Radar Arch vs Bimini

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Frank C

Post by Frank C »

Duane Dunn, Allegro wrote:. . . I'm thinking the only solution that would make this work is a extention at the mast base that raises the step about 2'. This would raise the hinge point so the mast clears the dodger. I'd lower the gooseneck to bring the boom back lower, . . .
Actually, this is easier than it may seem and it does not require changing location of the mast step. Tony Smith has patented a leverage system for mast raising on the Telstar 28 that's quite interesting. It's a little difficult to describe, but quite obvious when you see it. Here's a stab at a description.

Imagine your baby stays are rigid, but they angle outboard and aft to deck-attachment points, three feet aft of the step. Now picture another pair that are deck-attached four feet forward of the mast step and about a foot below the aft pair. Now, assuming you have adequate tackle to control the mast weight, it can pivot aft on the bolt that pins the upper stays and forward on the lower pin. Once horizontal, remaining still pinned to the deck and roughly horizontal, the mast can lift-and-drop forward, pivoting on the twin pairs of rigid baby stays, so that its base meets the pulpit.

Sorry if that's too obscure, it's the best I can do. Maybe the Telstar website will illustrate it eventually. I'm still hoping to buy one with the Telstar, rather than duplicating it on my Mac!
8)
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Bobby T.-26X #4767
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26X Radar Arch Pictures

Post by Bobby T.-26X #4767 »

Here are some 26X radar Arch pictures...
http://taylorbob1.onfinite.com/album/151443/
Image
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Duane Dunn, Allegro
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Post by Duane Dunn, Allegro »

That's closer to the bulk of what I'm thinking off. Mine would probably rake back a bit further. It would have to be taller to clear my higher bimini. I also don't see the point of using the pedestal mast carrier when you have a stronger structure like the arch. Just add two tabs and a roller to the front tube. Gives a good place for antenna's, radar dome, solar panels, etc.
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Bobby T.-26X #4767
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Post by Bobby T.-26X #4767 »

if it is much taller (no more than 4"), the currently trailered mast will sit higher than OEM.
if you choose to use it as the primary mast support, you would need to use a larger dimension stainless steel.
it's currently 1" stainless tubing that matches the other stock railing.
it weighs a mere 28#'s, minus the two aft rails that are removed.
the 2005 M currently uses an arch/support that is a very narrow inverted U.
you can see it in this photo.
Image
i would be afraid that the one developed for the X would bend in the middle, unless it was made of 1.5-2" stainless.
the larger diameter stainless begins to create additional weight.
i also like the fact that the rear stay is now fastened to the X arch.
gets it out of the way, and can still serve Roger's intended purpose.
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Duane Dunn, Allegro
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Post by Duane Dunn, Allegro »

I'm not worried about the extra height. There is still plenty of room to carry the mast higher and still stay below the road limits.

I think the 1" could carry the mast just fine. It's only 100lbs with the furler. Not a big deal.

So are you saying your backstay now attaches to the arch? The picture above is no longer working, the link is broken so I can't take another look. That's an interesting idea. It would eliminate the need for the current backstay to pass through the top and back of my bimini like it does now. I would think this would have the potential to put more load on the arch than using it to carry the mast does.

Do you have any dimensioned drawings for what you built?
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Bobby T.-26X #4767
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Post by Bobby T.-26X #4767 »

the link above http://taylorbob1.onfinite.com/album/151443/ works fine. it has many different pictures available.
no...there are no dimensional drawings.
i first created it out of plastic pvc.
then i used lightweight conduit and a manual bender.
then i took some stainless to a shop, he put it on a digital bender, we welded & bent some more until we got it to it's current configuration.
I still need to complete a "form" so that we can replicate it (if we ever want to).

regarding backstay load...unless you are sinching it down to create a bow in the mast, you'll be fine.
if you want a bow in the mast to increase your sailing speed by .25-.5 mph, then go with the current backstay or split backstay and cinch it tight.
Image
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