HQProp is a Chinese propeller manufacturer, and its propellers are made in China. For US programs subject to NDAA covered-country flow-down requirements — which reach individual components, propellers included — that typically rules foreign-made parts like these out. Whether a specific part is permitted on a specific program depends on your contract's flow-downs, so confirm with your compliance team.
Why country of origin is the deciding factor
NDAA covered-country and flow-down requirements ban federal agencies from purchasing or operating UAS — and their components — from covered foreign entities, extend to federal grants, contracts, and cooperative agreements, and flow down from primes to their suppliers. Compliance is required at the component level. The NDAA covered-country explainer walks through how the requirements work; the verification checklist covers what a compliant replacement has to prove.
Domestic replacements for HQProp-class tri-blades
Anvil's 5×4.3×3 tri-blade (ANV-P5043) is engineered as a drop-in for the HQProp 5X4.3X3 V1S — matched on size, pitch, and rotation, made in Nevada, USA.
The rest of the line is referenced to Gemfan part numbers in the same Gemfan/HQProp equivalence class — if you fly an HQProp tri-blade in one of these sizes, send us the part number and we'll confirm fitment:
| Referenced Part | Size | Domestic Drop-In |
|---|---|---|
| Gemfan Hurricane 51466 (Gemfan Hurricane-class) | 5.1×3.6×3 | ANV-P5136 |
| Gemfan Flash 7040 (Gemfan / HQProp-equivalent) | 7×4×3 | ANV-P7040 |
| Gemfan 8040-3 (Gemfan / HQProp-equivalent) | 8×4×3 | ANV-P8040 |
| Gemfan 1050 Cinelifter (Gemfan / HQProp-equivalent) | 10×5×3 | ANV-P1050 |
| Gemfan D90-3 / D90S-3 3.5″ (Gemfan ducted-class) | 3.5×3×3 | ANV-D3530 |
| Gemfan Fury 5131.0 (Gemfan Fury-class) | 5.1×3.1×3 | ANV-P5131 |
| Gemfan Hurricane 6045-3 (Gemfan Hurricane-class) | 6×4.5×3 | ANV-P6045 |
| Gemfan Flash 7042 (Gemfan Flash-class) | 7×4.2×2 | ANV-P7042 |
| Gemfan 1051F-2 (Gemfan folding-class) | 10×5.1×2 | ANV-F1051-2 |
| Gemfan 1051F-3 (Gemfan folding-class) | 10×5.1×3 | ANV-F1051-3 |
If HQProp parts are on your BOM
- Inventory the sizes and part numbers you currently fly.
- Vet any replacement at the sub-tier level — resin and reinforcement provenance included, per the checklist.
- Send us the part numbers for a fitment read and availability.