----- Original Message -----
Sent: Monday, April 29, 2002 11:39
AM
Subject: M_Boats: (no subject)
About a month ago I inquired on this list if
there was an interest in a new centerboard for the "old" M-17, and got quite a
bit of interest; looks like enuff to ppursue the matter.
Interest was divided between a bronze board and a
lead-filled glass board. There is no bronze foundery around here and
after a quick search the closest one is in the Los Angeles area, which would
mean shipping the boaards to here (Sacramento), where I would grind and drill
them, then ship them to the customer. The cost would be in
excess of a thousand dollars, which seems like a lot to me. A glass
board with a cast lead core would be lighter (120 lbs???) and there is no
good, simple way I can think of to mold in the tang which stops the board from
overdropping so it would have to be supported from the hoisting line, which
PROBABLY wouldn't be a problem considering the lesser weight of the
board. The good side is that the board should be less than half the cost
of a bronze one.
Something to consider is that several (many?) of
the older 17's have a problem of swelling cb trunks, probably due to water
getting in and causing rust. I could help this problem by making the
board about 3/4" thick instead of the original 7/8". Owners of boats not
having this problem- hopefullly the great majority- could shim the boards
around the pivot hole (a simple matter).
If I do this project it will be either in
mid-summer, when I am finished with the 23 project at Nor' Sea, or next fall
sometime. Also, I need an accurate paper pattern of a board as I
have no good measurements. The original foundry pattern disappeared
during the bankruptcy of the iron foundry that had made the boards for many
years. So if one of you pulls your cb in the next few months,
please lay it on paper (newspaper is fine) and trace around it with a marker
pen, not forgetting the pivot hole.
Jerry