FPV drones · 7 to 7.5-inch long range
long-range FPV drone propeller 7.5 in, 2 blades (20° skew)
Model designed and computed with the Heliciel software. Design point: 10,340 rpm in hover, 50 % throttle on a T-Motor 2807 1,250 KV motor on 6S with a C7.5x4.6x3 propeller. 20° skew.
The pack contains the complete propeller as a full-definition STL, STEP surfaces (complete propeller and one blade), the Heliciel .hlc project and the computation records. It also contains the same propeller turning the other way (STL and STEP).
Characteristics computed by Heliciel
| Diameter | 191 mm |
|---|---|
| Number of blades | 2 |
| Hub diameter | 20 mm |
| Pitch at 0.7 R | 87 mm (3.4 in) |
| Design speed | 10340 rpm |
| Fluid speed at design point | 0 m/s |
| Thrust | 5.01 N |
| Torque | 0.051 N·m |
| Shaft power | 55 W |
| Blade shape | skew 20° |
| Angles of attack | smoothed (4° along the whole blade) |
| Blade root | junction shank 5.0 × 26.9 mm |
| Bore | 5 mm |
| Hub length | 8 mm |
| Blade thickness | 2.4 mm at the root, 2.6 mm at mid-radius (r = 44.2 mm), 0.6 mm at the tip |
| Material used in the computation | 3D-printing PETG |
| Strength at design point | yes |
| Direction of rotation | right-hand |
| Files included | STL, STEP, HLC |
| Reference | B-191-2p-S |
Need a propeller for your own parameters?
This model was designed and computed with the Heliciel software. For a custom propeller there are two ways: the Heliciel software (Windows: computation, 3D view, STL and STEP exports), and the Heliciel MCP connector, which lets your AI assistant — ChatGPT, Claude, Le Chat and any MCP client — compute a real propeller, with a free 1-day discovery pass.
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