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The Pearson Center Boards (CB) have been the topic of discussion many times in the Pearson news groups. Those who have had deal with them have some grim stories to tell. Those who have never had any problems (yet) are dreading the day. I am in this second group and have no experience in CB problems. Below is a collection of pictures and general information I have collected concerning the specifics of the Pearson 35 Center
Board.
Posting on the Center Board from the Newsgroups:
- ...board weights ~200 lbs...will pivot on CB halyard (cable) after pin is removed if you lower board about 1 foot prior to removing the pin. ...no shims or bushing to replace. Pin accessed from inside below the cabin sole. Only comes out one way, since it is tapered. Need a punch to drive it all the way out. There are pipe end caps over the pin housing. Board moves from side-to-side about 10 degrees and clunks
when going down wind.
- Capt. Tom Micale, SV Raven
- Centerboard Cable replaced...3/16 wire ~12.5' long. Best way to replace the pennant is to detach it from the CB. Cut off the eye and carefully tape the plain end of the new pennant to it and gently pull it up into the boat. ...good time to inspect the pipe that the pennant runs in since it is red brass and will corrode over time and fail.
- Jack Armstrong, Westerly, RI
- I replaced my cable twice in the last two years. ...length is abut 12'. Boat needs to be out of the water so you can get the CB fully down and get at the heel of the board. I worked while it was in the sling. Tricky part is feeding the new cable down the tube with its two sheaves. ...if cable is not broken use the old cable to attach a messenger line and to the new cable and pull it through. Pull it through from
below and then attach the new cable to the CB. If this does not work you can unbolt the first sheave box from its attachment in the engine compartment and fish the cable through and on to the second sheave box just above the board. -Maurice Dickerson, Irvington, VA
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 A great picture of what a well kept and clean CB should look like. I might add, it needs some protective bottom paint. - These two pictures by Jim Adams |
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 This drawing is a very ruff hand sketch of the the center pin and cable connection area. The information is invaluable. Drawing made by
W. Ward Russenberry, Annapolis, MD. |
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This picture above shows the center pins capped on both sides of the cb trunk.
The picture to the left shows the cable block, cable tube and cable connection. |
CAD Drawing and dimensions for a P35 Center Board.
Note: Drawing and dimensions were taken in order to have a new board build. As of Feb 03, the board has not been completed and has not been installed. Dimensions are believed to be as accurate as possible but will be verified once the board is installed.
Many thanks to Larry Bragg out of Pensacola, FL for this information. Check back as Larry completes this project. |
Some of the dimensions from the drawing
Top of board
50 degrees - Arc on rounded end
17" to center of top radius
170 degrees - top radius
55" from center of top radius to end of board
Bottom Pin Area
140 degrees arc
1 3/8" hole area
2 1/4" hole from bottom
3 1/4" hole from side
8" long side of arc to bottom
22 1/2" from bottom left of board to cable notch
3" x 1 1/4" x 3" cable notch cut out
42" from cable notch to end of board
19 1/2" overall board width |
Mikhaya's CB getting a paint job |
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See the latest project on
Replacing
the Center Boat Cable |
