Folding Kayaks Forum

The user forum for FoldingKayaks.org
It is currently Tue Oct 17, 2017 1:35 am

All times are UTC - 5 hours [ DST ]




Post new topic Reply to topic  [ 10 posts ] 
Author Message
 Post subject: Alternative sponson
PostPosted: Thu Oct 06, 2016 12:39 pm 
recent arrival

Joined: Mon Aug 22, 2016 11:02 am
Posts: 4
Hi, i'm building a yost sonnet 16.
I had trouble finding sponsons (i live in italy), found them in germany, but are quite expensive...
At first i thought to build tubes with pvc, but it's not recommended, so i thought to use bags for vacuum preservation of food, i've found tubes 6m long and 15cm wide so i can make heat sealed sponsons of the lenght i need.
Just sharing my idea, hints and suggestions are appreciated!

Regards, Jacopo


Top
 Profile  
 
 Post subject: Re: Alternative sponson
PostPosted: Fri Oct 07, 2016 7:56 am 
recent arrival

Joined: Tue Dec 17, 2013 4:02 am
Posts: 3
Hi Jacopo,

I would not recommend to use food preservation bags, the foil normally is too thin and easily damaged. Also film tubing, as it is used by roofers (http://www.ebay.de/itm/10m-Folienschlau ... 1491663592) is too thin for this purpose.

It is not so difficult to make sponsons but I´d suggest to use heavier pvc. For my first set of sponsons I bought pvc with 300g/m2 which turned out to be not airtight, so I had to make them a again and this time I used the same material as for the skin (650g/m2).

Kind regards,

AndiG


Top
 Profile  
 
 Post subject: Re: Alternative sponson
PostPosted: Fri Oct 07, 2016 10:17 am 
recent arrival

Joined: Mon Aug 22, 2016 11:02 am
Posts: 4
that's the first thing i thought, but i also thought that the sponson is protected by the sponson sleeve and the hull, don't you think?
airthightness seems not a problem, i left an inflated sponson with weights on it for few days, no air loss at all


Top
 Profile  
 
 Post subject: Re: Alternative sponson
PostPosted: Wed Oct 12, 2016 7:53 am 
recent arrival

Joined: Tue Dec 17, 2013 4:02 am
Posts: 3
that's right but on the other hand it is very easy to get dirt, sand, little pieces of shells, etc into your boat and you will never get them all out again. They will rub on your skin and the sponsons. The thinner the sponsons are, the easier they get punctured. I measured my spare Klepper sponsons, their pvc is 0,4mm thick and they had already a hole from a rough landing.


Top
 Profile  
 
 Post subject: Re: Alternative sponson
PostPosted: Sun Jan 08, 2017 3:37 am 
faltbootemeister

Joined: Fri Sep 25, 2009 8:06 am
Posts: 105
Location: vienna/austria/europe
does someone test inflatible poolnoodles?


Top
 Profile  
 
 Post subject: Re: Alternative sponson
PostPosted: Sun Jan 08, 2017 10:44 pm 
Brotherhood of the Golden Paddle
User avatar

Joined: Thu Apr 14, 2005 4:47 pm
Posts: 1709
Location: Arlington, VA (i.e. Wash DC)
I have kid-tested inflatable pool-noodles in a pool and in a river with sharp rocks. They are surprisingly tough.

_________________
Chris T.
~'91 Klepper A2 w/ BSD schooner rig.
'64 Klepper Passat/Tradewind and T12 restoration projects.
Non-folding: '84 Hobie 16; early '90s Old Town Canoe.
Previously owned '04 Pakboat Puffin II and '05 Swift.


Top
 Profile  
 
 Post subject: Re: Alternative sponson
PostPosted: Mon Jan 09, 2017 2:53 am 
lord high faltbotmeister

Joined: Fri Oct 07, 2011 1:51 pm
Posts: 600
Location: Colombo, Sri Lanka
The issue is that a specific length over 16'and diameter 3.5"(?) is needed for this particular application

_________________
Simon

Pakboats Quest 135, Nautiraid Narak 460, 416 & K1 (sold my 550), First light 420, Feathercraft Wisper, Fujita Alpina AL-1 400, Incept k40 (for sale)
Non-folders: Cape Falcon F1. Beth sailing canoe, 2014 Hobie Adventure Island


Top
 Profile  
 
 Post subject: Re: Alternative sponson
PostPosted: Mon Jan 09, 2017 10:13 pm 
faltbootemeister

Joined: Fri Sep 25, 2009 8:06 am
Posts: 105
Location: vienna/austria/europe
simon: thinl about takeing 2 instead of one. if one is deflated/destroyed you will have the other one instead of none.
chris: thanks


Top
 Profile  
 
 Post subject: Re: Alternative sponson
PostPosted: Tue Jan 10, 2017 2:50 am 
lord high faltbotmeister

Joined: Fri Oct 07, 2011 1:51 pm
Posts: 600
Location: Colombo, Sri Lanka
In that case I suggest you research available detachable sponsons from shorter kayaks eg Advanced Elements for use nose to tail

_________________
Simon

Pakboats Quest 135, Nautiraid Narak 460, 416 & K1 (sold my 550), First light 420, Feathercraft Wisper, Fujita Alpina AL-1 400, Incept k40 (for sale)
Non-folders: Cape Falcon F1. Beth sailing canoe, 2014 Hobie Adventure Island


Top
 Profile  
 
 Post subject: Re: Alternative sponson
PostPosted: Tue Apr 18, 2017 6:44 pm 
faltbootemeister

Joined: Mon Feb 15, 2016 4:17 pm
Posts: 113
Location: Chicago
Pakboats have three small inflatable sponsons (attached to each other) on each side. I wonder if those might work--at least for the 14/6 Sonnet. I've sometimes thought of making a Sonnet, but finding sponsons seems to be getting harder. And the available instructions are pretty sparse.


Top
 Profile  
 
Display posts from previous:  Sort by  
Post new topic Reply to topic  [ 10 posts ] 

All times are UTC - 5 hours [ DST ]


Who is online

Users browsing this forum: No registered users


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
You cannot post attachments in this forum

Jump to:  
Powered by phpBB® Forum Software © phpBB Group