Making a Strake Template
To make a strake you first make a template. For a boat with broad strakes that is done by making a plywood template, which is smaller than the ultimate strake, but on which you write the correct dimensions using a pencil. The template is not therefore an exact copy of the strake. Proceed as follows:
- Take a strip of plywood that is slightly smaller on all sides than the final strake (Image 2).
- Screw the strip of plywood onto the frames; make sure that the plywood is fastened without any twists in it (Image 1) in order to prevent any measuring errors (Image 3).
- First of all draw the position of the frames onto the plywood template (Image 4). Place a cross in the centre to indicate that there is a solid piece of timber behind it at that point.
- Also mark on the template a notable part of the hull structure, such as the positions of a bollard frame (Image 8).
- Now draw, every 20 to 30 cm, a fixed distance (for example 10 cm) at 90 degrees from the strake below and the strake above (Image 6). It is important to place the folding rule at 90 degrees in order to prevent measuring and drawing errors (Image 7). It is also important to always use a fixed distance (Image 11), for example 10 cm (Image 9), again to prevent measuring and drawing errors (Image 10).
- If there is an angle or a curved line in the strake then you draw a number of pitch lines at these points on the template: draw 3 or more lines to the same point (Image 12). This allows you to determine the exact position of an interior angle, exterior angle or curved shape.
- Once all of the dimensions are drawn on the template (Image 13) the template can be unscrewed from the frames.
- The template is now ready for marking off on a suitable plank (Image 14).
Fasten on the strips of plywood
Take narrow strips of plywood
Overlap the strips of plywood
Mark off the positions of the frames
Mark off a fixed distance of 10 cm from the strake
Mark off a fixed distance of 10 cm from the top of the strake
Mark off a fixed distance of 10 cm from the bottom of the strake
Draw clear marks
Fixed distance is 10 cm
Pitch line marking
Marking all dimensions
The strake template is ready