Sub-system
A composite fuselage is not fabricated and bolted together; it is laid down as tape by a robot, cured under pressure and heat, and comes out as a single barrel. That changes the weight, the fatigue life, the factory and the entire inspection problem.
In one sentence
A composite airframe is a primary structure built from carbon fibres embedded in a cured polymer matrix, laid down by automated machines and cured as large one-piece sections rather than assembled from sheet metal.
The material is anisotropic: extremely strong along the fibre direction and much weaker across it. Designing with it means choosing the orientation of every ply, so a laminate is engineered layer by layer for the loads that part will see. That is more design freedom than metal offers, and far less tolerance for a designer who treats it like metal.
Manufacturing is automated fibre placement — a robot head laying narrow tows of pre-impregnated tape onto a rotating mandrel — followed by curing in an autoclave at pressure and temperature. Out-of-autoclave processes exist and are cheaper, and qualifying them for primary structure has been slow because the evidence bar for anything holding passengers is set by decades of service data that new processes do not have.
Every kilogram removed from the structure is a kilogram of fuel or payload for the aircraft's whole life, compounding across tens of thousands of flights. That is why an airframe programme will spend enormous engineering effort for a few percent of empty weight, and why composite adoption happened despite its higher material and inspection cost.
An impact that leaves a barely visible dent on a metal skin can cause internal delamination in a laminate — layers separated inside, with the surface almost unmarked. Structures are therefore designed to tolerate damage up to a defined size, and inspection uses ultrasound and thermography rather than a visual walk-around. This is the single largest operational difference from metal.
A metal skin can be patched with a doubler and rivets almost anywhere. A composite repair means removing damaged plies, scarfing the area to a shallow taper, laying replacement plies in the right orientations and curing them under controlled heat and vacuum. It requires trained technicians and equipment, which is why composite repair capability is a real factor in where an aircraft can be fixed.
2 of these are marked as a chokepoint: a handful of qualified suppliers, a multi-year lead time, or a single geography.
Qualified intermediate-modulus fibre and resin systems come from very few suppliers, and material qualification is programme-specific.
Composite materialsA barrel is laid by a multi-axis head placing tape to a fraction of a millimetre; without that motion control and its drives there is no way to build the laminate the design assumes.
Motion controlAluminium corrodes against carbon fibre, so every joint into composite structure is titanium, drawn from the same constrained forging base.
Titanium and forgingsCuring a one-piece barrel needs an autoclave big enough to hold it and tooling that holds shape at temperature. Both are long-lead capital that fixes how many sections a site can produce.
Composite primary structure is certified on evidence that it carries limit load with damage up to a defined size present, which is what dictates the ply layup and the inspection intervals.
Type certificationOther pages in this map that name Composite airframes as something they cannot do without.
What each company supplies at this step, and — where a public figure exists — its share of this specific market — with what that share measures, the period it covers and who published it. Some rows also show the company’s own reported revenue for the segment covering this step, which is a different thing: it says how much this business matters to that company, not how much of the market it holds. Not a ranking and not a recommendation.
Designs and assembles composite-primary-structure aircraft and builds major sections in-house.
Designs and assembles composite widebody airframes across its programmes.
Supplies aerospace carbon fibre, prepreg and honeycomb core.
Supplies the aerospace carbon fibre much composite primary structure is built from.
Builds the composite wing boxes for the largest twin-aisle programmes, a workshare no other supplier holds.
Builds composite fuselage sections on the same programmes, from the Japanese industrial partnership behind them.
Builds the centre wing box, one of the few structures where a single supplier is qualified.
Builds composite fuselage barrels and horizontal stabilisers as a risk-sharing partner rather than a job-shop supplier.
Whether out-of-autoclave curing is qualified for primary structure at scale and changes unit cost.
Whether carbon fibre supply keeps pace as both aerospace and wind demand grow from the same producers.
Whether composite repair capability spreads far enough to stop constraining where aircraft can be serviced.
Each page explains one technology in plain language, states what it depends on, and names companies by what they supply at that step. Company roles are described qualitatively and deliberately carry no market shares, revenue figures or rankings — those change faster than an explainer can, and a stale number is worse than none. Ticker links point at company pages on this site and are provided for reference only.
Nothing here is investment advice, a recommendation, or a forecast. A company named on a page about a technology is not thereby a good investment, and the chokepoints described are structural facts about supply chains rather than predictions about prices. Technology moves; where a page describes something as unresolved or in development, that was true when it was written.