BT-70 to BT-80 Body Tube Adapter

Give student teams more room to explore original rocket designs with the Estes BT-70 to BT-80 Body Tube Adapter. By connecting two different body tube sizes, this component helps learners move from a design sketch to a physical model with a smooth transition between sections.

Make Component Selection Part of the Lesson

Choosing parts that work together is an important step in any engineering project. This adapter gives students a concrete way to explore how tube sizes, shoulder dimensions, and overall length influence their design choices.

Plan with Specific Measurements

The adapter measures 6.29 inches long and features a BT-70 shoulder outside diameter of 2.17 inches and a BT-80 shoulder outside diameter of 2.55 inches. Have teams use these dimensions to identify matching body tubes and document their component choices before assembly.

Support Custom Builds and Replacement Needs

This adapter is used in the ARC Parts - Centering Rings and Parachute Bundle, Competition Rocket Starter Bundle, and Pro Series II™ Parts Assortment. Add it to your program's building supplies for original student projects or use it as a replacement part when a compatible rocket needs rebuilding.