BNC-50BA — Revision B — ESTIMATED
Source identity: BNC-50BA_70257

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: 24.79 mm
Exposed height including features: 33.02 mm (excludes shoulder)
Shoulder: 24.13 mm diameter x 12.70 mm long
Overall X x Y x Z: 24.79 x 24.79 x 45.72 mm
Evidence confidence: medium. 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:
BOMARC ramjet nacelle uses a stepped annular lip and central conical spike. The source's simple-cone simulation approximation is replaced by this guessed inlet morphology at the published envelope size.

Estimated fields:
- Meridian station locations and intermediate radii
- Unmeasured tip/collar details
- Inlet recess and spike width

See MODEL_RECORD.json for the complete original source record and evidence.
Sources:
https://github.com/dbcook/openrocket-database/blob/master/orc/estes_classic.orc

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
