5.3. Beam-Wise Location

There are several hull features that should be considered when determining the location of the Controllers in a beam-wise orientation. Generally, the Controllers should be mounted as far outboard as possible, up to the chines (if the hull has chines).

Engine Spacing

Because the Controllers have the potential to change water flow into the boat’s propellers, the Controllers should be mounted as far from the propellers as possible.

The distance discussed in this section is measured along the deadrise of the hull when viewing it from the stern, as illustrated in Figure 13.

Figure 14 – Distance Between Controller and Propeller

The Controllers can be mounted as close as 3 in. (76 mm) between the inboard edge of the Controller and the outboard diameter of the propeller tip. In the figure above, D represents the measurement between the Controller and the outboard diameter of the propeller tip, and Label 4 indicates the diameter of the propeller tip.

Chines

Based on the considerations of engine spacing and transom appendages, some installations will require the Controllers to extend outboard of the inboard edge of the chine, as shown below.

An overlap of the outboard chine of 1.5 in. (38 mm) is acceptable.

For overlaps greater than 1.5 in. (38 mm), performance may degrade rapidly. Please consult with Seakeeper for specific installations where chine overlap may be greater than 1.5 in. (38 mm).

Figure 16 – Chine Overlap

Hull Side Spacing

It is possible to have an installation where the Controller is mounted too far outboard causing water flowing around the hull side to interfere with the Controller and substantially reduce performance.

To avoid this issue, the Controller should be mounted at least 1.5 in. (38 mm) inboard of the hull side, as shown below.

Figure 16 – Hull Side Clearance