BLU-97B model-kit rounded cap — Revision B — ESTIMATED
Source identity: HIST_PN_060558_060559_BLU97B

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: 56.31 mm
Exposed height including features: 45.00 mm (excludes shoulder)
Shoulder: 55.24 mm diameter x 12.70 mm long
Overall X x Y x Z: 56.31 x 56.31 x 57.70 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:
The Estes2005 catalog page18 directly shows the model-kit cap: broad rounded dome with a narrow raised button. BT-70 gives the nominal56.31mm seating diameter. The45mm exposed height, dome breakpoints, small button and shoulder are estimates from the catalog image. This models only the inert exterior cap.

Estimated fields:
- Overall exposed shape length
- Meridian stations and tip shape
- Nominal shoulder diameter and length
- Detail dimensions and positions

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
https://modelraketten.nl/educatie/download/CatalogusEstes/Estes_2005_Catalog.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
