Boat propeller 90 mm, 7 scimitar blades (35° skew)
Model designed and computed with the Heliciel software. Design point: 2,000 rpm at 5 knots, shaft 6 cm below the surface. Seven blades with high skew (35°): the shape of quiet propellers.
The pack contains the complete propeller as a full-definition STL with root fillet, STEP surfaces (complete propeller and one blade), the Heliciel .hlc project and the computation records.
Characteristics computed by Heliciel
| Diameter | 90 mm |
|---|---|
| Number of blades | 7 |
| Hub diameter | 18 mm |
| Pitch at 0.7 R | 150 mm (5.9 in) |
| Design speed | 2000 rpm |
| Fluid speed at design point | 2.57 m/s |
| Thrust | 47.28 N |
| Torque | 1.071 N·m |
| Shaft power | 224 W |
| Propulsive efficiency | 0.54 |
| Blade shape | skew 35° |
| Angles of attack | smoothed (4° along the whole blade) |
| Bore | 5 mm |
| Hub length | 31 mm |
| Blade thickness | 1.9 mm at the root, 1.9 mm at mid-radius (r = 22.5 mm), 1.2 mm at the tip |
| Material used in the computation | PA6, 30 % glass fibre |
| Strength at design point | yes |
| Direction of rotation | right-hand |
| Files included | STL, STEP, HLC |
| Reference | E-090-7p-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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