Looking for DIAM-24s in NA

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mundt

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the mast being "rotating" adds to the inherent instability too.  I think an F-27 non-rotator makes the procedure much easier.  As Amati said, using a bunch of lines, even low stretch, on a somewhat flexible platform with a rotating mast, add in some wind, a shaky trailer, or on the water, some innocent bystanders, a creaky back...party party! 

 
MultiThom

MultiThom

Super Anarchist
1,855
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Benicia, CA
Rotating mast clearance at the cabin deck requires keeping the mast rotated while raising/lowering (some Hobies and Windrider 17).  If that's not an issue, then a crutch attached to the mast (providing leverage)--some designs just have a hole that the crutch fits in. Can also be an A frame located on the foredeck....I think Corsair 24s or 27s used to use the ama (durmsticks) for the leverage).  On my SeaRail, the front mast rest on the trailer comes out of the trailer and is used as the crutch.  Crutch is stabilized by a fitting on the mast base (slides in, but other systems just attach crutch to the same mast stabilizing lines (temp shrouds).  Temp shrouds pivot in the same line as the mast.  What helps a lot (on Corsairs and SeaRail) is a raised rear mast crutch so that first 10 degrees has reduced forward thrust which is what can break your mast base.  On my Hobie I modified the trailer to install a rear mast crutch to simplify mast raising--the rollers also make it easy to move the mast from trailering position to raising position.  

 
M

mundt

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I've lowered and raised the r33 mast many, many times to go under a certain bridge.  The main sheet is re-run so it's long enough and then winch and human power are used to handle the business, mast dropping forward, boom serving as gin pole.  Halyards become side stays and a couple lines go to the boom to stabilize it.  It does work, though you don't have to get that lowest hypercritical 25% of the process where the loads seem to increase tremendously.  I think most of the r33 masts were around 45 feet and pretty heavily built and when you're on the water with that baby hanging out over the bow it's quite a special feeling.  The amount of damage that thing could do if any bit failed would be absolutely astonishing.   

 
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Amati

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Mast crutch proto #3, IIRR,  lower mast ~ 30lbs, maybe less:  it works while trailering, and stows ok while sailing, but better left in  tow vehicle...

95FB0DAA-208F-4719-BD9B-DA535760B971.jpeg

48540FD7-933C-46C2-B805-1EBAFC1FAF46.jpeg

 
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JoeyG

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The Corsair sprints have a plate at the mast base that locks the rotation to center while raising. The gin pole then slides into the mast in the same hole the boom goes into, just opposite side. Whole system works great and we raise the beefy aluminum rig in ~15 minutes. 

 
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Amati

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JoeyG said:
The Corsair sprints have a plate at the mast base that locks the rotation to center while raising. The gin pole then slides into the mast in the same hole the boom goes into, just opposite side. Whole system works great and we raise the beefy aluminum rig in ~15 minutes. 
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And that keeps the mast from oscillating side to side?  

 
M

mundt

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some beachcats have a hinge or locking pin to help with that but I don't think they would handle big loads.

 
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Amati

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mundt said:
the mast being "rotating" adds to the inherent instability too.  I think an F-27 non-rotator makes the procedure much easier.  As Amati said, using a bunch of lines, even low stretch, on a somewhat flexible platform with a rotating mast, add in some wind, a shaky trailer, or on the water, some innocent bystanders, a creaky back...party party! 
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For us it was a parade of about 30 1960 Impalas that were driving around the edge of trailer parking lot we were using as a boatyard.  No fins were damaged during the ensuing hilarity.  No one laughed, which was nice. Idaho fun.

 
R

randii

Member
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Sacramento area
Seems like this would be a great place for dedicated dyneema, more than co-opted sheets and haywards. 

That's what I'm planning for my 42' stick, at least. I've had enough fun and near missed on my various beachcat masts to prioritize almost no stretch for almost no stress.

Randii

 
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Amati

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I’d like to see the G32 mast raising system.  The most I’ve heard or seen  is ‘wow!’  & ‘the mast was already up when we arrived’ (!)  

Russell?

 
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Amati

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randii said:
Seems like this would be a great place for dedicated dyneema, more than co-opted sheets and haywards. 

That's what I'm planning for my 42' stick, at least. I've had enough fun and near missed on my various beachcat masts to prioritize almost no stretch for almost no stress.

Randii
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It winds up being heaps of line tangling itself into complicated knots, or lots of  baggies that may or may not be labeled, or left in the garage......

 
M

mundt

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I'm somewhat, almost, vaguely thinking I remember where in my garage I have that exact same box full of assorted mast raising gear.

 
A

Amati

Guest
On 2/21/2019 at 8:46 PM, Russell Brown said:

There's a part two to this video as well. The original system really can be done by a 12 year old in minutes.

Click to expand...

Thanks Russell!  Over the bows, lift the tip out of the red zone manually?  A pickup truck would be ideal, I suppose.  

A few questions? 

How much does your mast with float/wind indicator weigh?

How much difference in height and longitudinal space (I guess you’d call it?) between the mast step and shroud base at the deck is there?  It’s hard to tell during the bridge scene-

At what difference ^^^^^ do you reckon the bright line is to prevent the athwartship (horizontal) mast ‘pendulum swing of death’?

Do you use your running back stays as part of mast raising?

Do you adjust the shroud lengths (iirr, that’s part of self rescuing system for the G32) while raising the mast?

 
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SCG

New member
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NJ
Trevor, I am owner of Diam 24 which sails from Atlantic Highlands ,NJ

I have lightly sailed the boat for two seasons.I had a late start on the first season.

I have been a long time multihull sailor and  enjoy intermediate distance races,10 to 30 miles.I am still learning how to sail the Diam 24.I often go out with only two aboard,not allowed in class racing but works fine for this boat.The only time I felt need for third person was mainsail raising while motoring .In. stronger winds,12 knots or more, when sailing with two,I have learned to tie to a mooring to raise the mainsail.

The boat does fine in wind from very light to 20 knots.I have not sailed in stronger winds above 22.I have never capsized.

Most enjoyable have been day sails with wind in the 10 to 16 knot range and small seas.On the right point of sail from close hauled to broad reach ,you can nicely exceed wind speeds.The boat is very responsive with nice acceleration in puffs.All of the sailing equipment fixed and running rigging has been dependable.It is a well thought out set up.The carbon reinforced beams make for a stiff and sturdy platform.

I have adapted to wearing dry suit on cooler windy days.I can be comfortable in any weather now.

I have missed races that required nearby travel due to light breeze and limited distance ability of electric torqeedo engine.I have also missed multi day venues relating to high wind predictionsThe conditions were okay for sailing there but were predicted and turned out to be bad for the return..I could have  disassembled and reassembled at launch site,but I really do not like that option.

My initial assembly requires a full days time,,but includes many maintenance items.I store on the hard with mast up.Launch time once assembled is about 40 minutes.

I have had at least three pins break on propeller of torqeedo engine.In my case leading to tows back to the launch area.

I would be glad to answer any specific questions.

 
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