2 and 3 Blade Fixed Inboard
Sailboat Propellers
Conventional cruiser type propellers can cause tremendous
drag on sailing boats. For this reason we manufacture a range
of narrow bladed two and three 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 |
* Individually pitchometer checked |
| * Lower maintenance than folding propellers |
* Statically balanced |
| * Relatively inexpensive initial cost |
* Cast in Nibral |
|
2
BLADE AND 3 BLADE FIXED SAILBOAT DESIGN DATA |
|
Diameter |
Pitch
Range
Right & Left Hand
inch
mm |
Approximate
Standard Hub Sizes |
Maximum
bore sizes
Standard Hub
inch
mm |
inch
mm |
Large
Diameter
inch
mm |
Length
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 |
|
** Note: 20 to 28" diameter are 2
bladed propellers, with skewed blade shape |
