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RE: Bulkhead 8 and CB Trunk alignment

To: "Rob DesMarais, D.C." <drrld@xxxxxxxxxxx>
Subject: RE: Bulkhead 8 and CB Trunk alignment
From: rowr@xxxxxxxxx
Date: Tue, 6 Dec 2005 19:28:07 -0800
Cc: swiftsolo@xxxxxxxxxxxx
In-reply-to: <020f01c5fa7b$d79ba3b0$0201a8c0@OFFICE>
References: <020f01c5fa7b$d79ba3b0$0201a8c0@OFFICE>
Rob, unfortunately I dont have my boat with me, it is still in Calgary, so I 
cannot help you there, maybe someone else has those dimensions?

Roger

Quoting "Rob DesMarais, D.C." <drrld@xxxxxxxxxxx>:

> 
> Thanks Roger,
> 
> Would you have the critical measurement you are referring to for the CB
> hole?
> 
> 
> 
> 
> Rob and others at this stage, I may have posted this before, if so, I 
> apologise, but it saved me a lot of time.
> I found a simple way of lining everything up, maybe others (Bram and anyone 
> past this stage can comment)
> 
> Before I installed my bulkheads and CB trunk, I cut the CB hole in the hull.
> 
> Laterally, you can see where this hole should lie, i.e. you should be able
> to 
> see the centre line of the hull, and then use a combination of the class
> rules 
> and station 6, 8 and the CB trunk, to see where the longitudinal position of
> 
> the hole should be. Once I cut the hole, I had a clear position for the
> bottom 
> of the trunk. I then cut a 2" high block which fitted perfectly into the CB 
> trunk and another one that fitted perfectly into the hole in the hull. By 
> gluing these together, you get a top hat section. You can then place this 
> assembly into the hole in the CB trunk and the other side into the hole in
> the 
> hull. Voila! Your CB trunk is perfectly aligned on the bottom, now all you 
> need to do is get the vertical right, and station 8 and 6 pretty well take 
> care of that.
> 
> Another thing..... get the CB trunk perfectly square before you install,
> DONT 
> install it if it has any bow to it or the sides cannot create a PERFECT 
> rectanglur hole where the CB blocks are going to fit. If these holes are not
> 
> perfect, or the sides are bowed, you are in for a nightmare every time you
> try 
> to fit the blocks and CB. If it is out, take your time and make another 
> one!!!!!! It will be worth the effort in the long run.
> Also, make sure that your measurements on the trunk are correct before you 
> install this sucker. If the CB trunk hole is too small, there is NOTHING you
> 
> can do to repair it once the deck is on. PRO-SET is for good!
> 
> Of all the methods that I tried for getting the fit of the hull to deck, the
> 
> best was the playdough. Easy and cheap to make by the bucketload. Once made,
> 
> you make little "mountains" of the stuff on as many points as you have time 
> for on the bulkheads, then lower your deck. Remove the deck and see where
> the 
> mountains have been compressed and remove some bulkhead, then repeat, and 
> repeat and repeat. The more time you take here, the better your boat is
> going 
> to perform and last.
> 
> One other thing. It may be usefull to come up with a way of locating the 
> centre bolt of the chainplate before you start, because every time you lift 
> the deck up, you are not sure if you replace it in exactly the same place 
> again when you lower it.
> 
> Hope that helps.
> Roger
> 
> Quoting "Rob DesMarais, D.C." <drrld@xxxxxxxxxxx>:
> 
> > I have a ¼? difference with CB trunk and Bulkhead 8 lining up.  The
> bulkhead
> > is higher.  6 lined up nice and flush.  I don?t know whether to cut down 8
> > or raise the trunks aft end?
> > 
> >  
> > 
> > Yes, I did cut down # 8 as Bram indicated.
> > 
> >  
> > 
> > Rob
> > 
> > 
> 
> 
> 
> 
> 
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> 
> 
> 
> 
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