Detailed Description
Multi-rotor UAV arms built from 7075 aluminum tubing commonly suffer permanent bending on hard landings-even at sub-5mph impact speeds. Once bent, arm geometry shifts thrust vector by 2–4°, forcing constant PID compensation that drains battery 18% faster per flight. Salt spray environments compound the issue with crevice corrosion at arm-to-hub joints.
Our solution: prepreg carbon fiber boards cut into arm profiles via 4.0m×2.0m CNC router. T700 UD layup oriented at ±10° off arm axis delivers tensile strength 2,150MPa with 44% mass reduction vs 7075-T6. Unlike aluminum, carbon exhibits elastic recovery under impact-returning to original geometry after loads below ultimate. Interlaminar shear at CNC edges is preserved via climb-cut strategy with 6-flute diamond tooling, maintaining >38MPa at cut boundaries.
Every production lot is cold-chain tracked from prepreg storage (-18°C) through layup to autoclave cure. Batch traceability records include fiber lot number, cure cycle parameters, and final dimensional inspection. Legal export handling covers all required documentation for carbon fiber composites to destination markets.
Specification
|
Parameter |
Value |
|---|---|
|
Fiber |
T700 UD / 3K hybrid |
|
Process |
Prepreg autoclave |
|
CNC format |
Up to 4000×2000mm |
|
Thickness |
2mm – 20mm |
|
Tensile strength |
≥2,150MPa |
|
Weight vs aluminum |
-44% |
|
Edge shear strength |
>38MPa |
|
Flatness |
±0.05mm / 300mm |
|
Export |
Legal export certified |
Custom FAQ
Q: Can arm profiles be supplied pre-drilled for M3/M4 fasteners?
A: Yes, CMM-verified hole patterns with ±0.03mm position tolerance available.
Q: How does carbon compare to aluminum for vibration damping at motor mount?
A: Carbon's damping ratio (0.015–0.02) is 2–3× aluminum, reducing high-frequency motor vibration transmission to airframe by 40–60%.
Q: Is export to Japan and South Korea supported?
A: Yes, full legal export process including destination customs classification support.
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