In this article you will find the step by step instructions for how to fill out the sail measurement form. Here are some quick links to the different sections covered below:
The intersection of the ‘a’ and ‘b’ measurement.
The ‘a’ and ‘h7′ measurements will be taken with this line. Find the widest point from the ‘a’ line to the bolt rope but DO NOT include the bolt rope. The bolt rope is in the luff track of the mast therefore is not measured.
The h7 Measurement, find the widest point between the ‘a’ line and the edge of the bolt rope.
When setting up the ‘h1’ measurement make sure it is perpendicular to ‘a’.
This image illustrates where the ‘h1’ and ‘c’ intersection. Note that the ‘h1’ measurement does not follow the head of the sail.
This is the ‘c’ and the ‘h2’ measurement. The ‘h2’ is the widest point from the ‘c’ line to the leach of the sail which is typically at a batten.
This is an image of the ‘h4’ measurement. The ‘h2′,’h4′,’h5’ and ‘h6’ are all taken the same way. Find the widest point between the corresponding ‘c#’ line and the leach. This is typically at a batten. Also note that this is where you will put your stake for the next set of measurements. For example the point you take your ‘h2’ measurement will be where you put your stake for the intersection of ‘c3’ and ‘c4’ lines.
This is an image of the the ‘c4’ measurement. The point where the measurer is sitting in this picture is where the previous ‘h2’ measurement was taken.
This is an image of the ‘h’ and ‘a1’ measurements. Get the ‘h’ measurement by swinging the tape at the point where the measurement is the least is where it is square to ‘a’ and this is your number. The ‘a1’ measurement is where ‘h’ and ‘a’ intersect to where ‘b’ and ‘a’ intersect.
This is an image of the ‘b’ and ‘h8’ measurements. The ‘h8’ measurement will probably be 0.
Laying out the ‘a’,’c’,’h1′ and ‘b’ lines.
This is an example of the ‘h1’ line on the head of a jib.
This is the intersection of the ‘c’ and ‘b’ lines and the the ‘c’ measurement is being taken here.
This is the intersection of the ‘c’ and ‘b’ lines with the ‘b’ measurement being taken.
This is an image of the ‘h’ measurement. The ‘h’ line needs to be perpendicular to the ‘a’ line. You can find this by swinging the tape, the point of the shortest measurement is where ‘h’ and ‘a’ are perpendicular.
Image of the intersection of ‘h’ and ‘a’. Note the luff of the sail is zipped up and where the ‘a’ line is in reference to the jib luff.
This is the ‘h7’ measurement. Make sure you enter this measurement as a ‘-‘. If you don’t the jib will not measure in. I’m finding he jibs to be very tight. You’ll need to do the same thing with the ‘h11’ measurement.
Wrap a piece of paper or ribbon around the mast and mark where they intersect.
Measure from your mark to the end of the sheet.