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Prototype — in the loopPrototype 001

OURO 001

The first revolution of the loop.

A compact mallet built around the player's sightline. Additional alignment development remains underway. This page updates as the data arrives.

Head design is in CAD and alignment-study validation. The images and interactive model below are CAD renders — real machined-billet photography replaces them as the prototype comes off the machine.

02Engineering story

Nothing is meant to reach steel because it’s fashionable. The aim is for it to reach steel because it held up through the loop.

Start from the miss

001 began as an error budget, not a shape.

Published aim-study literature is blunt about where putts die: misaim of a degree or more at address is commonly reported among golfers, well inside a tolerance a straight twelve-foot putt can't afford. That's context from the literature, not an OURO test result — but it set the design brief for 001 backwards from the miss: give the player's eyes the best possible chance of setting the face square before the stroke ever begins.

Perception is the first constraint

Before a single curve was drawn, we mapped the visual problem. How eye dominance shifts perceived line. How parallax moves an aim point when the eyes sit inside or outside the ball. How contrast and edge geometry pull the gaze. That map — not styling — set the head's proportions, the topline treatment, and the candidate sightline systems now under study.

The alignment system on 001 is not being finalized by opinion. The first study has already run: a geometry screening across bare heads — no sightline, no mark — found wing forward-sweep angle to be the dominant geometric influence on where golfers aim at address. That result informs 001's current CAD direction and starting geometry, which remains subject to prototype evaluation, design-for-manufacture, sightline testing, and further validation before anything is called final. The write-up, charts included, lives in the journal. Additional alignment development remains underway.

Sound is a specification

Impact sound is one important contributor to perceived feel and is a variable OURO plans to study. OURO is developing a controlled acoustic test method for future prototype comparisons.

Why milling is the plan

001 is a mallet, machined from solid billet. Single-setup machining feasibility and reference control will be evaluated before production. Dimensional inspection requirements will be established before production.

First articles will come off the machine, get measured against the drawing, and the numbers will land on this page — tolerances included. Until then, every figure above is labeled for what it is: a target.

What happens next

The loop runs: aim-study of the alignment system, first billet prototypes, acoustic measurement, player testing. Each pass updates this page. No number appears here until it's been measured.

03Specifications

The numbers, as they stand.

Head

Construction
One-piece, CNC-milled from billet
Material
1018 carbon steel
Head weight
375 g (target)
Finish
TBD — glare-tested at address

Geometry

Loft
3.0° (target)
Lie
70° (target)
Length
33" / 34" / 35"
Toe hang
TBD by fitting study

Alignment system

Sightline system
Under aim-study validation
Alignment development
Additional alignment development remains underway

Manufacturing

Critical surfaces
Single-setup machining feasibility and reference control will be evaluated before production
Face tolerance
Published when first articles are inspected
Build record
Dimensional inspection requirements will be established before production

All values are design targets. Measured numbers replace them as prototypes come off the machine — we publish what we verify, nothing sooner.

04Testing & proof

If we make a performance claim, it must trace to a measurement.

Aim & alignment — head geometry

Measured

Screening study isolating how mallet head shape alone biases static aim, with all sightlines and alignment aids removed. Wing forward-sweep angle proved the dominant factor; flange depth and topline thickness showed no measurable effect. Full write-up in the journal.

Aims recorded
3897 golfers, 10 test heads, randomized order
Face-angle resolution
~0.02°Overhead machine-vision gauge
Wing sweep effect (20°→30°)
0.38° squarerMixed-effects model, p = 5.3×10⁻⁵; robust across sensitivity checks

Method · 2⁴⁻¹ fractional-factorial screening DOE across four geometric factors; face angle measured at address by validated machine-vision gauge.

Updated 2026-07-14

Aim & alignment — sightline

In progress

The geometry-track results now inform the current CAD direction and starting geometry — subject to prototype evaluation, design-for-manufacture, sightline testing, and further validation. Additional alignment development remains underway.

Numbers appear here when the study is done — measured, not promised.

Method · Method to be determined as alignment development continues.

Updated 2026-07-14

Acoustic signature

Planned

Impact sound is a design variable OURO plans to measure during prototype development. OURO is developing a controlled acoustic test method for future prototype comparisons.

Numbers appear here when the study is done — measured, not promised.

Method · Method to be determined.

CG & MOI

Planned

Center of gravity and moment of inertia verified against the CAD model on first articles. Published as measured, alongside the design targets they're checked against.

Numbers appear here when the study is done — measured, not promised.

Method · Physical measurement on first articles, compared to CAD-predicted values.

Machining tolerances

Planned

Dimensional inspection requirements will be established before production.

Numbers appear here when the study is done — measured, not promised.

Method · To be determined.

05Follow this build

OURO 001 is in the loop.

Follow the engineering journal — studies, machining, failures and all — and be first in line when it's ready.

No spam. Just the build.