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Go Back   SailNet Community > On Board > Boat Review and Purchase Forum > Sailboat Design and Construction > Mast tabernacle project
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Topic Review (Newest First)
11-27-2012 05:18 PM
downeast450
Re: Mast tabernacle project

Busy, busy, having fun.

I am back on track with this and am determined to raise the mast in the spring A-La my new tabernacle. I will keep posts on this thread. My boat is stored in a yard that shares space with Nautilus Marine a marine metal fabricator. Those guys are keen to see it come to pass and have offered to come over and hand carry my mast to their shop door to weld on the cheeks and the compression tube. I have the full size models made of both the mast's base and the tabernacle. Ha! This year the boom truck was $175.00 each way. Enough! This will be my first winter staying in Maine all winter in decades and I am looking forward to getting a few things done. This is one of them.



Last March's pic. Filthy after a winter on gravel.

Down
08-30-2012 12:21 AM
dlblandjr
Re: Mast tabernacle project

this has been very illuminating exchange, thank you , one and all
Don Bland , Bristol 26
08-29-2012 07:40 PM
dem45133
Re: Mast tabernacle project

Quote:
Well , did it work ? these posts were in 2008 , 4 years ago, I have a Bristol 26 , I'd like to be able to run down some inland rivers and will need to step my mast to do so . So did it work ????
Don
If your were asking me, I joined in 08 but only posted that 3 weeks ago.

Finished the purchase arrangements on the Seafarer 30, had it pulled and placed the hard... now its get the trailer ready and haul it home. Turns out the previous owner thought he had a gold plated boat... thinks its worth 10k or so with only new ports and a waterpump...Needs a WHOLE lot more that that to get to that value. I'm in it for 4300 which upon a deeper inspection is likely a bit high, but its a done deal, plus all kinds of other costs to get it pulled... get the 27 off my trailer and fee it up, and go to Baltimore and haul the 30 home to Ohio. But I do like the boat, has the features I wanted... I'll make it feel better, but it will take more than I was anticipating when I did the eBay bid (yea, I know better too, but some wild hairs cloud the brain now and then... its incorporated into the XY chromosome thing... so says my wife, who is seldom wrong about such things BTW. We discussed it and she left it to me. Its my one and only retirement toy in a few years).

Dave
08-29-2012 05:01 PM
dlblandjr
Re: Mast tabernacle project

I like those comment greatly.
I'm a machinist as well and I've not seen any thing yet I could not make or remake a bit better . so yeah, yankee , ingenuity is what we are all about ,
and that's prolly why we sail as well , eh ?
don , Bristol cutter
08-29-2012 04:47 PM
dlblandjr
Re: Mast tabernacle project

Well , did it work ? these posts were in 2008 , 4 years ago, I have a Bristol 26 , I'd like to be able to run down some inland rivers and will need to step my mast to do so . So did it work ????
Don
08-05-2012 11:53 AM
dem45133
Re: Mast tabernacle project

Just to ad a little credibility to my concept (as I'm sure at least some of you are saying its a fools pipe dream).

I have lateral force "in motion" stability system worked out for the whole traverse from full up to full down... even in a worse case cross wind.

I have the initial pivot movement mast elongation problem worked out so as to not un-stay.

Leaning toward weather protected simple 12vt gear reduced motors and cabling systems... with manual hand crank backups. Conforms to the KISS rule. But hydraulics are not out of the question either yet.

Getting closer on concepts... time to get the old drafting table uncovered and start drawing it out and do the math. I prefer it over my CAD Program actually.

Yea...

Dave
08-05-2012 10:36 AM
dem45133
Re: Mast tabernacle project

Quote:
It is apparently much more common in other countries. I am also very surprised more people don't do it here being that most yards charge astronomical prices for this simple operation. I guess there are just lots of helpless people here with more money than mechanical ability. Didn't they used to call this kind of thing "Yankee Ingenuity?"
Yea, my kind of statement! Good job!

Dave
08-05-2012 10:27 AM
dem45133
Re: Mast tabernacle project

Hummm. interesting thread. On my 27 Buccaneer I lower the mast via the trailer's high mounted winch lowering to the aft and onto a temp cradle at the stern. It works but then I have to un-pin the base and carry the mast forward for stowing.

I now have a 30 ft Seafarer I will be trailering (yea I can) but it's mast is much longer and heavier than my 27's. I'd like to investigate folding options where it folds down with the base 1/3 going forward and the upper 2/3 pivoting aft... and stay fully stayed.

I'm getting old enough that a "push button mast raising and lowing system" is starting to look pretty attractive.

Has anyone ever seen such a system? Cables?, hydraulics?, compressed air? What are those million dollar toys doing? They are push button everything aren't they? If some factory can design and build something I can too.

No I am not dreaming, and have a full shop with machine tools too. I can design/build almost anything that doesn't require hot casting or aluminum welding. I don't have the tools/equipment for that (well yet anyway).

Yea, I'm for real...

Dave
03-12-2012 08:40 PM
smurphny
Re: Mast tabernacle project

Quote:
Originally Posted by downeast450 View Post
Yes! The diagram here actually shows a "triangle plate" being used exactly as you suggest. On the video there are two different boats used, one with a triangle plate and Ed's with a pair of nesting shackles. The nesting shackles are my druthers.

I wish I could share the video. If you are serious about doing this at some point it is well worth the price. Even if you just find this thread interesting it might be worth watching. It looks so straightforward I am surprised more boats in the 30' range don't do it. It will be so convenient to decide when the mast comes down and be able to store it on deck in an hour or so. Repairs, canal transit, storm prep and who knows, there is a trailer for the Islander 28 and I could store it in the yard. I have some "hardware" to build but nothing that is complex. It isn't even a thruhull install in complexity and will save us about $200.00 each way for a boom truck.

I am a little concerned about how to manage the "lever" extending out over the bow. I want to keep the solution as simple as possible. With the boom as a lever I wonder how the base could be un pinned and hauled aft while resting on the bow crutch's roller. I have a couple of ideas. It has to be done without using supports from land. How about a second crutch in the Avon? Ha! I will work on it next.

Thanks for all the helpful replies. These discussions are great.

Down
Well, I just went over and took the cover off the boat---A SURE way to guarantee more snow. I always raise/lower my mast at a place near Albany, just below the canal on my way up or down the Hudson. They have a very nice DIY gin pole and charge very little. What's more, they have a nice bar, great people and cold beer. That's really the only reason I've not done this yet. It is apparently much more common in other countries. I am also very surprised more people don't do it here being that most yards charge astronomical prices for this simple operation. I guess there are just lots of helpless people here with more money than mechanical ability. Didn't they used to call this kind of thing "Yankee Ingenuity?"
03-12-2012 04:11 PM
skygazer
Re: Mast tabernacle project

Quote:
Originally Posted by downeast450 View Post
I am a little concerned about how to manage the "lever" extending out over the bow. I want to keep the solution as simple as possible. With the boom as a lever I wonder how the base could be un pinned and hauled aft while resting on the bow crutch's roller. I have a couple of ideas. It has to be done without using supports from land. How about a second crutch in the Avon? Ha! I will work on it next.

Thanks for all the helpful replies. These discussions are great.

Down
Ahh! There is the catch, not on land.

Quote:
Originally Posted by skygazer View Post
As a cheap backup, here is an idea you might consider if you are on land. Take three poles and lash them together in a tripod which you would stand on the ground to help hold up the overhanging mast end when inserting and removing the hinge pin.
I mentioned being on land because I also would like to be able to do it on the water. I like to go to different places, and most around here in Maine have overhanging trees or limbs forcing me to raise the mast while bobbing about on the water. And of course, there are always bridges.

But bridges are easy, just lay the mast down while still on the Tabernacle. It's getting it from the carry position, to attached to the hinge, that is where the devilish details come into play.

That really makes the dropping aft more appealing, due to less overhang. Does your boat have the raised cabin behind the mast like in the screen shots? I saw one production boat with the mast forward of the cabin like that, but it had a foot high tabernacle so the mast could clear to the rear. I don't think I have a photo, but if I find one I could post it.

I agree, this discussion forces one to get a better grasp of what's involved, and it's helpful to read other's concerns and insights. The best reason to have discussions, iron sharpens iron and all that.
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