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 1 
 on: April 06, 2020, 10:03:29 AM 
Started by JR FRANCIS - Last post by JR FRANCIS
Anybody have a set of Kent chock bars.
New or used.
Thanks

 2 
 on: March 31, 2020, 07:42:44 AM 
Started by T Thieler US 5224 - Last post by T Thieler US 5224
As you may have heard four important proposals are on the ballot for the DN class- It is very important that every member of the DN class vote on it! And remind all the class members you know to do the same- Spread the word!

ALL BALLOTING IS BEING DONE ELECTRONICALLY VIA EMAIL. It only takes a few minutes (even if you are not tech-savvy) and doesnít cost a thing. So donít wait for a paper ballot to show up in out in the mailbox!

All paid up IDNIYRA members should have received an email on March 25 from the International DN Ice Yacht Racing Association (invitations@mail.electionbuddy.com) inviting you to click a few links and file your vote on this Spring 2020 Tech Specifications Ballot.

IF YOU DID NOT SEE THIS IN YOUR EMAIL INBOX DO THE FOLLOWING ASAP:
-Make sure you are a paid up DN Class member (If not, join and get paid up and VOTE!)
-Check your spam and / or junk mail folders and make sure it isnít rotting away in there
-If you still canít find it or have any other questions email DN Class Secretary Deb Whitehorse at debwhitehorse@gmail.com and she can get you sorted out.

Chad Atkins wrote a good article about these proposals in the September 2019 issue of RUNNER TRACKS- He works with composites for a living and has been building and sailing DNs for decades; he is very qualified to comment and his opinions carry a lot of weight. Click the link and go to page 20.
https://139655-515924-raikfcquaxqncofqfm.stackpathdns.com/wp-content/uploads/2019/09/Runner-Tracks-September-2019-tablet.pdf

If you still arenít sure re-read the following explanations and opinions from Paul Goodwin- DN Class guru, builder, engineer, tinkerer and all around good guy:

My take on the 2020 Proposals Ė Paul Goodwin

The first two proposals are to change specs that were written when the class first made the transition from wood to composite masts. It was clear at the time that the composite mast would make the older mast technologies obsolete, at huge cost to class members. This was justified because we were breaking the older masts at an alarming rate. The idea behind the minimum weight and balance point specs was to reduce the incentive to constantly look for the latest, greatest, high-tech (and expensive) composite mast material.

1) Deletion of the minimum weight for the mast Ė

I think removing the minimum weight will not be good for the class. The intent of this spec is to discourage using exotic (and expensive) materials. High modulus carbon fiber comes to mind, but there are potentially more exotic and expensive fibers available. I believe eliminating the min weight will accelerate a technology war leading to lighter and more expensive masts. Sailors will have mast envy, with the perception that lighter is better, driving the cost of masts ever higher.
My Vote: NO

2) Deletion of the balance point on the mast Ė

The reason for the balance point was to make a builder put some of the ballast up higher in the mast, rather than building a super light mast with a big chunk of weight at the base. I think the spec is still valid. I donít want to make it easier to build super light, expensive masts. In the overall cost of building a pre-preg carbon mast in an autoclave, the time and cost of adding ballast is insignificant.
My vote: NO

3) Allow runners to be built of any material Ė

I think this proposal has no merit at all. I challenge everybody to think about how they would use this change to design a runner body that reduces the cost, and at the same time remains competitive against the super stiff lightweight carbon bodies that will be coming when there is no restriction on design and material. The DN is not the class for a rule that allows unlimited use of exotic materials.
My vote: NO

4) Amend the minimum thickness of insert plate to allow commercial material tolerance Ė

This one makes sense. The reduction in thickness allows use of commercially available steel, which can reduce the cost and is easier to find. The change is so small that it is insignificant for performance.
My vote: YES.

 3 
 on: March 30, 2020, 05:24:49 PM 
Started by Pjazz - Last post by wnethercote
If you are getting repeated failures near the swages or nicopress sleeves you may need a toggle on the end.

Don't most riggers have a junk barrel?  I've found really good stuff in the dumpster at my soft water club.  You just need to get over the embarrassment of dumpster diving - it wears off when the wire if free. 

 4 
 on: March 30, 2020, 05:20:32 PM 
Started by Pjazz - Last post by wnethercote
I have built a bunch based on Geoff Sobering's design, although now I use carbon fiber rather than plywood.  I used to use a fixed tiller.  It was either too short when starting or too long when sailing, and REALLY hurt when I dropped a runner into a crack.  A telescoping tiller is beneficial in more than one way!

 5 
 on: March 30, 2020, 08:52:23 AM 
Started by wnethercote - Last post by tasar
Post me in email given above reply. What package are you thinking and price ?

 6 
 on: March 30, 2020, 08:49:47 AM 
Started by tasar - Last post by tasar
striking distance to MI.    acat40@gmail.com

 7 
 on: March 28, 2020, 06:39:10 AM 
Started by Pjazz - Last post by MICHAEL
I have had one of these built by Ron. Works great. Twice in my early days of wipe outs, I broke the handle off and cracked the body. Both times a little glass cloth wrap have lasted 8 years!

 8 
 on: March 27, 2020, 05:03:18 PM 
Started by Pjazz - Last post by DN 5449
I have made a couple of these and they work great

 9 
 on: March 27, 2020, 12:50:33 PM 
Started by Pjazz - Last post by Geoff Sobering

Once change I've made to simplify the design is to lengthen the piece of wood underneath the aluminum to the full length of the cutout.
This eliminates having to make the short "step" cut in the foam.

I've probably made half-a-dozen tillers like this and the only ones I remember breaking happened during a crash.

Cheers,

Geoff S.
US-5156

 10 
 on: March 25, 2020, 10:16:33 AM 
Started by Pjazz - Last post by DN 5449
https://geoffs.net/ice/FoamCoreTiller/index.html

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