Space Shuttle1284 external-tank nose — Revision B — ESTIMATED
Source identity: HIST_SHUTTLE_ET_BT67

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: 51.80 mm
Exposed height including features: 73.00 mm (excludes shoulder)
Shoulder: 50.50 mm diameter x 19.05 mm long
Overall X x Y x Z: 51.80 x 51.80 x 92.05 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:
Brohm's BT-67 Shuttle1284 entry is the external-tank forward cap. A51.8mm ST-20/BT-67-family seating diameter is assumed. The photograph/instruction role supports a rounded pointed tank dome;73mm exposed length, nominal shoulder and intermediate contour are estimates.

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://www.oldrocketplans.com/estes/est1284/est1284.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
