Hobie Cat Forums

It is currently Thu Nov 27, 2014 2:45 am

All times are UTC - 8 hours [ DST ]




Post new topic Reply to topic  [ 10 posts ] 
Author Message
 Post subject: SUPER AMAS on TI
PostPosted: Fri Jun 21, 2013 1:13 pm 
Offline
Site Rank - Admiral

Joined: Thu Oct 04, 2012 5:41 pm
Posts: 184
Location: Aussie living in San Diego, CA
Just dreaming folks....

Well no doubt that got your attention anyway :wink:

I was intrigued by the TI3 that NOHUHU and friends built - no doubt some others have done something similar too - I seem to recall someone making some s/steel akas. I have had similar thoughts about the wasted real estate on a TI since I recently bought one. Last weekend I put trampolines and the new Hobie hiking stick on the TI and that really emphasized the point for me as I was sitting in rear seat and only my forward passenger had access to the Tramps and hiking stick ! ) unless I awkwardly climbed forward and over to the trampoline ) I realized that the TI can only really be sailed from the front seat if I want to take advantage of balancing weight on the tramps even if sailing alone.

That stirred up the creative juices in me (they come and guy like hot flashes so I have to grab them when they come along) - I quickly visualized the TI with an extra standard Hobie Aka set behind the rear seat - looks like it could be mounted there OK . I remembered that NOHUHU and friends had used what appeared to be a clever canti-lever system to support a set of tramps at the rear of the TI and my mind went a slightly different direction. What if I could find a way to put a longer SUPER AMA on the TI that enabled the 3rd set of akas to connect into? That would be cool and my guess would be that it would add a measure of flotation to the TI at the same time which would also be good. It may even strengthen the boat and improve the safety factor. Additional weight of aka and ama would be countered acted by the increased flotation. It may also help reduce the submerging of the stern when loaded up. Can't see Hobie doing this anytime soon so I'm thinking I would have to construct my own out of marine ply or similar. It would need to be at least 15ft (maybe 16ft) long (compared to current amas of 13.5ft). But is still less than the kayak length so transporting and storing should be doable and maybe even folding would be too. Years ago I built a 16ft canoe using ply stitch and glue method and that would seem the route to go.

Cons would seem to be weight, storage, aesthetics, not to mention the cost and time to build.

Another possibility might be to get hold of an old used pair of TI amas and then cut and join ( by plastic welding and s/steel braces perhaps) the two amas to form one SUPER AMA . I just felt some gasps from the forum members that I would even consider doing that to a perfectly good ama :shock: Don't worry I'm not about to get out the saw....... :roll:

Before I allow my creative mind any further room to ponder this idea - has anyone built what I call a SUPER AMA for their TI? I would love to hear about that and any other suggestions to enable trampoline sailing from the rear seat of the TI ......

_________________
Life is the Journey - not the Destination
Image


Top
 Profile  
 
 Post subject: Re: SUPER AMAS on TI
PostPosted: Fri Jun 21, 2013 1:49 pm 
Offline
Site Rank - Old Salt

Joined: Tue Jul 19, 2005 6:29 pm
Posts: 2094
Location: High Point, NC
I haven't but if I was going to do it I'm make a box form and use expanding urethane foam for the ama body. Then carve/sand it to final shape. If you were to use something along the lines of a 10lb to 12lb density, you might could get away with just painting it. With the lighter 8lb, you'd probably want to skin it with a thin glass or carbon for surface hardness.

The stuff is fairly easy to work with. We've talked about making a kayak body out of it and trying out some ideas we've had floating around these past few years.


Top
 Profile  
 
 Post subject: Re: SUPER AMAS on TI
PostPosted: Fri Jun 21, 2013 1:55 pm 
Offline
Site Rank - Old Salt

Joined: Tue May 18, 2010 2:31 pm
Posts: 2755
Location: Kailua 96734
Matt must have been hiding those, the day you toured the Hobie factory. :wink:

But if you can't wait, I think you'd need to build them from Fglass. The trick with plastic would be matching the graduated curve of the Amas, extending their stern at least 2 feet and making the structure safe. And of course the 3rd Aka set needs to reach, and secure them. Then you need to customize the tramps.

Risky and $$$ with the original plastic ones. Very feasible with glass or wood though. Even inflatables, I would think. Would the boat still be foldable and trailerable? Maybe.

We feel that Hakas or wings in the back work better and are safer than tramps, which we also tried. So if you concentrate on building a wing seat back there first, you'll love it and you'll be taking the "TI3" concept to a new level.


Top
 Profile  
 
 Post subject: Re: SUPER AMAS on TI
PostPosted: Tue Jun 25, 2013 2:18 pm 
Offline
Site Rank - Old Salt

Joined: Wed Oct 19, 2011 6:02 am
Posts: 325
Location: Cape Coral, FL
something must be wrong with your boat, i sit in the rear seat and use the tramps or hakas all the time.

Image

Image

_________________
2011 Golden Papaya TI with a 250 square foot spinnaker!
also a more manageable 100 square foot spinny...
&
the TI3 rear ama mod


Top
 Profile  
 
 Post subject: Re: SUPER AMAS on TI
PostPosted: Wed Jun 26, 2013 10:55 pm 
Offline
Site Rank - Admiral

Joined: Thu Oct 04, 2012 5:41 pm
Posts: 184
Location: Aussie living in San Diego, CA
kayakman7 wrote:
something must be wrong with your boat, i sit in the rear seat and use the tramps or hakas all the time.
:lol: well thanks Kayakman7 - looking at your photo clearly I am missing something that the Hobie dealer forgot to include with TI :wink: Can you show the photo of the rear cross bar or maybe the thread that you may have already shown this mod?

_________________
Life is the Journey - not the Destination
Image


Top
 Profile  
 
 Post subject: Re: SUPER AMAS on TI
PostPosted: Thu Jun 27, 2013 2:52 am 
Offline
Site Rank - Old Salt

Joined: Tue May 18, 2010 2:31 pm
Posts: 2755
Location: Kailua 96734
Very sly Jesse! I've been waiting for your "coming out" party! :mrgreen:

(This is what Batman calls, SUPER SIDEKICK MODE).

We would love to see the video from that spinnaker run.


Top
 Profile  
 
 Post subject: Re: SUPER AMAS on TI
PostPosted: Thu Jun 27, 2013 4:10 am 
Offline
Site Rank - Old Salt

Joined: Sat Nov 05, 2011 1:58 am
Posts: 1565
Location: Forster, NSW, Australia
Aussie, as a standard TI ama supports 150kg already, I am not sure any extra flotation is needed. ( Kayakman's rearward position of the standard aka/ama setup looks like the business though). Tell us more kayakman!!

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


Top
 Profile  
 
 Post subject: Re: SUPER AMAS on TI
PostPosted: Fri Jun 28, 2013 7:13 pm 
Offline
Site Rank - Old Salt

Joined: Wed Oct 19, 2011 6:02 am
Posts: 325
Location: Cape Coral, FL
NOHUHU wrote:
Very sly Jesse! I've been waiting for your "coming out" party! :mrgreen:

(This is what Batman calls, SUPER SIDEKICK MODE).

We would love to see the video from that spinnaker run.


Well, you asked...

[youtube]http://www.youtube.com/watch?v=pURqgsklZFw&feature=youtu.be[/youtube]

Shortly after making this mod I bought my tamanu and started preparing for the EC2013 hardcore. I've only used it in this configuration a few times.

Cheers,

j

ps take a gander at the video of this years challenge.



look for my video at 20:50, 28:18, 30:59, 1:25:05, 1:35:30, 1:35:55 minutes.
dogslife has a bunch of video in it also, but i don't know where...
see some pics of the tamanu here: https://www.dropbox.com/sh/u1zorwxxs4h9a9m/LVuurFAb62
:( she is for sale :(

_________________
2011 Golden Papaya TI with a 250 square foot spinnaker!
also a more manageable 100 square foot spinny...
&
the TI3 rear ama mod


Top
 Profile  
 
 Post subject: Re: SUPER AMAS on TI
PostPosted: Sun Jun 30, 2013 10:24 am 
Offline
Site Rank - Admiral

Joined: Thu Oct 04, 2012 5:41 pm
Posts: 184
Location: Aussie living in San Diego, CA
kayakman7 thanks for the videos - the challenge was really good - I watched it last night - gives you a much better perspective of the real challenge. The spinnaker looks a bit scary but obviously exhilerating. With moving the amas back I think I see that you reversed the akas and probably installed another rear Hobie aka bar at the correct spacing behind the rear seat - is that correct? I also notice that you have reversed the bracing on what now is the forward aka (previously the rear aka) and am curious as to why or was the bracing forward facing on earlier TI's?

_________________
Life is the Journey - not the Destination
Image


Top
 Profile  
 
 Post subject: Re: SUPER AMAS on TI
PostPosted: Sun Jun 30, 2013 6:48 pm 
Offline
Site Rank - Old Salt

Joined: Wed Oct 19, 2011 6:02 am
Posts: 325
Location: Cape Coral, FL
I reversed the akas so that the braces, buckles, and other stuff weren't in the way when boarding after swimming. I replaced the braces with longer ones and moved the mounts to in front of the forward hatch when the akas are in the forward position. When the akas are in the rear position, the braces mount next to the front seat. The braces are also at a better angle for resisting collapsing now that they are longer.

The rear aka center is actually my old forward aka center with the roller cut off. I had cracks forming and Hobie replaced the bar. Since I had the bar already, adding the third center bar behind the rear seat was as rather obvious. It has provided an excellent location to mount the cam cleats for the spinnaker and the running back-stay.

_________________
2011 Golden Papaya TI with a 250 square foot spinnaker!
also a more manageable 100 square foot spinny...
&
the TI3 rear ama mod


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

All times are UTC - 8 hours [ DST ]


Who is online

Users browsing this forum: No registered users and 2 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:  
Powered by phpBB® Forum Software © phpBB Group