2004 C36 MKII Tabernacle Mast

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blair
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2004 C36 MKII Tabernacle Mast

I recently purchased this boat and briefly mentioned this set up in another thread. There seemed to be some interest and questions regarding this set up, so I thought I would take a couple pictures and give a brief description of what I have.
I am not a writer, photographer, or even a sailor. I have very limited knowledge of sailing, the terminology, or this boat, but here I go.
I believe that this boat was originally keel stepped. It is now deck stepped, with a compression post. This was not done by the manufacturer. It was done by a local rigger.
Boat has in mast furling, but TM can be done on a traditional rig.
Tabernacle masts are not that uncommon in this area, but most are done on C30s. I have seen them on a 34, 380, 400, and even a 42. The 42 presents a whole different problem because of the swept back spreaders.
I have an axle that goes through the base of the mast that it pivots on. It is just forward of center, and mast lowers to the bow.
Mast can be lowered by an electric winch mounted in the port lazarette, or by a manual block and tackle set up.
The winch cable comes out of the lazarette and attaches to a pad eye by a turning block. The pad eye is located on the floor of the cockpit under the table, which tilts to the starboard.
Winch cable then attaches to the end of the boom. The block and tackle also attach to the pad eye and the boom. I believe this is mainly for safety in case winch cable breaks. There is also a safety limiter cable that is attached too. The safety limiter cable is measured to the exact length to allow mast to clear both the local bridges.
The rigger told me he designed the mast to be lowered all the way to the deck, without the limiter cable attached.
A bridle attaches to the back of the boom, and then forward to both of the middle lower shrouds.
Both the lower aft shrouds and back stays have quick release piston pins. When these are removed, you just push the button on the winch control, and the mast is lowered.
I have only done this once when I took delivery, but I was singlehanding, and it was real easy.
I hope to go out this Sunday, and will try to take a couple more photos of mast being lowered.
Last picture is proof of the easy one finger operation.

Blair White
2004 C36 MKII # 2169 "Dash"
Pacific Beach, CA

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Steve Frost
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Blair,

Thanks for posting, now that I see Corona's are involved it becomes perfectly clear.

We had some nonbelievers here, nice that you were able to dispell any conspiracy theories. Looks like a well thought out installation.

Cepheus dream
C36 MK I # 825
MK I Tech Editor No Mas

BudStreet
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You'll have to re-tune your rig every time you use it, yes? That's a big pain. It must look mighty strange when it's down, like a picador about to charge a mighty big bull? We pull our rig every year, that sucker is heavy, there has to be some pretty serious force there, you would hope the usual dork in the 40' power boat doesn't go by throwing his customary 3' wake when it is lowered. I get that it was done for a reason but I have serious doubts about that being as strong as the keel stepped original.

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blair
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Not sure about re tuning the rig. At my experience level, I probably wouldn't even notice if it wasn't completely dialed in.
A Picador? Yes, I imagine that is exactly what it looks like.
I will definitely keep my air horn in hand when going under the bridge. A large wake could cause me to hit it.

Blair White
2004 C36 MKII # 2169 "Dash"
Pacific Beach, CA

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LCBrandt
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Very interesting. Would appreciate some shots of the axle and tabernacle arrangement.

Larry Brandt
S/V High Flight #2109
Pacific Northwest, PDX-based
2002 C-36 mkII SR/FK M35B
 

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blair
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OOPs, guess I forgot this picture.
I'll have more this weekend.

Blair White
2004 C36 MKII # 2169 "Dash"
Pacific Beach, CA

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BudStreet
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Blair I was thinking more of tuning as in making sure the shrouds were properly tensioned to ensure the mast stays in column and is supported equally fore and aft and side to side, not so much performance wise.

Just wondering what happens with the headsail furling gear, particularly the foil, when you lower the mast? Does it just bend?

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blair
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B/S,

I guess it just kind of droops forward. I wasn't looking that closely at the bow. I was more interested in looking up to see if mast was going to go under bridge.

Blair White
2004 C36 MKII # 2169 "Dash"
Pacific Beach, CA

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gordonm
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what happened to the discussion on this mast, it was getting interesting. and still have questions on exactly how this is accomplished. surely not by just activating a electric winch without disconnecting stays- compression post replacing the rest of the mast? fill us in pls-

gordon
SlemBob #1668
1998 C-36 SR/FK M35BC
San Francisco

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blair
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Gordon,

Both the lower aft shrouds and back stays have quick release piston pins, that have to be pulled for mast to be lowered.

The compression post goes from the keel, to the base of the mast, which is now deck stepped.

What else would you like to know?

Inaugural sail is scheduled for tomorrow, and I'll take some more pics.

Blair White
2004 C36 MKII # 2169 "Dash"
Pacific Beach, CA

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gordonm
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thanks - pretty much covers it- interesting - sail the hell out of it!

gordon
SlemBob #1668
1998 C-36 SR/FK M35BC
San Francisco

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blair
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Kind of got served on my inaugural sail, but that's another story.

Here is the mast in the down position, getting ready to go under a bridge.

Blair White
2004 C36 MKII # 2169 "Dash"
Pacific Beach, CA

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Steve Frost
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Blair,

Thanks for posting this picture, looks like this system would give you a great ability to adjust weather helm under way.

Not being that familiar with this system I have a question, I will assume you are Mormon, hence the name Tabernacle mast and I assume you pray each time you use the system. Do other demomonations call it a Temple, Synagogue, Mosque or Chapel system?

Cepheus dream
C36 MK I # 825
MK I Tech Editor No Mas

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blair
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Steve,

"adjust weather helm under way"
I don't know what that means.
The system was designed to go under low bridges.

I didn't name or design system, and have no idea of the derivation of the name.

Blair White
2004 C36 MKII # 2169 "Dash"
Pacific Beach, CA

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Steve Frost
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Blair,

My apologies, I forgot you are fairly new to our group and may not understand me. I made the comments in jest.

If you are new to sailing, weather helm is generated when the center of effort or lift is too far aft on the sail plan and it forces the bow of the boat into the wind. On sail boards this is how you steer the board, pull the sail aft to steer into the wind and push it forward to generate Lee helm to turn downwind. I was jokingly suggesting you could adjust weather and lee helm by using you Tabernacle system, this is probably not a good idea thought when rigging the boat increasing and decreasing mast rake is a means of adjusting for weather or lee helm.

As for the religious reference to the name of the mast lowering system, this too was in jest.

My wife as well often has a hard time figuring out my wit. I like to think of it as sharp, some may term it nit.

Cepheus dream
C36 MK I # 825
MK I Tech Editor No Mas

caprice 1050
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Some manufacturers call this a "Hinged Mast". I guess they don't want to offend any religion.

__/)__/)__/)__Capt Mike__/)__/)__/)__
Punta Gorda Florida
1990 Std WK M35 Hull #1050

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blair
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Steve,

Humor. Got it.

Blair White
2004 C36 MKII # 2169 "Dash"
Pacific Beach, CA

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Thanks for the photos. Sorry for the post earlier suggesting that you might be putting us on.

How often do you plan on using this to go out and return under the bridge? I would think this might be a real bother for just a day or weekend sail.

Gene Foraker
Sandusky Yacht Club
Sandusky, OH
1999  C36  #1786
Gypsy Wagon

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blair
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Gene,

I have to lower it every time I go sailing.
It's the only way I can get to the ocean.

This morning I found a way to shave off a few minutes of the process.
I replaced the back stays with industrial strength bungee cords.

I'm going to try it out tomorrow.

Blair White
2004 C36 MKII # 2169 "Dash"
Pacific Beach, CA

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TomSoko
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Kudos for Blair!!!

Take that, Steve!!

Tom Sokoloski
C36/375IA Past Commodore
Noank, CT

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I understand you have to do this every time you go to the ocean, I was just wondering how often that is. Some boaters here seem to use their boat for extended weekends or week or more long cruises, but not every weekend and not often for just a day sail. Others go more frequently, but not for many long cruises. Since this seems to be quite involved, I was just wondering if once out on the water perhaps you "make it count".

Is there a shortage of marinas or docks in your area on the ocean side of this bridge? In my area there are a few marinas and non-draw bridge areas with limited height access, but those tend to be primarily power boat marinas.

Gene Foraker
Sandusky Yacht Club
Sandusky, OH
1999  C36  #1786
Gypsy Wagon

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blair
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Gene,

Not sure how often i will use the boat, since i just bought it.
The two times i have taken it out, i was out 4-5 hours.
Going out again tomorrow.

Yes, slips are limited on the ocean side, but i already had the slip, and the boat was already tabernacled.

I hope to do a lot of 4 day weekends, with trips to Catalina Island.

Blair White
2004 C36 MKII # 2169 "Dash"
Pacific Beach, CA

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