Sample evaluation utilizes a 100-point blind protocol: Flight stability & spin axis (35 pts), smash fatigue durability (30 pts), acoustic crack & touch feedback (20 pts), cork shape retention (15 pts). The benchmark: Two competitive doubles pairs perform 50 consecutive full-power smashes with zero quill fractures, cork splitting, or flight wobble.
1. Eliminating Brand Bias: The Blind Testing Protocol
Cork dome decals and neck tapes are masked with neutral labels (Sample A, B, C). Four advanced doubles players test samples in the same sports hall using uniform racquet string tensions (26–28 lbs), recording data independently.
2. 100-Point Evaluation Scorecard & Weightings
| Evaluation Dimension | Weighting | Testing Maneuver & Benchmark | Excellence Pass Line |
|---|---|---|---|
| Flight Stability & Spin Axis | 35 Points | Clears & flat drives: zero wobble, vertical steep terminal descent | ≥ 31 Points |
| Smash Fatigue Durability | 30 Points | 50 full-power forehand smashes: zero quill breaks, no medullary softening | ≥ 26 Points |
| Touch, Feel & Acoustics | 20 Points | Drops & net tumbling: crisp sound, direct elastic string feedback | ≥ 17 Points |
| Cork Shape Retention | 15 Points | Caliper check after smashes: roundness variance <0.2mm, no delamination | ≥ 13 Points |
3. The 'Golden Sample' Quality Locking Agreement
Winning sample batches are sealed in duplicate as 'Golden Samples': one retained by the buyer, and one archived in the factory QA vault as the physical benchmark for bulk mass production inspection.
Technical & Sourcing FAQs
How can prospective buyers request evaluation sample kits?
You can request evaluation samples directly via our Sample Portal (/sample) or WhatsApp. We dispatch evaluation sample kits within 24 to 48 hours via express air courier.
How many shuttles should be play-tested per model?
We recommend play-testing 3 to 6 shuttles completely per model across multiple doubles pairs to compile an accurate statistical average of durability.
How does the factory ensure bulk mass production matches approved samples?
Sample specifications (feather lot, cork formula, weight tolerance, glue grade) are written into the binding production contract, drawing from the same raw material reserves.
Need Certified Factory Samples or Custom OEM Quotation?
ShuttlecockOEM manufactures international-standard feather shuttlecocks across 52 configurations. Request our evaluation sample kit with rapid air courier delivery.
