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post #1 of Old 01-31-2012 Thread Starter
Tundra Down
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Mast tabernacle project

Anybody tried this? Are there reasons I shouldn't?

Rapidly rising costs of a boom truck, scheduling issues involved and the accumulation of my exploratory designs and models have brought me to the "jump off" point for my mast tabernacle project.

I would like to be able to raise and lower the mast on Tundra Down, our Islander 28, myself. The Norsea 27 DVD makes it look straightforward. I have built a mast base mockup and located the point of rotation on the mast section. I have a cardboard tabernacle mockup. It has been test fitted to the deck. It seems to work as expected. I will add an aluminum tube through the mast with an id of 1" for the ss bolt and cheek plates to each side of the mast base where the bolt will swivel. The tabernacle will be built to the width of the cheek plates. I will shorten the mast to accommodate the added thickness of the tabernacle base.

I am trying to decide how to route mast wiring and am thinking, having it exit the mast rather than be involved in the action of the pivoting base is prudent. I will eliminate the current access plate, it will be in the way of the pivot bolt, and replace it with one that provides an exit for the mast wiring. I would appreciate any ideas about this. Exiting the mast, where? The base of the mast is a busy place.

Shortening the uppers looks like a simple thing thanks to STA-LOK. Adding longer turnbuckles to the chain plates and a couple of shackles isn't rocket science either. I will add two eye pads to give me the purchases I need aft and figure out how to "capture" the base with the mast resting on the pulpit rail. I may need to strengthen the pulpit or build a crutch and brace it to the pulpit. The video of the Norsea 27 shows a nylon trailer roller mounted on the pulpit and that looks like a good solution. Keeping the down, resting, mast from rolling on its side will require some thought. I want this to be a solo operation if possible.

I also need a plan for storing the mast above the deck. We hope to travel the Erie Canal on TD. It will be nice to carry the mast overhead. I also want to use the mast as our winter cover's ridge pole.

Aluminum or ss for the tabernacle? I am thinking 5/8 tempered aluminum?

I am going to spend a day on this this week. Winter is wasting.

It should pay for itself in two storage cycles and free me from the boom truck! Ha!

All suggestions are welcome.

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Last edited by downeast450; 02-01-2012 at 05:11 PM. Reason: content
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