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has anyone tried a ketch rig??
http://www.hobie.com/au/en/forums/viewtopic.php?f=71&t=57086		 Page 1 of 3
Author:  hawk232 [ Sun Mar 13, 2016 8:09 am ]
Post subject:  has anyone tried a ketch rig??
sitting around the other day looking at my outback's sail trying to think of a way to use it on the ti (with no alterations so that it can still be used on the outback) I came up with this. this is a prototype and I have to wait for lighter winds to test it out (I don't have much faith in the pvc holding strong winds).

the known issues with this setup:
- I drilled the tack hole too far down the boom, outhaul is not tight enough
- the sail can not really be taken down as currently designed, its either up or down
- pvc construction is likely not strong enough

If it works out well, I will see about having the frame made in aluminum, the boom will also be aluminum. The boom will have a sleeve that slides over it with a block at the outer end and a line that runs from the sleeve, to the block, back to the mast end of the boom where it will be cleated. This should allow me to adjust the outhaul as well as furl the sail. The new boom will have proper mid boom sheeting.


I would love to hear other thoughts on what issues I may face!


Image

Image
Author:  TI_Tom [ Sun Mar 13, 2016 8:53 am ]
Post subject:  Re: has anyone tried a ketch rig??
Interesting. I love the innovation. I'll be watching this thread just to see how it all works out.

Sent from my SPH-L720T using Tapatalk
Author:  vetgam [ Sun Mar 13, 2016 11:24 am ]
Post subject:  Re: has anyone tried a ketch rig??
We are all so out of control. :D But keep it up. Dying to see if it performs. You may get weather helm and have to ride the rudder to stay on course. Hopefully not.

I'm banking the mast will hold up if the same mast that came with the sail.
Author:  hawk232 [ Sun Mar 13, 2016 12:35 pm ]
Post subject:  Re: has anyone tried a ketch rig??
well I sail mostly solo and get a great deal of lee helm as it is, so a little weather helm would be nice. I am not worried about the mast holding, but my make shift pvc "mast base/step" contraption on the other hand...
Author:  vetgam [ Sun Mar 13, 2016 2:51 pm ]
Post subject:  Re: has anyone tried a ketch rig??
If the mast holds,that PVC will.
Author:  hawk232 [ Sun Mar 13, 2016 3:02 pm ]
Post subject:  Re: has anyone tried a ketch rig??
we shall see. I am looking for like a 5mph day to test it initially... tomorrow looks like 10-20 so I will probably be sailing, but just with the main...
Author:  tonystott [ Mon Mar 14, 2016 5:48 pm ]
Post subject:  Re: has anyone tried a ketch rig??
This is really spooky... At the same time you posted your ketch rig message, I was in bed (1am local time) and started to think about how I could add a ketch rig to my TI. My thoughts involved adding a base for the mast inside the hull, but otherwise I had similar thoughts to you.

What is the saying? Great minds think alike, fools never differ. :D :D
Author:  hawk232 [ Mon Mar 14, 2016 6:05 pm ]
Post subject:  Re: has anyone tried a ketch rig??
well get to it! with two of us working on it we can only end up with a better end result.

initially I was shooting for an in kayak step, but the main sheet would interfere, that's why I did it this way. maybe I'm too narrow minded though??
Author:  ChangeMan [ Mon Mar 14, 2016 7:10 pm ]
Post subject:  Re: has anyone tried a ketch rig??
Ketch rigs are great having more choices and easier to handle sails.
So I think Hawk and Tony are onto something.
I just completed 180 Nm sailing around the lowest point of the Australian Continent in the ketch H28 below.
Image

It also proved that Hobie seats are more comfortable than you think.

Cheers,
Brian in South Australia
Author:  hawk232 [ Sun Apr 24, 2016 3:06 pm ]
Post subject:  Re: has anyone tried a ketch rig??
finally tested it out the other day. Please remember that this was a makeshift setup with parts that I had laying around to determine if the setup was worthy of further refinement.

Since I had no way to quickly furl the mizzen, the only comparison I could do was just letting go of the sheet to depower it. When I did that I consistently saw speeds.8-1.0mph slower than with the mizzen pulling. it definitely seems feasible to me. the boat also felt much more balanced. I have ideas on a boom that will allow for furling/outhaul (and MUCH better shape than seen in the vid). now to start working on it... or to get an AI2 instead... hmmm...

https://youtu.be/Vh7IlVbMjm8
Author:  dvt [ Mon Apr 25, 2016 8:06 pm ]
Post subject:  Re: has anyone tried a ketch rig??
Nice. I notice a fair amount of lee helm in my 2015 TI as well; maybe it's because I sail solo from the rear seat, too. So while the discussions of jibs are interesting, I think it might make the lee helm worse. Your proposal might be more feasible.

The photobucket links don't work for me. Did you move the pictures of your rig?
Author:  vetgam [ Tue Apr 26, 2016 5:52 am ]
Post subject:  Re: has anyone tried a ketch rig??
Thanks for the update Hawk232. Certainly looks like the mizzen is pulling its load. This has been interesting to follow.
Author:  hawk232 [ Tue Apr 26, 2016 8:08 am ]
Post subject:  Re: has anyone tried a ketch rig??
dvt: hmmm, the photos are showing up fine for me. they have not moved either. Is anyone else having problems seeing the pics?
Author:  Bazinga [ Tue Apr 26, 2016 8:19 am ]
Post subject:  Re: has anyone tried a ketch rig??
I can see them just fine.
Author:  TriBlue [ Tue Apr 26, 2016 2:49 pm ]
Post subject:  Re: has anyone tried a ketch rig??
I can see both the photos and the video with no issues!

From the video the Mizen seemed to work fairly well although there did seem to be some luffing going on... maybe it was not possible to quite set it properly with your rigging or maybe the Main was somehow interfering with the Mizen's sail flow or maybe you just did not have it fully properly set during the video?

Might we get to see this rig in action should we get up to Cedar Key???

Don
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