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PostPosted: Sun Jun 17, 2012 1:44 pm 
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Two short bungie balls are all you need.

Image

If you use your paddle to launch and land (rare for most of us) you can install the Hobie quick-disconnect clips on the outside of the Akas.

A solid one piece kayak or SUP paddle works best out there, cuz you'll find it convenient for leaning on, while riding your new seats.


Last edited by NOHUHU on Thu Oct 24, 2013 7:35 pm, edited 1 time in total.

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PostPosted: Mon Jun 18, 2012 8:09 am 
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Location: Atlanta Ga
stringy wrote:
kidkilowatt wrote:


Kid,
The aka span on a TI is 1.4m and an AI 1.5m.
I've tried 20mm plywood and it bends like a banana over those spans. You would need to add a truss of some sort. There are fibreglass 'scoop' spineboards available that might handle those spans but they are heavy and expensive.


That ain't plywood, it's specially designed medical/lifesaving equipment

I would think most any back/spine board will be able to hold 1 above average sized human male in both length and weight capacity.
here's one:
72" X 16" X 2 1/4"
Ultra Light 11.5 lbs. / Standard 14 lbs.
"Unlimited single-patient weight capacity " (similar boards claim 500# capacity)
http://www.thelifeguardstore.com/produc ... tegory=913Image


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PostPosted: Mon Jun 18, 2012 1:29 pm 
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The best ones are still made from urethane-coated marine ply. Too expensive though.

The rotomolded ones, like the Prolite you showed, look great though. Most are contoured and tapered, so you need to factor this into your mounting method.

I like this model:
http://www.prolitespineboards.com/prolitespineboard

Check out the advantages:
Perfect size
Indestructible
Low wind and wave profile
Great handles and mounting points built in
Will float up to 250lb ea.
Easy to put neoprene padding on.
Comes in Red, yellow and "tactical" black :twisted:

These guys will even do custom graphics for you.

Seems like a great idea.


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PostPosted: Tue Jun 19, 2012 5:49 am 
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Location: Marietta Ga.
NOHUHU wrote:
The best ones are still made from urethane-coated marine ply. Too expensive though.

The rotomolded ones, like the Prolite you showed, look great though. Most are contoured and tapered, so you need to factor this into your mounting method.

I like this model:
http://www.prolitespineboards.com/prolitespineboard

Check out the advantages:
Perfect size
Indestructible
Low wind and wave profile
Great handles and mounting points built in
Will float up to 250lb ea.
Easy to put neoprene padding on.
Comes in Red, yellow and "tactical" black :twisted:

These guys will even do custom graphics for you.

Seems like a great idea.


Looks very high tech, and I like the color. I thought my hakas were over kill at 650lbs capacity these hold 1000lbs. Does anybody know how much weight the akas will hold without damaging them? I know the tramps are rated to 200lbs and they probably fail before the akas.

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Louis
Marietta Ga.


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PostPosted: Tue Jun 19, 2012 5:54 am 
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Location: Sollentuna, Sweden, Europe
NOHUHU wrote:
I like this model:
http://www.prolitespineboards.com/prolitespineboard

Check out the advantages:
Perfect size
Indestructible
Low wind and wave profile
Great handles and mounting points built in
Will float up to 250lb ea.
Easy to put neoprene padding on.
Comes in Red, yellow and "tactical" black :twisted:

These guys will even do custom graphics for you.

Seems like a great idea.


I like it to. But too expensive and too heavy.
Who has succeded to make the lightest Haka?
I would like each Haka to weight under 7lb.
Possible without carbonfiber?

br
thomas


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PostPosted: Tue Jun 19, 2012 7:56 am 
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Location: Atlanta Ga
I would think that a board of these dimensions, designed for human use (no sharp edges etc), and quick handling for the lifesaver (light weight) would be best represented by the medical/lifesaving equipment community in the areas of strength, safety stiffness and lightness.
ie if they could make it lighter/stonger etc, they'd already be doing it for this product.
ie when you design a 7lb board to hold 1000#, you'll be set for life $$ manufacturing spineboards.

just a quick google on wood 2x4 weight 1.21#/ft, wood hakas with 4 boards 6' long would be about 30# each haka...not sure how accurate compared those actually out there (?)

the ProLite is only #14
or check out the 'Eco' model, it's 16# for $99, and I just don't think it gets better for that, considering i don't buy the wood, tools, work a bunch of hours, mess it up/repeat...i'm confident it works...and also has a residual value on craigslist.

or see the 'ProSlide' which weighs just 6#, but seems less sturdy:
http://www.prolitespineboards.com/proslide

the TI plus two crew is already 450-500# so when I'm a few miles out, just a few extra lbs of strength and EMT knowhow, that will also float me and my fish back home (lol) would be nice.

and if the boat sinks, you've got built in life rafts for each person....heck i'd almost consider these a necessary lifeboat for going offshore, with the happenstance that stowing them makes great benches.

how about strapping one of the small kayak sail/boom *under* the spineboard, and have a pre-drilled hole for mounting...after the storm breaks up your TI/AI, just sailboard back home....at least the uscg will love the fact you provided your own emt devices haha

This is what makes this darn island kayak so cool, lots of innovation potential

I'd like to see a quad-ama TI, with 8+ of these boards, a jib and spinnaker e-motor, and 3-4 guys go win a billfish tourney...strap some boards together and float the monster behind...
:)
Have a Hobie Day!


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PostPosted: Tue Jun 19, 2012 8:30 am 
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Capt Boozer wrote:
ie when you design a 7lb board to hold 1000#, you'll be set for life $$ manufacturing spineboards.


Well I don't want to design a spineboard, I want to design a Haka.
1000lb is a clear overkill.
But Eco model has the right price.
And the ProSlide has the right weight.
So maybe I have to check out spineboards more seriously.

Thanks for the links!

br
thomas


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PostPosted: Tue Jun 19, 2012 10:07 am 
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even better, design a haka with those specs and I'll be happy to patent it, sell the rights to prolite and keep the $$... :mrgreen:

Otherwise: 3" diameter Carbon Fibre tube, 5' long x 6 = 1 haka =$2040 each at 11.61#...good luck floating home on it ;-P
http://www.carbonfibertubeshop.com/large%20tubing.html

TI with crew is 500-600#, and we're trying to save 5-6 lbs.....(?)

a pair of stock tramps is $360, vs 4 boards are $400+ and you've got yourself a real boat almost...

Hey, I don't even have a TI yet, and I'm already putting extra amas and 8 boards on the one floating in my head...somebody needs to do it lol...


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PostPosted: Tue Jun 19, 2012 10:09 am 
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Do a search for "spineboard" on eBay and you'll find several in the $70 range! Here's an online store which sells them: http://www.progressivemed.com/estylez_ps.aspx?searchmode=keyword&searchkeyword=spineboard


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PostPosted: Tue Jun 19, 2012 10:54 am 
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Capt Boozer wrote:
Hey, I don't even have a TI yet, and I'm already putting extra amas and 8 boards on the one floating in my head...somebody needs to do it lol...


That sounds familiar, I am trying to design hakas to an AI that is not delivered yet. Who knows when it will arrive?

BTW stock tramps for an AI is $759 in Sweden. Something is happening on the long way to Sweden.

Br
thomas


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PostPosted: Tue Jun 19, 2012 11:44 am 
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Capt Boozer wrote:
Hey, I don't even have a TI yet, and I'm already putting extra amas and 8 boards on the one floating in my head...somebody needs to do it lol...
That's just the booze talkin, Mebbe you should lay down for a spell,.. :wink:

Image


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PostPosted: Tue Jun 19, 2012 12:00 pm 
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ok, a couple folks can now 'quad' their AIs:

http://www.ebay.com/itm/2-SETS-Hobie-Mi ... 5d3402672c

two sets of AI amas for $99

for real, compare the mirage adventure to *Island* conversion kit is $1749
which is basically the amas and a mast/sail...

here's two sets of amas for $99, from someone who dosn't even know what they're called...lol...

anyway, get the amas and put more hakas on it....there I stayed on topic ;-)


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PostPosted: Tue Jun 19, 2012 12:16 pm 
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Now you guys are talking! I just hope the price is not ridiculous (which I fear as it is "medical equipment".
http://www.pierce.com.au/Products/Rescu ... EN1202.php
5.6kg with a ONE TON load capacity, might even be strong enough for me!

_________________
Tony Stott
2012 Tandem Island "SIC EM"
www.scenefromabove.com.au


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PostPosted: Tue Jun 19, 2012 4:24 pm 
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Another photo:
Image


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PostPosted: Tue Jun 19, 2012 4:33 pm 
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Capt Boozer wrote:

That ain't plywood, it's specially designed medical/lifesaving equipment

I would think most any back/spine board will be able to hold 1 above average sized human male in both length and weight capacity.


If that is a wooden spineboard and it's not plywood then I'd be very interested to know what it is made from? :?

I've been using spineboards at work for a very long time and every wooden spineboard we have is made from plywood.

You need to be careful in thinking that because it's medical its strong enough to use as a haka. Spineboards are designed to carry an evenly distributed weight (a supine body) over a small span -note where the handle holes are. They are not designed for point loading over a long span -as in sitting on it.

I have tried our wooden 17mm plywood spineboard over the TI span and it would not support a body sitting on it. It bowed and would have broken if I sat on it unsupported. I weigh about 85kg. Note that an AI span is 10cm / 4" longer.
Image
As I mentioned the scoop style of spineboard that curve upwards at the sides to add strength will work:
Image
However I'm not sure that any flat style of board would. You would want to try it over the span to be sure.


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