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Posted by: Tom Daniels 6/2/2008 6:52 PM
The construction of Cherokee begins with drawing the shape of the boat out full sized, a process known as lofting. We've spent the past few days getting the lofting floors built. We'll be using 2 floors, one for the long lines and one for the body plan. If these terms sound like gibberish to you, here's a good site that that explains the various lines that you'll be hearing about in the coming week. The long lines (the plan view, profile, waterlines and buttocks) are lofted on the long lofting floor.

Long lines lofting floor

We'll loft the body plan on a separate, smaller lofting floor.

body plan lofting floor

This floor is raised 18" to make it easier to work on (not as much kneeling for our old knees!). We'll take the information from this floor to make the molds that will help shape the boat.
Here's a body plan lofting for a Whitehall pulling boat that the 2nd year class made at IYRS last fall.

body plan lofting

In this style of lofting, we use thin sticks called battens, to work out the various lines. This view of a boat is the same type of view you'd get of a loaf of bread if you traced the outline of each slice going along the length. The left side of the lofting shows the slices from the aft end (nearest the center) going forward to about amidships. The right side of the lofting shows the slices from the bow (also nearest the center) going aft to amidships.  
Here's the actual boat that these lines came from:

Whitehall transom

In the coming weeks we'll draw the boat full size on the lofting floor, and those drawings will give us enough information to do everything from making molds to determine precise bevel angles of particular parts and knowing where to drill bolt holes.  
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