Roll Wrapped Carbon Round Tube 25mm For Light Aircraft Strut, Source Factory, Legal Export

Detailed Description

A strut is a compression member with a bolted end, so the design questions are buckling over the unsupported length, local bearing at the lug, and what happens to the joint when the airframe swings from cold soak at altitude to a hot apron. A 2024-T3 tube answers those with section and weight; a wrapped carbon tube answers them with fibre direction. This one is 25mm OD by 21mm ID, wrapped from 3K plain-weave prepreg with mixed longitudinal and off-axis plies, cured under autoclave pressure on precision mandrels, and locally over-wrapped at the ends where the lug bonds. Against the aluminium tube of the same envelope you buy higher specific axial stiffness and roughly a third of the thermal expansion, so the strut length stays stable and the fitting sees less thermal pumping. The off-axis plies supply the hoop strength that stops a bonded lug splitting the tube, and the round section removes the corner stress risers a square tube carries into fatigue. You get a strut that carries its design load without a weight penalty, holds alignment through the season and ends in a bondable, inspectable joint.

The four things your stress review will ask. Layup is designed to the load case, with compression-dominated struts getting more 0° plus hoop restraint for buckling and combined-load members moving toward ±45. Porosity is held by wrap tension, debulk and autoclave cycle, with coupon verification available and the numeric target Confirm with supplier. Batch consistency is what makes a fleet repair possible, so prepreg lot, mandrel and cure record ship with the tubes. For analysis we accept your FEA output and return a ply-book proposal, and end machining runs on a fixture with internal plugs so bonded lug areas are dimensionally true. High and low temperature, UV and moisture ageing data Confirm with supplier, and the resin system is declared on the quotation. Guangdong Shenyang New Material｜ISO9001 & CE certified dry carbon composite manufacturer based in Huizhou, China. Equipped with autoclave, 4.0m×2.0m large-format CNC router and prepreg cold storage. Products for legal export, prototype & mass production available, batch performance traceable.

Specifications

Applications

Ultralight and light-sport aircraft wing struts and wire-brace support tubes; tail booms and fin support tubes; landing-gear fairing brackets; composite fuselage frame longitudinal struts; large UAV under-wing hardpoint support tubes.

Why Choose Us

You are not buying a tube, you are buying a documented load path. Send the loads and constraints and you get back a ply schedule, a mandrel choice and an end-detail proposal rather than a price alone. Lot records mean a replacement strut two years later can be built from the same material family instead of the nearest available one. Aircraft and drone parts are exported against a true declared description under applicable dual-use rules. Guangdong Shenyang New Material｜ISO9001 & CE certified dry carbon composite manufacturer based in Huizhou, China. Equipped with autoclave, 4.0m×2.0m large-format CNC router and prepreg cold storage. Products for legal export, prototype & mass production available, batch performance traceable.

FAQ

Q1.How do you control buckling in a compression strut?

A1.Three levers: 0° fibre ratio, wall thickness and end restraint. I need your unsupported length and design axial load before I will commit to a wall.

Q2.Will the CTE difference from an aluminium fitting loosen the joint?

A2.The tube's axial expansion is far lower than the fitting's, so the joint must be designed for it. Bond length, sleeve geometry and adhesive choice carry that difference.

Q3.Can it replace a 25mm aluminium strut directly?

A3.Not at equal wall. It is redesigned to equal stiffness against your load spectrum, and the lug detail changes with it. Equal-thickness substitution is not valid.

Q4.Will a bonded lug split the tube?

A4.Local circumferential over-wrap plus adequate bond length is the standard fix. Dimensions come from the load case, not from a table.

Q5.Can you support FEA work?

A5.Yes. Send model output or load cases and we return a layup proposal. Joint-level analysis depth Confirm with supplier.

Q6.Does the tube need UV protection in service?

A6.Long-term outdoor exposure warrants a coating. Coating system and weathering data Confirm with supplier, and bare tube is not recommended for permanent external use.

Q7.MOQ and lead time?

A7.Prototypes are available per piece. Production MOQ and lead time Confirm with supplier, driven by mandrel set and autoclave scheduling.

Q8.What reports can you provide?

A8.ISO9001 and CE are factory certifications. Material and mechanical test data are supplied where actually tested; untested items stay Confirm with supplier.

Q9.What do you need to quote a strut?

A9.Unsupported length, axial load plus any side load, end fitting type, safety factor and quantity. Installation angle helps where buckling governs.

Q10.What export documents are needed?

A10.End-use statement, material list and a true customs description. Aircraft and drone parts are declared as what they are under current dual-use rules.

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