Summary

A coupler that may be used to join a model rocket nose cone to the main body tube. This is especially useful for a split halves nose cone as in the Eggloft Egg Rocket Nose Cone here: http://www.thingiverse.com/thing:2228825

The top setback portion is available area to tape the shoulder of the nose cone to this coupler. This length in combination with the length of the nose cone shoulder should be enough to accommodate the width of the tape that will be used.

The hole in the bottom allows an eyelet to be screwed in to the coupler for tying to the shock cord.

Estes body tube dimensions
Ref: http://www.estesrockets.com
Inner diameters:
BT-5: 13.2mm
BT-20: 18.0mm
BT-50: 24.1mm
BT-55: 32.6mm
BT-60: 40.5mm
Outer diameters:
BT-5: 13.8mm
BT-20: 18.7mm
BT-50: 24.8mm
BT-55: 34.0mm
BT-60: 42.0mm

The STL file included here is for coupling a nosecone with a BT-20 fitting into a BT-50 body tube. You may want to generate your own STL with the Customizer to optimize it for your own printer tolerances.

Changelog:

• 2017-05-07: File creation
• 2017-06-08: Added fillet/chamfer feature to bottom of coupler for easier body tube insertion.