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From a single tow.

Strength begins
with the fiber.

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01 / Carbon tow

Choosing the Right Carbon Fiber Tube for Your Drone

The right drone tube balances weight, rigidity, mounting requirements, and vibration behavior. Reaction Composites filament wound carbon fiber tubes are designed primarily for stiffness along their length, making them candidates for drone arms, wing spars, tail booms, landing structures, and payload supports.

Begin with the geometry of the aircraft: arm or spar length, motor and propeller arrangement, payload, mounting dimensions, and any required internal wiring clearance. Then evaluate the loads and the amount of deflection the aircraft can tolerate.

Consider diameter and wall thickness together. Increasing tube diameter can improve bending stiffness efficiently, while increasing wall thickness adds material to carry loads and support connections. A thicker wall also adds weight, so the best choice depends on the complete assembly. Clamps and motor mounts must distribute their loads without locally crushing the tube.

Evaluate resonance in the assembled aircraft. Natural frequencies depend on stiffness, mass, unsupported length, and connection conditions. Motors, propellers, mounts, and payloads all influence that response. Changing the tube can shift a natural frequency, but greater stiffness alone does not guarantee freedom from vibration. Evaluate structural modes against motor rotational frequencies, blade-passing frequencies, and relevant harmonics throughout the operating range.

UAV arm dynamics

Design around the vibration.

A UAV arm bending mode and a qualitative resonance response A tube clamped to an airframe carries a motor at its free end. Dashed orange shapes show exaggerated up and down bending. A response curve peaks when excitation frequency approaches a structural natural frequency. 01 / An arm is a spring 02 / Excitation can amplify motion Airframe mount Motor + propeller Unsupported span Exaggerated bending motion Excitation frequency → Relative vibration fₙ Resonance region Separate structural modes from operating excitation. Conceptual illustration. No frequency scale or measured response is implied.

Why it matters. Amplified arm motion can disturb motor alignment and camera stability. Vibration reaching the flight controller can degrade the position estimate.

What to change. Tune diameter, wall, unsupported span, mounts, and motor mass together. Check the assembled aircraft across its operating RPM range, including blade-passing harmonics.

The natural frequency belongs to the complete assembly, not the tube alone. Validate with vibration measurements and flight logs. ArduPilot vibration guidance

Our stock laminate combines axial reinforcement with an outer ±45° layer for off-axis support and wall stability. Where the aircraft needs a different balance of bending stiffness, torsion, weight, or dimensions, we can discuss a custom winding configuration.

Compare stock carbon fiber tube sizes

Share your aircraft dimensions and loading requirements with Reaction Composites.

Manufactured by Reaction Composites