These dual purpose systems offer sailors the option of either speed or power. They are used for mainsheets on small to medium-sized offshore boats where power is required for effective heavy-air trimming upwind, but speed is crucial for off-wind trimming and mark roundings.
Typical
boat length:
Small Boat: 22' - 28' (6.7 - 8.5 m)
Midrange: 29' - 34'
(8.8 - 10.4 m)
Big Boat: 35' - 42' (10.7 - 12.8 m)
2:1/4:1 Swivel Base
This system is often found on boats like J/24s where a center-mounted swivel base is desired.
Diagram
Ref. |
Description |
Small Boat
Part No. |
Midrange
Part No. |
Big Boat
Part No. |
| A |
Double |
2602 |
|
|
| B |
Single |
2600 |
|
|
| C |
Double |
397
2634 |
|
|
| D |
Cam base |
402 |
|
|
|
3:1/6:1
This 3:1/6:1 two-speed system is used on boats end-boom sheeting and mainsails up to 240 ft2 (22.3 m2) and end-boom sheeting.
Diagram
Ref. |
Description |
Small Boat
Part No. |
Midrange
Part No. |
Big Boat
Part No. |
| A |
Cross Block |
400
|
400 |
|
| B |
Fiddle |
401 |
401 |
|
|
3:1/6:1 Swivel Base
This 3:1/6:1 system allows the mainsheet trimmer to be positioned anywhere on the boat. A great setup for sportboats.
|
4:1/8:1 Swivel Base
Similar to the 3:1/6:1 swivel base system, but uses a 4:1/8:1 tackle for more power.
|
6:1/24:1 Cascaded
This 6:1/24:1 system is used on boats with mains as large as 275 ft2 (25.5 m2) and end-boom sheeting.
|
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