| Centering Rings For Model Rockets |
To center BT20 (18mm) motor tubes in BT50 tubes, 24mm engine blocks can be used.
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BT55/BT20 Centering Rings (pack of 6)
Use these plywood centering rings to install a BT20 motor mount (18mm) into a BT55 body tube. This is a pack of six rings, which includes 3 rings with an engine hook notch and three rings without.
| | $5.45
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BT60/BT20 Centering Rings (pack of 6)
Plywood centering rings to make three motor mounts. Used to put a BT20 motor mount (18mm) into a BT60 model rocket airframe. To be used with Estes A-C motors and Aerotech 18mm rocket motors. Six rings total, 3 with an engine hook notch, three without.
| | $5.85
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BT60/BT50 Centering Rings (pack of 6)
Enough centering rings to build three motor mounts. Use these to install a BT50 motor mount (24mm) into a BT60 body. For use with Estes D-E motors and Aerotech 24mm motors. A total of six centering rings total, 3 with engine hook notch, three without.
| | $5.95
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BT80/BT20 Centering Rings (pack of 4)
Used to center a BT20 motor mount (18mm) into a BT80 model rocket body tube. 18mm rocket motors include Estes A-C, Aerotech 18mm motors (single use or reload). Pack of four rings, two with an engine hook notch, two without.
| | $6.45
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BT80/BT50 Centering Rings (pack of 4)
Two sets of centering rings, to build two motor mounts. Install a BT50 motor mount (24mm) into a BT80 body tube. 24mm model rocket motors include Estes D-E, and Aerotech 24mm motors. Four centering rings total (2 sets), two with engine hook notch, two without.
| | $6.55
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