Centerboard Case

[Noklin]

I have looked at the pictures on the CD and the plans and I am still not sure of the answer. On a CS 20, does the starboard side of the centerboard case have an arm extending forward as the port one does or is it just cut at an angle to the top of the case to match the king post? It appears to me that it does not have the arm. Am I right?

[Dale Niemann]

I can only speak for the CS 17 and it is only on one side.  I bet that the CS 20 is the same.

Dale

[Charlie Jones]

The CS 20 only has the arm ( actually a stringer) on one side, just like the CS17

[Peter HK]

I just fitted the centrecase on my Cs17- here's a pic.

Peter HK

[Peter HK]

Gosh everyone is quick today.

By the time I had composed a reply and made a couple of thumbnails there were 2 other replies already there- a real time boat building resource

Peter HK

[Noklin]

Thanks for the fast replies.

This forum really is a gold mine of information and one of the reasons I picked the B&B boats to build.

After moving back to NC in Feb from AL, I am just now starting to work on the boat again. After being gone for more than 2 years, it has taken me this long to catch up on the many honey-do's.

[Noklin]

Well, silly mistake 1001 (at least). I marked the inside of the centerboard case sides, then completely ignored the marks and glassed the outside of the first one, instead of the inside. No real problem, other than the unnecessary use of the glass cloth and epoxy. The only thing I can say in my own defense is that it had been a long day and that was the last thing I had planned to complete.

I do have a question, why does the design only extend the port centerboard stringer to the forward bulkhead? Would it not be stronger if both side extended to the bulkhead? I am sure that it is not necessary, but I already have the right size stringer, which I will have to cut off for the starboard side. I understand that a lot of this unnecessary modifications can quickly add a lot of weight. Would it interfere with something?

[Peter HK]

Re the stringer, I think you nailed it in the question. You can always make it stronger and heavier, but if it is already strong enough why would you. I doubt it would get in the way but it's not necessary.

In boatbuilding of this type it's important to add LOTS of lightness, so that the performance of the finished product is all that you hoped it might be.

Go on - cut it off.

Peter HK

[Charlie Jones]

By the time you get the two cross supports in at the rear edge of the seat decking, and the center two installed that support the deck, you'll have all the strength you need. Plus adding the second stringer forward would interfere with seating those cross braces. You'd have to notch one side or the other anyway. I usually notch at a angle so the cross piece sits inside the fore and aft stringer, but is only in at the top level- the angle is as much as the vertical thickness of the cross part.

If that makes any sense. If not I'll set up a pic tomorrow ( today?) and show you.

Remember - every un necessary pound you put into the boat is an extra pound of dead weight. Also a pound of payload taken away. And you gain not much of anything. You paid for Graham's expertise- use it.