Hobie Forums
http://www.hobie.com/forums/

Carbon fiber tillers
http://www.hobie.com/forums/viewtopic.php?f=4&t=32914
Page 6 of 8

Author:  mmadge [ Tue Nov 23, 2010 7:30 am ]
Post subject:  Re: Carbon fiber tillers

So are we still pursuing this or has the notion fizzled out?

Author:  Tom Machette [ Tue Nov 23, 2010 8:08 am ]
Post subject:  Re: Carbon fiber tillers

From the first page of the thread.

xanderwess wrote:
Rule change for US has to start here, so send me a letter, with pics if you can, and I'll get a group of people together to research it and give it the go or no then we'll (as a group) submit it to the Rules Committee. I would prefer the HCA-NA act as a unit with rules changes.
Jeremy Leonard is ALWAYS on this committee and he picks a few other interested parties then writes a report. Its awesome.
Look forward to seeing it.
cw


If you have allready done this, then I guess it is out of your hands.

Author:  xanderwess [ Tue Nov 23, 2010 8:41 am ]
Post subject:  Re: Carbon fiber tillers

Tommy is right: But I have not gotten anything on this. I would suggest that Bobby Edmonds and Madge get together on this too. Once I have the beforementioned stuff, I'll nicely ask Jeremy (THE go-to-guy with equipment rules) and he'll get a group lined up to review, debate, discuss and direct.
cw

Author:  mmadge [ Tue Nov 23, 2010 10:17 am ]
Post subject:  Re: Carbon fiber tillers

You want a picture of a Carbon fiber tiller?

Author:  xanderwess [ Tue Nov 23, 2010 10:23 am ]
Post subject:  Re: Carbon fiber tillers

Yes, and all the facts about it. Pros and cons from you're perspective. That's why Bob Edmonds can help you with this. If you need his contact info let me know otherwise BING Arriba and get him that way.

Author:  Sail Revolution [ Tue Nov 30, 2010 12:25 pm ]
Post subject:  Re: Carbon fiber tillers

Here are the carbon tillers that I sell to the 'A' Class guys, and it dawned on me that they ALREADY ARE covered with heat shrink. In fact, after setting them down and coming back to take photos, I couldn't tell the difference until I picked them up.

EDIT: These tillers are no longer available, and they were not built by who I thought built them. Woops.

They have the same exact end fittings, the same tube section diameter, and are visually and conductivily (according to this rudimentary test) exactly the same.

Image

Image

Image

Image

Control:
Image

Author:  srm [ Tue Nov 30, 2010 12:56 pm ]
Post subject:  Re: Carbon fiber tillers

Quote:
They have the same exact end fittings, the same tube section diameter, and are visually and conductivily (according to this rudimentary test) exactly the same.


A couple mils of heat shrink isn't going to do squat as far as electrically insulating the stick if you run substantial current through it. Plus you have to consider that the outer coating of the stick (heat shrink, epoxy, etc) could be damaged.

I would be much more interested to see a test where you took a 1" long section of each tube and tested the conductivity along the length of the section by probing across the cut edges of the sample.

I really think you're going to have a hard time proving that carbon fiber sticks (or anything made using carbon) is non-conductive. Which brings us back to the question - why do the sticks have to be non-conductive in the first place? Eliminate or revise general rule 11.1 and the problem is solved. Perhaps require conductive tiller extensions to have a warning label in the same way that masts do.

sm

Author:  Sail Revolution [ Tue Nov 30, 2010 1:09 pm ]
Post subject:  Re: Carbon fiber tillers

This is exactly why I stated the test as 'rudimentary', your points are valid to the argument.

What is conductive? I agree with you that it doesn't really matter.

Author:  OLD SCHOOL 18 [ Tue Nov 30, 2010 7:15 pm ]
Post subject:  Re: Carbon fiber tillers

Even the "non-conductive" sticks can become more conductive, or much less of an insulator, when dirty and/or covered in salt and grime.

Testing the carbon sticks from the inside is not really applicable since that's not where you'd be handling it in normal use.

Come to think of it we should have a warning label that tells us not to sail in winds over 5 knots due to increased risk of capsize. :roll:

Author:  srm [ Wed Dec 01, 2010 4:33 am ]
Post subject:  Re: Carbon fiber tillers

OLD SCHOOL 18 wrote:
Testing the carbon sticks from the inside is not really applicable since that's not where you'd be handling it in normal use.

I disagree. The rule states that the tiller extension is to be non-conductive, not just that the outer surface is to be non-conductive. If instead of carbon fiber, the stick was made of a copper rod coated with a thin heat shrink, would you still have the same opinion?

Quote:
Come to think of it we should have a warning label that tells us not to sail in winds over 5 knots due to increased risk of capsize.

The new boats more or less do. They come with a big warning label stuck to the front crossbar that warns about all kinds of sailing risks, including capsize.

sm

Author:  OLD SCHOOL 18 [ Thu Dec 02, 2010 1:50 am ]
Post subject:  Re: Carbon fiber tillers

srm wrote:
I disagree. The rule states that the tiller extension is to be non-conductive, not just that the outer surface is to be non-conductive. If instead of carbon fiber, the stick was made of a copper rod coated with a thin heat shrink, would you still have the same opinion?
sm


Just for kicks... (and it's winter)

The rules don't clearly define how to measure "non-conductive". Which is part of the problem. Therefore depending on your desire to have a carbon extension or not, it will be very arguable. It could be said that the rules state that the tiller extension is to be non-conductive, therefore if I encase a copper rod in plastic, then yes, it is now for all practical purposes "non-conductive".

But the copper rod is going to be much heavier that carbon fiber and therefore won't sell very well. :lol:

I'll tell you that I could sail with a gold tiller extension and not have any concerns with being electrocuted.

The mast, and many of the components you sit directly on while sailing are made of aluminum. Aluminum is more conductive than copper. Go sailing in an electrical storm and you're more likely to have fire bolts shoot up your arse, than to get your thumb blown off. :shock:

Seriously, you"re sitting on an aluminum crossbar, holding onto a stainless steel cable attached to a 33 ft. aluminum lighting rod. :oops:

And we're discussing the conductivity of a tiller extension?

The safety issue, and the cost issue both appear to be just a couple of red herrings.

In my opinion, the current verbiage appears to be a holdover from the past with no current bearing on performance to support its continued use.

Image

Author:  Little Wing [ Thu Dec 02, 2010 11:32 am ]
Post subject:  Re: Carbon fiber tillers

Very well said and I agree.

Author:  Harry Murphey [ Tue Dec 07, 2010 11:12 am ]
Post subject:  Re: Carbon fiber tillers

.... and you guys wonder why I've given up on getting any changes/upgrades approved for the H18???

... it's properly called "RISK ACCESSMENT" ..... and most of the time it seems that the risks are not evaluated in a decending order .... and any risk, no matter how small is enough to scuttle any positive change no matter how huge the benefit.

Oh, by the way I have one of those "rubber" tiller connectors on my Laser .... and I have to replace it all the time ... usually at least once (or twice) a year .... and usually after it has broken during a race!!!! Give me a SS fitting w/ a clevis pin and a "Hotstick" extendable tiller stick... as they don't seem to break too often .... maybe the hotstick wears out every 3-4yrs .... and that is why I wouldn't use a universal rubber tiller connector. But it should be the skipper's/owner's choice either way .....

I think the reason for the "heat shrink" is not for insulation ... but to help protect against UV damage and prevent the "splintering" of the tiller stick's fibers, with the resulting potentionally painful injury to one's hands during use. (Note: please reference my previous posts about covering my hotsticks w/ 1/8" neoprene ... it also helps prevents damage to the rudder blades when tacking/jybing from the tiller stick.)

And , yes I'm LOLing since the H16 class is having trouble w/ a simple rules issue .... I reference my posts about modifying the H18 Trap system ... and the argument, "it may get tangled underfoot" ....

Ya .... right .....

Author:  mmadge [ Thu Dec 09, 2010 12:50 pm ]
Post subject:  Re: Carbon fiber tillers

You are absolutly right on that Harry,very hard to get change.It is Ice boating season now so I am passing the torch if someone else wants to take up the cause.There is some good allies out there,(Bob Edmounds,Greg Thomas,Pat Porter...)There is also a minority of advocates against it.Some times minority rules in the Hobie world.

Author:  xanderwess [ Fri Dec 10, 2010 9:52 am ]
Post subject:  Re: Carbon fiber tillers

Quitter.

Page 6 of 8 All times are UTC - 8 hours [ DST ]
Powered by phpBB® Forum Software © phpBB Group
http://www.phpbb.com/