2B, 3B, 4B and 5B narrow bladed low drag sailboat propellers
Conventional cruiser type propellers can cause tremendous drag on sailing boats. For this reason we manufacture a range of narrow bladed two, three, four and five blade yacht propellers. These units are available in left and right hand rotation with maximum blade width one quarter of the propeller diameter. This compromise design technique can give quite reasonable performance with auxiliary engines under power and also provide very low drag under sail.
Due to the reduced blade area of these propellers, a two blade should be selected which is about 8% larger in diameter than a normal area three blade or about 4% larger for the three blade yacht model.
Design Features and Advantages:
- Narrow blades reduce drag when sailing
- Lower maintenance than folding propellers
- Relatively inexpensive initial cost
- Individually pitchometer checked
- Statically balanced
- Cast in Nibral
| 2 BLADE, 3 BLADE, 4 BLADE AND 5 BLADE FIXED SAILBOAT DESIGN DATA | |||||||||
|---|---|---|---|---|---|---|---|---|---|
| Pitch Range | Approximate Standard Hub Sizes | Maximum bore sizes |
|||||||
| Diameter | Right & Left Hand | Large Diameter | Length | Standard Hub | |||||
| inch | mm | inch | mm | inch | mm | inch | mm | inch | mm |
| 10" | 254 | 6 to 10 | 152 to 254 | 1.50" | 38 | 2.12" | 54 | 1.00" | 25.4 |
| 11" | 279 | 6 to 12 | 152 to 305 | 1.50" | 38 | 2.25" | 57 | 1.00" | 25.4 |
| 12" | 305 | 6 to 13 | 152 to 330 | 1.50" | 38 | 2.25" | 57 | 1.00" | 25.4 |
| 13" | 330 | 8 to 14 | 203 to 356 | 1.62" | 41 | 2.50" | 64 | 1.125" | 28.6 |
| 14" | 356 | 8 to 14 | 203 to 356 | 1.62" | 41 | 2.50" | 64 | 1.125" | 28.6 |
| 15" | 381 | 9 to 14 | 229 to 356 | 2.00" | 51 | 3.12" | 79 | 1.25" | 31.8 |
| 16" | 406 | 9 to 14 | 229 to 356 | 2.00" | 51 | 3.12" | 79 | 1.25" | 31.8 |
| 17" | 432 | 10 to 15 | 254 to 381 | 2.12" | 54 | 3.12" | 79 | 1.375" | 34.9 |
| 18" | 457 | 10 to 15 | 254 to 381 | 2.12" | 54 | 3.12" | 79 | 1.375" | 34.9 |
| 19" | 483 | 12 to 16 | 305 to 406 | 2.50" | 64 | 4.00" | 102 | 1.50" | 38.1 |
| 20" | 508 | 12 to 16 | 305 to 406 | 2.50" | 64 | 4.00" | 102 | 1.50" | 38.1 |
| 22" | 559 | 14 to 20 | 356 to 508 | 3.00" | 76 | 4.50" | 114 | 1.75" | 44.4 |
| 24" | 610 | 15 to 22 | 381 to 559 | 3.00" | 76 | 4.50" | 114 | 1.75" | 44.4 |
| 26" | 660 | 16 to 24 | 406 to 610 | 3.37" | 86 | 5.25" | 133 | 2.00" | 50.8 |
| 28" | 711 | 18 to 26 | 457 to 660 | 3.75" | 95 | 6.00" | 152 | 2.25" | 57.1 |