NC-80 Rock-It irregular stone nose — Revision B — ESTIMATED
Source identity: HIST_PN_061465_ROCKIT

This free pack preserves the original STL and STEP geometry from the expanded
Estes Nose Cone Library B. All geometry is in millimeters.

Base diameter: 66.04 mm
Exposed height including features: 83.00 mm (excludes shoulder)
Shoulder: 65.02 mm diameter x 29.72 mm long
Overall X x Y x Z: 69.02 x 68.02 x 112.72 mm
Evidence confidence: low. This is not a numerical tolerance.

These models use educated estimates, including inferred dimensions and shapes.
They are solid exterior references for CAD editing, not verified replicas or
finished hollow flight parts. No printer clearance, original hollow interiors,
electronics or recovery hardware are included. Solid CAD does not prescribe
100% slicer infill. Digital geometry checks do not validate physical fit, mass,
strength or flight suitability. Check actual tubes and print fit yourself.

Why this shape was chosen:
Rock-It is represented as a rounded irregular rock-like cluster rather than a smooth sport nose. Lobes and stone contour are low-confidence educated estimates; original stone texture is omitted. Historical identity is supported by Brohm; dimensions and morphology beyond the cited facts are educated design estimates.

Estimated fields:
- profile.stations_mm
- shoulder_diameter_mm
- shoulder_length_mm
- features

See MODEL_RECORD.json for the complete original source record and evidence.
Sources:
https://www.rocketshoppe.com/info/Estes_Nose_Cone_Reference_10.1.pdf

The retained Apache 2.0 license applies to the OpenRocket source database
where used. It is not a new license for this entire model library.
Independent recreations; no Estes affiliation or manufacturer verification.

Full library, CAD source and original notes:
https://iterarocketry.com/nose-cones
Support: info@iterarocketry.com
