Ahhh okay, I think I get what you're saying now. Sounds like the stanchion pipe protrudes higher above the wire and that's why it's catching and why the tapping the lifeline won't release it?

Working on that theory, here is my modification to your roller idea, I haven't CAD'ed it up but can to give a better idea of my thoughts.

If you keep the same basic premise with the bulge on one side and lightly weighted to keep proper orientation but have the max width of the bulge part above the wire, when the sail presses into the bulge the force will create a moment between the bulge height and the wire height and this will make the fitting want to roll up and inward and flick the sail over the rail?

Anyway, it's just a theory...

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Crusoe said..

I have those on already. My stanchions on the Starboard side are too high above the lifeline for them to work.

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Jethrow said..
Ahhh okay, I think I get what you're saying now. Sounds like the stanchion pipe protrudes higher above the wire and that's why it's catching and why the tapping the lifeline won't release it?

Working on that theory, here is my modification to your roller idea, I haven't CAD'ed it up but can to give a better idea of my thoughts.

If you keep the same basic premise with the bulge on one side and lightly weighted to keep proper orientation but have the max width of the bulge part above the wire, when the sail presses into the bulge the force will create a moment between the bulge height and the wire height and this will make the fitting want to roll up and inward and flick the sail over the rail?

Anyway, it's just a theory...

Hi Jethrow,
That's quite neat. If I read this correctly, You're relying upon the counterweight to keep it standing upright.
Its axis of rotation is not centred but is biased lower in the assembly.
The assembly is "top heavy". Without its counterweight it would simply invert.
Any force pressing inwards would hence force it to roll inwards "up and over" the safety line.

Sound about right?

Vola, You should give it a name instead of assembly/thingammy/whatsit.
I reckon we should call it a Skirt. At least that's what everyone screams at me from the nice dry cockpit whilst I'm getting dunked like a tea bag on the leeward rail.
What about Volart?
Or NIgel? LIke nigel no-mates, very fitting for the poor old bowman getting flogged whilst all the dicky knee heads peer over the cockpit coaming yelling out words of encouragement/advice/instructions. 'Cos everyone knows foredecky's don't listen to the cockpit anyway .

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shaggybaxter said..




Hi Jethrow,
That's quite neat. If I read this correctly, You're relying upon the counterweight to keep it standing upright.
Its axis of rotation is not centred but is biased lower in the assembly.
The assembly is "top heavy". Without its counterweight it would simply invert.
Any force pressing inwards would hence force it to roll inwards "up and over" the safety line.

Sound about right?

Yeah, exactly!

Nope. Wouldn't work. It would still get caught up on the stanchion -





All I am basically designing is a big skirt wheel that everyone uses, with a flatter back so it doesn't get in the way and won't misshape the sail too much if it is against it.

Nah Velo
More like the two on the left than on the right. Imagine the left hand side one but where you have the maximum round horizontal to the wire and symmetrical, mine would have the maximum "side round" closer to the top, so sideways pressure would want to rotate it rather than press it into the wire.

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Jethrow said..
Nah Velo
More like the two on the left than on the right. Imagine the left hand side one but where you have the maximum round horizontal to the wire and symmetrical, mine would have the maximum "side round" closer to the top, so sideways pressure would want to rotate it rather than press it into the wire.

I get it now.

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shaggybaxter said..
Vola, You should give it a name instead of assembly/thingammy/whatsit.
I reckon we should call it a Skirt. At least that's what everyone screams at me from the nice dry cockpit whilst I'm getting dunked like a tea bag on the leeward rail.
What about Volart?
Or NIgel? LIke nigel no-mates, very fitting for the poor old bowman getting flogged whilst all the dicky knee heads peer over the cockpit coaming yelling out words of encouragement/advice/instructions. 'Cos everyone knows foredecky's don't listen to the cockpit anyway .

"SKIRT" sounds fantastic.
We could make millions out of this!
Shame it is just for stanchions that are too high. Not much call for it.
I want to measure my stanchion above the wire and design it accordingly.
I like jethrow's idea.

All good mate, when you're ready lemme know, will be a good fun! to see what some creativity and innovation can do!
These lower end 3d printers lack more in the size of job you can print rather than the resolution. I think it's 0.4mm so it shouldn't look too industrial. They take a few hours to run a print job though, even a small one.
I'm ordering some coloured plastic today, as I've only got black.
Be nicer in white than black methinks.

When you print it could you print the bottom half three times the thickness so the weight to keep it upright is built in rather than stuck on.

why not just use a jib or genoa that rolls out above the safety lines?

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samsturdy said..
When you print it could you print the bottom half three times the thickness so the weight to keep it upright is built in rather than stuck on.

Good idea

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Seebreasy73 said..
why not just use a jib or genoa that rolls out above the safety lines?

So you want me to buy new sails ?

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valo said..

So you want me to buy new sails ?

Sure, we all love spending other peoples money

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Crusoe said..

??

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valo said..

Crusoe said..

??

I think it relates to the staunchin height

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woko said..

valo said..

Crusoe said..

??

I think it relates to the staunchin height

Correct.
Not sure what the use of having a stanchion protruding way above the life line would be. Maybe they make them that way so the sail catches on the them.

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woko said..

valo said..

Crusoe said..

??

I think it relates to the staunchin height

Yeah I got that,

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valo said..

Seebreasy73 said..
why not just use a jib or genoa that rolls out above the safety lines?

So you want me to buy new sails ?

don't have to, you could have it trimmed?

If a stancihon is protruding higher than 10-15mm above the life line, one has a good chance to be skewered by it sooner or later.

This whole discussion is way way beyond me as my solution is - though functional - is definitely not elegant.
I replaced my old plastic covered ****ty life lines with 4 mm S/S wire and slipped a 1/2 inch electrical conduit over it.
It stopped chafing, snagging as it rolls over on the wire freely.
It's not an elegant sight but who cares, it works!

Hi Valo,
Got the final design mate, thx very much. It looks great! You obviously are really good at this design stuff, the amount of detail in that rendering is WAY above my hack capabilities! The good news is it all converted to gcode, which is the 3dprinter format, perfectly.
I sent you a PM, I do need some assistance in splitting the two halves, am having problem with artifacts I thunk.
Thanks mate,
SB

Edit; Love the embossed name!

In case you're wondering, this is an idea of the resolution, you can see the striated lines still but it's good enough for most jobs.
These are a set of handlebar standoffs for my brothers motorbike to ease the reach. This is what 3d printers seem to do well, weird one off jobs. It went from nothing measured to printed product in 24 hours.
Admittedly not all there yet, we're printing a few with different rakes to see what suits best, but still a lot of fun when previously making it out of steel was difficult.

Hi Shaggy.

PM sent with new files and a slight modification to design.
This is my first time doing 3D design that isn't a landscape. Goes to show that a good design program can make any mug look like a pro
They look great.
Can't wait to see how these come out.
Thanks very much.

PS. Your drive could sure do with a Gerni

G'day Valo,
I sent you a PM, but an Image of the design of the radiused half in my software before printing.

Thanks Shaggy
Here are the dimensions.

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Crusoe said..

Yes!! And just bang a plastic plug in the top $2 from mitre 10