Return to Hobie.com

Hobie Forums

It is currently Mon Oct 15, 2018 3:09 pm

All times are UTC - 8 hours [ DST ]




Post new topic Reply to topic  [ 22 posts ]  Go to page Previous  1, 2
Author Message
PostPosted: Sun Mar 11, 2018 5:50 am 
Offline
Site Rank - Deck Hand

Joined: Tue Jan 30, 2018 10:19 am
Posts: 14
Location: Northern VA
As a fellow noobie I installed my tramps for the first time in the garage just yesterday to see how everything fits together. Is the extra rigging for the aka collapse required if using the trampolines?

With the tramps installed I could only collapse the akas about 6 inches. Are the tramps strong enough to prevent the full collapse and potential capsize if the pin breaks under sail?


Top
 Profile  
 
PostPosted: Sun Mar 11, 2018 6:34 am 
Offline
Site Rank - Old Salt

Joined: Sun Apr 26, 2015 3:13 pm
Posts: 326
The tramps should help in the event of a aka collapse unless they themselves are damaged. I would still recommend keep out lines just to be sure. Also, I find I don't always deploy my tramps as it takes extra time so it's good to have a backup.


Top
 Profile  
 
PostPosted: Sun Mar 11, 2018 1:34 pm 
Offline
Site Rank - Old Salt

Joined: Thu Aug 16, 2007 2:25 pm
Posts: 2771
Location: Central Coast NSW Australia
s9utct wrote:
Are the tramps strong enough to prevent the full collapse and potential capsize if the pin breaks under sail?

In my experience yes.
In 10 years of AI/TI sailing with tramps I’ve never broken an aka brace bar pin with the tramps fitted. I’ve never had a capsize either.
Two pin breaks on my AI’s occurred without tramps, with beginners sailing them and colliding with each other. Neither resulted in a capsize and both accidents were in strong winds so a broken pin does not necessarily mean instant capsize. Both managed to sail back to the beach and replace the pin.



Fusioneng has reported breaking tramp buckles in a collision, but his TI is highly modified.

It’s important to know that a capsize can occur with a broken brace bar pin. Being forewarned you can prepare accordingly with keep out lines or tramps, but it is not a given. Capsizes are extremely rare with these craft.


Top
 Profile  
 
PostPosted: Sun Mar 11, 2018 8:49 pm 
Offline
Site Rank - Old Salt

Joined: Tue Jun 19, 2007 6:14 pm
Posts: 3299
Location: South Florida
Stringy, I note in that video, your ama/aka never folds in fully along the hull, apparently because the paddle in its holder prevented it. If you had been sailing on a 180 deg tack and the opposite aka/ama brace pin broke, your aka/ama may have folded all the way and a capsize might have occurred. All conjecture, of course.

It absolutely makes sense, that some kind of preventative, tramps or keep-out lines, is needed to prevent capsize in case of the brace pin breaking.

Keith

_________________
2015 AI 2, 2014 Tandem

"Any intelligent fool can make things bigger and more complex ... It takes a touch of genius and a lot of courage to move in the opposite direction." A. Einstein

"Less is more" Anon


Top
 Profile  
 
PostPosted: Mon Mar 12, 2018 3:17 pm 
Offline
Site Rank - Old Salt

Joined: Thu Aug 16, 2007 2:25 pm
Posts: 2771
Location: Central Coast NSW Australia
Chekika wrote:
It absolutely makes sense, that some kind of preventative, tramps or keep-out lines, is needed to prevent capsize in case of the brace pin breaking.
Keith


Agreed Keith.
New owners should be made aware that the brace bar pin breaking is the major cause of potential capsize with these craft and be encouraged to fit keep out lines or tramps.
In the video, the reason the bar didn’t collapse backwards was that the operator (not me, one of my workmates) was holding the collapsed aka and pushing it forward. He was in my AI and did very well on his maiden voyage!


Top
 Profile  
 
PostPosted: Tue Mar 20, 2018 3:42 am 
Offline
Site Rank - Old Salt

Joined: Sat Nov 05, 2011 1:58 am
Posts: 2818
Location: Forster, NSW, Australia
I can't help thinking this is getting a bit out of hand...

"Keep out lines" in some form (basically running diagonally back from hull to outer aka end), will prevent instant capsize if a sheer pin breaks. (you can always fit the new upgraded aka inner ends from Hobie instead or as well)

Small lines tying the inner ends of each aka to its mate on the other side of the hull will prevent disengagement of either aka from hull.

BOTH problem fixed for under $10!

All done, time for a coffee.

_________________
Tony Stott
2012 Tandem Island "SIC EM" with Hobie spinnaker and Hangkai outboard
only cool people follow the (non-magnetic) titanium weight-loss program! lol.)


Top
 Profile  
 
PostPosted: Tue Mar 20, 2018 8:34 am 
Offline
Site Rank - Old Salt

Joined: Sun Apr 20, 2008 6:18 am
Posts: 2981
Location: Sarasota,Key West FL
I agree with Tony, we don’t need to design a new solution, that’s Hobie’s responsability, just a simple rope does the trick and only takes all of five minutes one time to install, (for the life of the boat, (my ropes and clips are 8 yrs old, whenever we buy a new boat we just transfer them to the new boat).
It takes all of 30 seconds to clip the clips on when you setup, when done we just unclip our clips and stuff our ropes into the mesh pocket for storage.
When we are on small lakes and safe areas, we don’t bother hooking them up, ( no need), you only need them offshore and dangerous conditions really.
No need to overthink this in my opinion.
We just use 3/16” cheap rope from walmart and a couple stainless D rings (2” from home depot). We tie a slip knot on one end of the rope ( like a hangmans noose), slip it over the front AKA hull brace where it attaches to the hull. Now clip the D-ring to the carry handle on the AMA, ( the handle is plenty strong). Then open the AMA and lock it open, now just pull the other end of the rope thru the D ring and tie it off, we use a clove hitch knot. You only need to do all this just one time, (takes all of 5 minutes). Afterwhich the rope stays on the boat forever, just stuffed in the mesh pocket when not being used. We only ever hook ours up when in rough conditions,offshore (easy to clip on even when your already out if conditions go bad).
It’s pretty easy to test, just unhook the aka brace and pull the ama back, it shouldn’t fold in more than halfway, next unclip the front aka bar and try to slide it out, it shouldn’t come out more than halfway.
This fix doesn’t prevent the aka sheer bolts from breaking, or does it prevent the aka bars from coming unclipped and try to slide out. It just keeps the boat from flipping, when this stuff does happen, ( happens all the time to us).
Hope this helps
FE


Top
 Profile  
 
Display posts from previous:  Sort by  
Post new topic Reply to topic  [ 22 posts ]  Go to page Previous  1, 2

All times are UTC - 8 hours [ DST ]


Who is online

Users browsing this forum: No registered users and 4 guests


You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum

Search for:
Jump to:  
© Hobie Cat Company. All rights reserved.
Powered by phpBB® Forum Software © phpBB Group