Jib Boom Experiment

The problem I encountered was that I could not lower the Jib with it attached to the Jib Boom.  The illustration at left explains the problem.

We mark a point, A, on the Jib such that a line drawn from Point A to the Clue will be perpendicular to the Forestay.  We will next mark the Clue as Point B.

As we lower the Jib point A progresses down the Forestay but as you can see point B, which is attached to the end of the Jib Boom, cannot move.

Each Red Line, AB is the same length. The progression of the red line illustrates the fundimental problem with my proto-type.

As the Jib is lowered the distance from A to B is fixed and so with the Jib Boom attached to B you can see the Jib will get stuck from the top red line down or tear loose from the Boom.  (Continued Below)

 I began working on this problem during October of 2009 and was frustrated by the coming end of the boating season because the Christopher-Jin had to be put up for the winter.

I did come up with a possible solution that just might make my inexpensive Jib Boom a possibility.

If a line (shown in Blue) is tagged onto the Jib Halyard and run as shown in the illustration to the left, then as the Jib is lowered the blue line will pay out making up for the shortfall of the Red Line AB.  Notice the dotted blue lines.

 (Continued Below)

The third illustration (Below) shows the basic Jib Boom Proto-Type.