Santana/Schock Forum


Good, God, Seth!

Posted By: Gary, Milwaukee
Date: 6/27/07 11:30a.m.

Report: outside forum guidelines

In Response To: humm... (pic) (Seth Dabney, 2023-C, Oxford, MS)

THAT'S your aft air chamber?!?!

I know that you 'glassed your WB tank... where in hell is that water COMING from?!

OK, rushing, as usual. However, to offer one explanation of the torque/pressure on the CB: first, I'm glad that he voiced my same thought, about the CB making contact both at the top of the trunk, and also at the (pin) bottom. Doesn't prove a damned THING, mind you, just makes me feel a little better with my thoughts on the subject!

Every time our boat heels, that CB absorbed and TAKES the pressure/force/torque head on in, well, 'battle'.

And while it is slow enough that we do not consider it this way, it is a flat surface that is, in ACTUALITY, being JERKED (hard and rapidly) in a lateral direction. Again, we don't tend to think of it this way, but it *is* being jerked... 'sideways', if you will.

Water weighs something like 8 lbs per gallon. Surface area, FORCE INVOLVED... even 'tho a 'layman' here, rather than an engineer, I can say with some certainty, at least within my own mind, that there ARE serious forces brought to bare against that CB.

Which is why I am thinking that with a fit as tight as you made (as I, also would have made), then 100% of all this force will be at ripping the CB pin out (specifically the screws, then the pin.

I am convinced of this. As such, whenever I get into it, I shall leave a noticeable 'gap' around the pin via the CB hole.

Think of it this way? Known 'facts'?

Some force actually RIPPED your CB out of the trunk. There is only ONE force that can even POSSIBLY be the culprit, and that is the force exerted against the CB, itself. And, even MORE specifically, this force (basically mandates) applied direct pressure against the pin. We know this as empiracal evidence, because NO PRESSURE CAN BE BROUGHT TO BEAR ON THE SCREWS... unless... I say again, UNLESS, that pressure is transmitted by WHAT?

Obviously, transmitted FROM the pin, itself, as this is the ONLY thing that can apply the pressure to the screws.

So in the above example/way of thinking... were I an engineer type, I'd probably call this, what, 'reverse engineering'???

One last thing, which I understand you've gotten from my attempt to explain (but hope you don't mind the overkill to be certain): as tightly as you made the fit, even IF the CB 'slides' across the pin to the oppoasing side during a course change (and we do not know that it does, do we?)... but even if it DOES, in this 'hypothesis'... then it (tight fit against the pin) would PREVENT it making contact in the upper trunk, along the opposit side, as Tom Schock mentioned.

Again, I am only saying that I THINK that I have figured it out.

As another 'overkill': let's say we install full 1 inch (thick) screws. Impossible, of course, but this is just to demonstate. If everything remains the same, then even those massive monsters will have the force, also, applied directly to them, rather than distributed.

Wouldn't they??????????????????????????????

Messages In This Thread

centerboard trouble & braintrust question -- Seth Dabney, 2023-C, Oxford, MS -- 6/24/07 8:34p.m.
I don't know about brain trust, but... -- Gary, 2023A, Milwaukee -- 6/25/07 7:17a.m.
Right but wrong -- charles pratt -- 6/25/07 4:23p.m.
delrin bushing -- Seth Dabney, 2023-C, Oxford, MS -- 6/25/07 8:16p.m.
Really? -- Bob Frak -- 6/25/07 9:30p.m.
Seth, be kind as I 'struggle' to express myself. -- Gary, 2023, Milwaukee -- 6/26/07 7:49a.m.
everything you said is right -- Seth Dabney, 2023-C, Oxford, MS -- 6/26/07 10:13a.m.
Well, if this *is* the culprit -- Gary, 2023A, Milwaukee -- 6/26/07 2:30p.m.
Clunk in the Trunk -- Bob Frak -- 6/26/07 2:59p.m.
humm... -- Seth Dabney, 2023-C, Oxford, MS -- 6/26/07 4:54p.m.
Pin fit -- Bob Frak -- 6/27/07 4:35a.m.
 Good, God, Seth!  -- Gary, Milwaukee -- 6/27/07 11:30a.m.
aft air chamber -- Seth Dabney, 2023-C, Oxford, MS -- 6/27/07 6:01p.m.
Seth, the real truth? -- Gary, 2023A, Milwaukee -- 6/27/07 10:28p.m.
pin roll -- Seth Dabney, 2023-C, Oxford, MS -- 6/27/07 5:38p.m.
Ahh! Unknown to me info: the hard aground info re your CB... -- Gary, 2023A, Milwaukee -- 6/27/07 10:39p.m.
An "off the wall" suggestion -- Tom Cannon, 2023A, Coupeville, WA -- 6/26/07 10:17p.m.
what kind of pin failure was it? -- Seth Dabney, 2023-C, Oxford, MS -- 6/27/07 5:51p.m.
A plug so to speak, and Moving to MD and for TOM S. -- charles pratt -- 6/27/07 11:03p.m.
Great ideas! -- Seth Dabney, 2023-C, Oxford, MS -- 6/28/07 5:47a.m.
Swedge -- charles pratt -- 6/28/07 7:48a.m.
As I recall, the pin broke.. -- Tom Cannon, 2023A, Coupeville, WA -- 6/28/07 3:11p.m.

 

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