Not all "aluminum" or "carbon" RC upgrade parts are created equal. Many generic aftermarket brands cast or extrude soft 6063 architectural aluminum or use fiberglass-core laminate disguised with a thin carbon surface layer. At Rakonheli, every component is engineered from certified raw stock—selecting between 7075-T6 aerospace aluminum, 6061-T6 billet aluminum, Grade 5 (Ti-6Al-4V) titanium, 3K aerospace carbon fiber, and virgin POM Delrin based on the exact mechanical load of the part.
Material Properties Comparison Table
Below is the engineering reference data used by Rakonheli's CAD/CAM team when designing rotor heads, suspension arms, chassis plates, and turnbuckles:
| Material Grade | Density (g/cm³) | Yield Strength (MPa) | Ultimate Tensile Strength | Primary Rakonheli Applications |
|---|---|---|---|---|
| 7075-T6 Billet Aluminum | 2.81 g/cm³ | 503 MPa | 572 MPa | High-stress shock towers, Promoto triple clamps, rotor hubs, steering knuckles, pinions |
| 6061-T6 Billet Aluminum | 2.70 g/cm³ | 276 MPa | 310 MPa | Heat-sinking motor mounts, servo mounts, micro frame cages, battery trays |
| Grade 5 Titanium (Ti-6Al-4V) | 4.43 g/cm³ | 880 MPa | 950 MPa | Main shafts, feathering spindles, turnbuckles, high-impact hinge pins & hardware |
| Pure 3K Woven Carbon Fiber | 1.60 g/cm³ | 600+ MPa (In-Plane) | 750+ MPa | Main chassis side frames, multirotor arms, vertical tail fins, shock tower plates |
| Virgin POM Acetal (Delrin) | 1.41 g/cm³ | 68 MPa (High Elasticity) | 70 MPa | Low-friction main gears, anti-vibration landing skids, suspension pivot bushings |
When to Choose 7075-T6 vs. 6061-T6 Aluminum
- Choose 7075-T6 wherever threads are tiny (M1.2 to M2), wall sections are thin, or impact loads are extreme—such as collective pitch swashplates, blade grips, 1/4-scale motorcycle clamps, and exposed suspension knuckles.
- Choose 6061-T6 for complex 3D-pocketed cages, electronics trays, and motor heat sinks where thermal conductivity (
167 W/m·K) and intricate CNC Weight-Relief pocketing provide the ideal balance of stiffness and ultralight mass.
Explore by Platform: Experience true aerospace metallurgy across our RC Car & Truck, RC Helicopter, and Multirotor & FPV catalogs.
