FPV drones · 3-inch cinewhoop
cinewhoop drone propeller 3 in, 5 blades (ducted)
Model designed and computed with the Heliciel software. Design point: 19,767 rpm in hover, 50 % throttle on a 1404 3800 KV motor on 4S. Computed inside a duct (blade thrust only); pack with the blade alone and a welded-duct version, geometry only.
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). A version with the duct welded to the blade tips, to print as a single part, is included: geometry only, its performance is not computed (the computation assumes a fixed duct).
Characteristics computed by Heliciel
| Diameter | 76 mm |
|---|---|
| Number of blades | 5 |
| Hub diameter | 8 mm |
| Pitch at 0.7 R | 50 mm (2.0 in) |
| Design speed | 19767 rpm |
| Fluid speed at design point | 0 m/s |
| Thrust | 1.02 N |
| Torque | 0.007 N·m |
| Shaft power | 14 W |
| Blade shape | computed inside a duct |
| Angles of attack | smoothed (5° along the whole blade) |
| Blade root | junction shank 6.0 × 3.2 mm |
| Bore | 5 mm |
| Hub length | 8 mm |
| Blade thickness | 1.0 mm at the root, 1.0 mm at mid-radius (r = 17.6 mm), 0.2 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-076-5p-D |
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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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