Building The Body

This is a must so that your dummy can withstand the tremendous amount of power and impact that it will recieve.

The first step to building the body of the Jong is to cut the log to the desired length. The neater the cut, the less one will need to sand at the end of the project. Be sure to also choose the face or front of the body, taking into account the amount and size of checks running through it.

The next step is to mark a vertical midline down the front of the body, then a line on the top end of the dummy that extends from the first line, through the core line of the body, all the way to the back.

Using these lines as the main guides, draw where the holes for the three arms and the leg will be, as shown on the plans.

A very suitable angle is achieved if when marking off the top two arm holes, one allows there to be a 3/16" gap between the inside of the hole, and the vertical midline of the dummy, or a 3/8" gap between the holes. This is a suggestion that will greatly improve the usefulness of the dummy.

Note from the plans at the back of this book that the two top armholes must cross the transverse plane seen on the top of the dummy. It is crucial to not make these two holes parallel to each other. Follow the next steps carefully in order to avoid such a mistake.

Lay the body horizontally. sure that the body is level.

It is important whenever drilling a hole, to be

Center the topmost armhole when seen from above. Do NOT place the dummy with the vertical midline in the center when seen from above, offsetting one armhole to each side of the center of the body, as shown in this photo.

Using a long 1-1/2" boring bit, drill a pilot hole, which will be the center of the armhole, for the first and topmost arm all the way through the dummy. Such a bit will produce a nice, clean, and straight hole; and it will save you much chiseling, but if a bit that size is unavailable, you may use one of a smaller diameter.

Next, Begin to carefully chisel the square shape of the hole and continue chiseling down all the way through the body.

Great care must be taken while chiseling, in order to keep the hole from wandering off from where it should be.

If very long chisels are unavailable, you'll have to draw the shape of the hole on the back of the dummy. Use the pilot hole that you drilled, to determine the exact position of the hole, and once you've cut in as far as your chisel will take you, start the same process from the back of the dummy. Your two holes, pertaining to the same arm, should meet in the middle.

Once you've completed the first and topmost armhole, rotate the dummy, centering the hole for the second arm. Follow the procedure as you did for the top armhole.

Be aware that since there is no distance between the bottom of the first armhole, and the top of the second, the two holes will literally meet in the middle of the dummy, creating a diamond shaped passage from one hole to the other.

Repeat the process for the last armhole in the same way as the two previous steps.

The hole for the leg on the Mook Yan Jong, must be slanted at a 14° slope. To achieve this, your pilot hole must be made using a wooden guide. One can easily be made by drilling a hole with the boring bit into the end of a 3"x 2"x 2" block of wood.

Then, using a miter saw, cut off both ends of the block at the prescribed 14° angle.

Then, using a miter saw, cut off both ends of the block at the prescribed 14° angle.

Now place the guide on the log as shown and commence drilling your pilot hole. Once you've drilled a couple of inches into the body of the Jong, you may set aside the guide. At this point, the first couple of inches on your hole will serve as a guide as you drill the rest of the leg hole. If your boring bit is of a small diameter, you may wish to drill a couple of pilot holes.

Wooden Dummy Construction

With a pilot hole drilled, chiseling out the rest of the hole is much like chiseling the armholes, except one must be careful to create this hole with the 14° angle. The wooden guide you created is useful in this process. Use the guide by laying it on the surface of the body, at the top of the leg hole and begin chiseling out the hole.

Then move the guide to the bottom of the hole and use the back edge of the guide, begin chiseling out the bottom of the leg hole. This process will help you start the leg hole at the correct angle.

With the holes for the limbs in place, one is ready to make the holes for the crosspieces that will hold up the Mook Yan Jong.

Mook Yan Jong Plans

First draw a line perpendicular to the line you've drawn on the top of the body. Then extend this line down the side of the body.

Wooden Dummy Plan

Mark the holes as shown on the plans at the back of this book. Be sure that the holes are off centered and toward the back of the dummy. You cannot, however, use a 1-1/2" boring bit. You'll have to go with a smaller one. Drill a pilot hole and chisel out the corners as you did with all the previous holes.

A common concern for people who own a Mook Yan Jong, is finding a way to anchor it, so that it does not slide from side to side on the crossbeams. Some use blocks of wood on either side of the body to keep it in place. A simple and more cosmetically pleasing way is to insert a couple of dowels on the back of the body, that will fit into notches cut out of the crossbeams. On the plans for the back view of the body, you will see two holes; one is found slightly over 7" down from the top, and the other one a little over 43". Use a 5/8' boring bit, and drill only halfway through the dummy. As you drill in, if you look into the side hole for the crosspiece, you should see about half of your dowel hole is invading the hole for the crosspiece. Then, insert and glue a 5/8" dowel into the hole you drilled, use a coping saw to cut off the excess, so that the dowel is flush with the body. The process is the same for the bottom dowel hole.

Wooden Dummy Construction

You are now just about finished building the body, and the only thing left to do is to use a router to round off the edges on the top and the bottom of the dummy. Sanding them down instead works just as well, but it takes somewhat longer.

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