Glen-L 14 Notes
Centerboard detail from plans
The centerboard should be faired as shown on the pattern
sheet (similar to the rudder as shown below). A weight of
approximately 11 lbs. can be attached to the bottom of the
centerboard. Optionally, the centerboard weight may be a
lead-filled hole approximately 30 square inches in size as
shown above. If this is done, it will be necessary to groove
the inside of the cut-out area so the lead will not fall out.
When pouring lead, be sure safety goggles are worn. A
centerboard sheave is installed as shown on Plansheet 3 of 5.
Bore a 7/16" hole for the 3/8" centerboard pin at
the point marked on the 
pattern. The centerboard is slipped into the slot
from the bottom; use washers between the trunk sides and the
centerboard, held in position with tape. The hole through the
centerboard and trunk should be well sealed (epoxy resin is
ideal for this). The pin is inserted through the trunk and
centerboard and capped on both sides with 1/4" plywood.
The centerboard lift uses pulleys to gain a mechanical
advantage in lifting the centerboard. A swivel block is
mounted to the forward trunk upright near underside of the
deck. The lift, which is a length of 1/4" line, is
threaded through a hole in the centerboard upright and
knotted so that it will not pull out. The line is lead
through the centerboard sheave and up through the swivel
block mounted on the forward trunk upright, and up to the
cockpit where it can be secured to a jam cleat mounted on the
aft area of the centerboard trunk. Some provision should be
made to lock the board in the "up" position. This
can be done by drilling a hole through the trunk sides and
the centerboard near the top and inserting a brass pin on a
chain that can be removed when the board is lowered.
The following is an option not shown on the plans
Materials: Replace 3/4" PW with 3 layers of 1/4"
PW.
1 Piece 1/4" x 12" x 12" steel plate
Use the Centerboard pattern to cut 3 pieces from 1/4" PW. Cut a hole to match the steel plate approx 3" from bottom and sides. Assemble, using thickened epoxy. The steel plate will be bonded in the hole in the center layer of plywood. Fair the centerboard and finish per instructions above.
"I have a set of 14 plans and have seen your notes on using a steel plate in the centerboard. Why not use the same building method as the steel only the size of the lead piece and just pour in #9 lead shot from a shooting sport supply house, add some epoxy to hold it together and not have any rust problems ever? Lead shot usually comes in 25# bags." - Cliff Biggs