math. · EXACT_GEOMETRY

• CIT-03: D-Plane Golf: What is it? — The DIY Golfer

  3D vector decomposition, vertical gear effect, aerodynamic flight forces, and slope loft shifts. · EDUCATIONAL_APPROX

• CIT-04: The Physics of Golf (1st ed. 1994 / 2nd ed. 1999) — Dr. Theodore P. Jorgensen

  Original mathematical formulation of the Descriptive Plane (D-Plane), 3D collision mechanics, and aerodynamic Magnus lift equations. · EXACT_GEOMETRY

• CIT-05: Authorized D-Plane Instructor Note on Jorgensen & TrackMan — Bob Grissett Golf

  Historical link between Jorgensen (1992) and TrackMan empirical validation. · COACHING_HEURISTIC

• CIT-06: Trackman and ball flight laws — GolfWRX Instruction & Academy

  Empirical radar validation of new ball-flight laws. · EVIDENCE_BASED_APPROX

• CIT-07: WEDGE PLAY: Square stance or open stance and what the D-Plane says… — Daniel Gray, PGA Professional

  Stance alignment, ball position, wedge D-Plane behavior, and multi-perspective views (FR-06). · COACHING_HEURISTIC

• CIT-08: Golf Club Path: What Is It & How It Relates to Club Face Angle? — Titleist Learning Lab

  Club Path (θ_path), Face Angle (φ_face), and initial launch direction dominance (75%–85%). · EVIDENCE_BASED_APPROX

• CIT-09: Clark: Understanding The D Plane — GolfWRX

  Low point, ball position in stance, inclined arc geometry, and uphill/downhill path shifts. · EXACT_GEOMETRY

• CIT-10: The Influence of Face Angle and Club Path on the Resultant Launch Angle of a Golf Ball — Sports Engineering

  Bibliographic lead on face angle, club path, and resultant launch angle. The specific launch-efficiency constants used by this application and their supporting source table/equation have not been independently verified. · EDUCATIONAL_APPROX

• CIT-11: D Plane Tilt | Shot Data — PARennial Golf

  D-Plane tilt angle (τ_spin) sign convention and relationship to horizontal curvature (FR-02). · EXACT_GEOMETRY

• CIT-12: Club Path/Face to Path Optimal or Acceptable Ranges — The Sand Trap

  Attack Angle path-shift table (Driver +4° → -2.8° path; Wedge -6° → +3.4° path) and Tour Draw / Fade / Slice preset benchmarks. · EVIDENCE_BASED_APPROX

• CIT-13: The truth about spin: How to spin it like the pros — GolfWRX

  Spin Loft (α_spin) vs. oblique friction, backspin generation, and headwind spin-loft reduction strategy. · EVIDENCE_BASED_APPROX

• CIT-14: Mats VS Grass – What's the Difference? — TrackMan Golf Blog (Japan / Global)

  Spin Loft, Smash Factor, spin-rate generation, and turf/mat friction limitations (NOT_CALCULATED_MVP disclosure). · EVIDENCE_BASED_APPROX

• CIT-15: Launch Monitor Glossary — SimSights Golf

  Parameter definitions, operational ranges, and horizontal/vertical strike offset conventions. · VENDOR_DEFINITION

• CIT-16: The "Critical 5" — Brian Manzella

  Qualitative coaching discussion of attack angle, swing direction, and club path. It does not establish a universal equation or the app’s exact fixed-plane derivation. · EDUCATIONAL_APPROX

• CIT-17: A novel system for motion capture post-processing for the golf swing — Skemman University Repository (MSc Thesis)

  3D kinematic post-processing, micro-impact frame orientation, and off-center dynamic face twist mechanics (FR-04). · EXACT_GEOMETRY

• CIT-18: Impact Offset | Shot Data — PARennial Golf

  Toe/Heel horizontal gear effect torque mechanics and dynamic face opening/closing (FR-04). · EDUCATIONAL_APPROX

• CIT-19: Golf Simulator Launch Monitors — LaunchHouse Golf

  Terrain slope simulation (FR-05) and multi-vendor launch-monitor data interoperability. · EDUCATIONAL_APPROX

• CIT-20: Trackman: The King of Launch Monitors? — GolfBays

  Radar tracking context and session data schema interoperability. · VENDOR_DEFINITION

• CIT-21: The Best Golf Simulators for Coaches — GolfBays UK

  Lesson bay teaching requirements and multi-monitor presentation ergonomics. · COACHING_HEURISTIC

• CIT-22: Semantic Scholar Paper Reference (25f819f96d8518f11b9e4c4aefe847493b308170) — Semantic Scholar Archive

  Prompt reference anchor for biomechanical & sports-science synthesis. · EVIDENCE_BASED_APPROX

• CIT-23: What is Spin Loft? — TrackMan Golf Official Definition — TrackMan A/S

  TrackMan defines spin loft as a 3D angle between clubhead movement direction and face orientation. This definition does not validate application coefficients. · VENDOR_DEFINITION

• CIT-24: What is Spin Axis & Launch Angle? — TrackMan Golf Definitions — TrackMan A/S

  TrackMan source record for spin-axis and launch-angle terminology. Check the current source-specific evidence matrix for claims reviewed on 2026-10-18. · VENDOR_DEFINITION

• CIT-25: React Three Fiber Documentation — Poimandres

  Declarative <Canvas frameloop="demand">, invalidate(), ThreeElements TypeScript types, and resource disposal rules. · EXACT_GEOMETRY

• CIT-26: Three.js Documentation — Ricardo Cabello (mrdoob) and Three.js Contributors

  ShaderMaterial, BufferGeometry, Quaternion, Matrix4, and WebGL capability / context-loss handling. · EXACT_GEOMETRY

• CIT-27: Web Content Accessibility Guidelines (WCAG) 2.2 — World Wide Web Consortium (W3C)

  SC 1.1.1 (Live text state summary), SC 1.4.1 (Non-color vector encoding), SC 2.5.7 (Drag alternatives), SC 2.5.8 (Target size). · EXACT_GEOMETRY

Verified claims and boundaries

• What is Spin Loft?

  Defines spin loft as the three-dimensional angle between club movement direction and face orientation.

  Supports the definition only; it does not validate this app’s empirical coefficients.

• What is Smash Factor?

  Defines smash factor as ball speed divided by club speed.

  Supports the ratio identity; examples do not establish universal target ranges.

• 40+ Trackman Parameters

  Defines carry at equal-elevation crossing, curve relative to launch direction, side relative to target line, total distance including calculated rest, and parameter-specific club reference locations/times: Club Speed at the geometric center before first contact; Attack Angle and Club Path at the geometric center at maximum compression; Dynamic Loft and Face Angle at the face/ball center-point at maximum compression.

  These are vendor parameter definitions; radial carry and downrange distance are distinct measures. The app uses an idealized single delivery input frame, not OEM measurement parity.

• Understanding Club Data in Golf

  Discusses CoG versus face-center reference methodologies and cautions that outputs based on different reference points may not be comparable.

  This article’s CoG/face-center discussion is not a universal statement that every club-motion parameter is measured at CoG before impact; see the parameter-specific timing in the 40+ Trackman Parameters page. The app does not claim OEM measurement parity or validated gear-effect coefficients.