Start with the parts that must fit inside and onto your body tube. A familiar BT label is useful for browsing, but it is not a guarantee that tubes, couplers and nose cones from different suppliers match. These guides compare named products and explain which dimensions to check.
Tube material and diameter alone do not determine a rocket’s allowable motor, flight altitude or service life. Use this hub to narrow the material and fit questions, then review the complete design.
Find a tube that fits your components
- Body tube size chart: Supplier dimensions and the distinction between nominal names and actual fit.
- Body tube metric conversion: Convert published dimensions without confusing inside and outside diameter.
- BT-60 vs BT-70 body tubes: Compare named Semroc tubes and the space available for components.
- Tube wall thickness and motor-mount fit: Check the airframe opening, mount exterior and centering-ring interface.
- Tube coupler dry-fit and joint checks: Identify a permanent joint or separation point before bonding.
Match the nose cone to the tube
- Nose cone sizes and shoulder fit: Check the shoulder, tube opening and recovery clearance.
- Nose cone shapes: Compare shape, length and mass trade-offs.
Compare material, weight and cost
- Cardboard vs fiberglass body tubes: Compare specific products, construction, fit and finished mass.
- Phenolic vs fiberglass body tubes: Review product dimensions and whole-build considerations without a universal motor rating.
- Blue Tube vs phenolic: Identify the exact products before comparing finish and impact considerations.
- Lightest model rocket body tube: Compare supplier-listed mass at comparable length and geometry.
- Body tube cost per foot: Budget for usable length, shipping and matching parts.
- Body tube strength by diameter: Understand why nominal diameter is not a strength or motor-limit chart.
Before buying or cutting
Record the supplier and part number, inside and outside diameters, tube length and the dimensions of the mating components. Keep a supplier specification separate from a calculated value or an assumption. Resolve conflicting dimensions against the actual products before committing to a mount or coupler.
Space for a packed recovery system is another fit question. Continue to the recovery-system hub for canopy, cord and protection guides; fin choices belong in the fin hub.
For launch rules, consult the NAR Model Rocket Safety Code. A component comparison does not replace the kit instructions or assessment of the complete rocket.
For all published guides, browse the blog index. Our research method and scope explains how we use supplier specifications and published guidance without claiming in-house flight tests.
Historical tube-test records
For the surviving records from the earlier RocketMaterials site, see the historical axial tube crush tests. These archived results describe specific specimens and do not establish a strength rating for a current product.