Category sourcing
Sourcing drone propellers from Taiwan
The propeller is the cheapest part of the propulsion system and the one that decides what the other parts have to be. Get it wrong and you do not get a slightly worse aircraft — you get a motor running hot, an ESC sized for a load it should never have seen, and a flight time that misses the spec by a quarter.
Tell us what you are looking for and we will identify Taiwan-based manufacturers whose capabilities match and introduce you directly, usually within two business days. There is no charge to submit a request.
A propeller is not specified on its own
Almost every other component on an aircraft can be shortlisted from its own datasheet. A propeller cannot. Diameter and pitch only mean something against a motor KV, a cell count, and an all-up weight — the same 22-inch blade is the right answer on one airframe and an overload on another. This is why propeller inquiries stall: the buyer sends a size, the manufacturer asks what it is turning, and two weeks disappear.
The second difficulty is that the market splits by manufacturing process, not by size, and the two halves rarely come from the same factory. Injection-molded blades — glass-filled nylon and similar — are consistent, cheap per unit, and forgiving of a strike, but the tooling is a real up-front cost and the part is heavier. Carbon composite blades are stiffer and lighter, which shows up directly as efficiency at larger diameters, but they are labor-intensive, more variable between units, and less tolerant of damage. Below roughly 15 inches most volume buyers end up injection-molded. Above about 20 inches, carbon usually wins on efficiency. In between is a genuine trade, and it is worth stating which way you lean rather than letting the manufacturer assume.
Third is balance and repeatability, which is where cheap suppliers are separated from serious ones. An unbalanced pair puts vibration into the airframe, and vibration is what corrupts IMU data, loosens fasteners, and blurs a survey image. Ask what the balance tolerance is, whether blades are matched into sets, and whether that is measured on every unit or on a sample.
Taiwan is a credible place to look for this part for a reason that has nothing to do with drones: it has one of the world's deepest carbon composite manufacturing bases, built over decades supplying bicycle frames, golf shafts, tennis rackets, and other sporting goods. Layup, resin systems, mold making, and cosmetic finish quality are long-solved problems there. A UAV propeller is a smaller and more demanding version of work that industry already does at volume, and the same is true of the precision injection molding base on the plastics side.
What to specify when you send us a request
- Diameter and pitch — in inches or millimeters, and say which. If you have not fixed them yet, skip to the aircraft figures below and let the manufacturer propose.
- The motor it turns — KV, cell count, and maximum continuous current, or the motor part number. This is the single most useful line in the request.
- All-up weight and rotor count — with target hover thrust per rotor, or the thrust-to-weight ratio you are designing to. This is what lets a manufacturer sanity-check a size you have already chosen.
- Blade count — two-blade for efficiency, three or more where diameter is capped by the airframe or where you need lower tip speed for noise.
- Material and process — carbon composite, injection-molded nylon or glass-filled polymer, or open to a recommendation. Say whether tooling cost or unit cost is the constraint.
- Folding or fixed — and if folding, the hub interface and whether the blades need to self-deploy under spin-up. Folding hubs are a mechanical part with their own failure modes and their own supplier list.
- Hub and mounting — shaft diameter, bolt circle, or the quick-release standard you are matching. A propeller that cannot bolt to the motor you already bought is the most common wasted sample round.
- Rotation — CW/CCW pairing and how many of each per shipset.
- Noise or acoustic constraints — if you have a limit to meet, state it now. It changes tip speed, blade count, and planform, and it is not something to retrofit.
- Balance tolerance and testing — whether you need matched sets, a stated balance spec, or per-unit test data.
- Volume and timeline — sample and production quantities, and when you need them. Volume is what decides whether tooling amortizes.
Where propellers sit on compliance
The equipment NDAA §848 names centers on the parts that carry data or control the aircraft — flight controllers, radios and data-transmission devices, cameras and gimbals, ground control systems, and operating software. A propeller is not one of those, and it is rarely the component a compliance review starts with.
It does not follow that a propeller is outside the question. Acquisition guidance in practice examines origin across the whole platform, propulsion included, and a covered-entity part anywhere in the aircraft is what disqualifies it — so treat "not specifically named" as a statement about where scrutiny usually begins, not as an exemption. The binding requirements normally arrive at the program level: through the Drone Dominance Program (DDP), through bill-of-materials rules a prime imposes on its suppliers, or through a customer's own origin standard.
The input worth asking about specifically is the carbon fiber itself. Prepreg and tow are globally traded, and a manufacturer in Taiwan may well be laying up material that originated elsewhere. If your BOM rules reach the raw material and not only the point of manufacture, say so in the request — it is a question worth settling before a sample round rather than after.
What happens after you submit
We review every sourcing request — typically within two business days — and screen it against the U.S., EU, UN, UK, Japanese, and Australian restricted-party lists we subscribe to before we contact anyone. Requests that clear are matched to manufacturers whose capabilities fit, and we make a direct introduction — from that point the conversation is between you and the manufacturer. We are not a broker, we hold no inventory, and we do not handle payment or logistics. An introduction is a qualified starting point for your own diligence, not a compliance determination.
Other categories we source
Propulsion & power
Electronics & control
Frequently asked questions
Carbon or injection-molded — which should I be asking for?
Mostly a question of diameter and volume. Under about 15 inches, injection molding usually wins: consistent, cheap per unit once tooling is paid for, and more tolerant of a strike. Over about 20 inches, carbon's stiffness-to-weight advantage shows up directly as efficiency and flight time, which is why large multirotors are almost all carbon. In between, it depends on whether your constraint is unit cost or endurance. Tell us the diameter, the volume, and which of those two matters more, and you do not need to have decided.
I know my motor and airframe but not the propeller size. Can you still help?
Yes, and that is the better starting point. Motor KV, cell count, all-up weight, and rotor count are enough for a manufacturer to propose a diameter and pitch and back it with thrust data. Arriving with a size already chosen but no motor context is the version that wastes time, because the first thing you will be asked is what it is turning.
Do I need to pay for tooling?
For a custom injection-molded blade, yes — tooling is a real up-front cost and it only amortizes at volume, so it is worth stating your annual quantity early. Carbon layup carries much lower tooling cost, which is part of why low-volume and prototype programs often start there even at diameters where molding would eventually be cheaper. Many manufacturers also hold existing molds, so if you can work to an existing size you may avoid the cost entirely. Ask.
Do you charge buyers to submit a sourcing request?
No. Submitting a request and receiving an introduction is free for buyers.
What information is screened?
Every inquiry is checked against the U.S., EU, UN, UK, Japanese, and Australian sanctions and restricted-party lists we subscribe to, along with jurisdiction checks, before we contact any manufacturer.
Do you handle the transaction?
No. We make a direct introduction and step out. Your procurement relationship is directly with the manufacturer.