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Here's another 3D model you can download for free from Thingiverse and print on your 3D printer.
This is an upscale of the BT-50 simulated nozzle (Estes Part No. 072665) that is designed to fit Estes and Rocketarium BT-80 airframe tubing.
There are three models that will either fit a 29mm or 38mm motor mount tube:
1) No shoulder,
2) Short shoulder (about 12mm tall or 1/2 inch),
3) Tall shoulder (about 25mm tall or 1 inch).
https://www.thingiverse.com/thing:4933520
This is an upscale of the BT-50 simulated nozzle (Estes Part No. 072665) that is designed to fit Estes and Rocketarium BT-80 airframe tubing.
There are three models that will either fit a 29mm or 38mm motor mount tube:
1) No shoulder,
2) Short shoulder (about 12mm tall or 1/2 inch),
3) Tall shoulder (about 25mm tall or 1 inch).
https://www.thingiverse.com/thing:4933520
