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  #1  
Old 04-28-2016, 09:04 AM
Kentaro Kentaro is offline
 
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Harry Proa Bucket list

Hello everybody,

I like to go out of the box and seach for "new" things.

I just found this, the Bucket list, from Harry Proa, in New Zealand (perhaps this is not new, but at least, this is new for me...).

https://www.youtube.com/watch?v=ttXu3pRTzs8


I find it very interesting, and would like to built something similar for a smaller 16' boat.

Appart form the collapsible concept, I think that there are ideas which might raise some discussion...

- the shape of the hulls is very simple, with an almost square section, which can be easily built lightweight with multiply.

- this is a real shunting proa, we always stay on the same place, on the secondary hull.

- the mast is positionned symetrically, just on the middle of the main hull.

- there are 2 ruders, positionned along the main hull.

This concept seems to work well, as Harry Proa makes large daysailers based on it.

I really wonder why no amateur has tried to make such boat for smaller sizes.
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  #2  
Old 04-28-2016, 10:56 AM
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Tom.151 Tom.151 is offline
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Best to contact Rob Denny through the Harry Proa site.

He's designed and built plenty of similar smaller proas - he might be able to provide plans for you from one of his earlier works.

He's always been more than helpful.
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  #3  
Old 04-28-2016, 11:46 AM
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Doug Lord Doug Lord is offline
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A bit more here: Bucket List
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  #4  
Old 04-28-2016, 01:09 PM
Kentaro Kentaro is offline
 
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Thanks Doug for the link.

I think this is exactly what I am looking for:

https://www.youtube.com/watch?v=qTmdWAAW84M

The shunting seems to be so easy:

https://www.youtube.com/watch?v=H_gXcrx7v14


I have contacted Rob Denney.
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  #5  
Old 04-29-2016, 01:10 AM
Gus7119 Gus7119 is offline
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Quote:
Originally Posted by Kentaro View Post
Hello everybody,

I like to go out of the box and seach for "new" things.

I just found this, the Bucket list, from Harry Proa, in New Zealand (perhaps this is not new, but at least, this is new for me...).

https://www.youtube.com/watch?v=ttXu3pRTzs8


I find it very interesting, and would like to built something similar for a smaller 16' boat.

Appart form the collapsible concept, I think that there are ideas which might raise some discussion...

- the shape of the hulls is very simple, with an almost square section, which can be easily built lightweight with multiply.

- this is a real shunting proa, we always stay on the same place, on the secondary hull.

- the mast is positionned symetrically, just on the middle of the main hull.

- there are 2 ruders, positionned along the main hull.

This concept seems to work well, as Harry Proa makes large daysailers based on it.

I really wonder why no amateur has tried to make such boat for smaller sizes.
Yep Rob Denney is your man he has a 60 ft cruising cat almost the same and is really happy to chat boats you'd be silly not to approach him at least he's got some fantastic designs email him

harryproa@gmail.com

And have a look at his site
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  #6  
Old 02-26-2017, 12:26 AM
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Corley Corley is offline
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Rob has posted a few photos of the prototype's launch on Facebook: https://www.facebook.com/Harryproa/p...19837484915444
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  #7  
Old 02-26-2017, 07:41 AM
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Doug Lord Doug Lord is offline
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Thanks, Corley. Congratulations, Rob!
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  #8  
Old 02-26-2017, 05:43 PM
rob denney rob denney is online now
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Tom, Gus, Doug,
Thanks for the kind words.

Kentaro,
An updated version of the boat in the video could be built of ply, but would be lighter, less work and much cleaner if it was built using Intelligent Infusion http://harryproa.com/?p=1845

I have not received an email from you. Please send it to harryproa@gmail.com

The Bucket List launch went smoothly, although moving a 12m/40' x 7.5m/25' boat which draws 80mm/3" in 30 knots of breeze with a 6 hp o/board on an alloy dinghy was a bit challenging.
We should have the top section of the sail (6.5m/20' luff) in a couple of days and may be sailing by the weekend. Once we know the top section works, we will add the rest of the sail and see how the telescoping mast works.
A video of the launch will be on the Bucket List build blog http://harryproa.com/?cat=2 and harryproa Facebook page later today, as will reports and video of progress as it happens.
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  #9  
Old 02-27-2017, 02:12 PM
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Corley Corley is offline
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The launch video.

https://vimeo.com/205876914

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https://www.facebook.com/MultihullYachtClubOfVictoria
blog/projects http://trimaranproject.blogspot.com.au/
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  #10  
Old 02-27-2017, 03:31 PM
Barra Barra is offline
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Excellent.

Now the question is not" how fast it will go". but "how long will it last before bits start flying off it".

Ocean Racer??
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  #11  
Old 03-07-2017, 08:07 PM
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luckystrike luckystrike is offline
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bucket list

Capsizing when sleeping must be a funny thing when you climb out of the windward hull and look 7,5m down to the mast and sail lying in the water.

I imagine how it feels jumping from the 5 metre diving platform in our local swimming bath (and adding 2 additional metres) ....whou!

Rob, do you plan to carry a climbing harness or a parachute on board to get down to the leeward hull?

Michel
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  #12  
Old 03-08-2017, 06:17 AM
Barra Barra is offline
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Yes it will be interesting to see how it all pans out.

The crew righting bit should be fun with a telescopic mast full of water and the crew dangling in mid air from their tethers.
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  #13  
Old 03-08-2017, 07:13 AM
Tiny Turnip Tiny Turnip is offline
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Quote:
Originally Posted by luckystrike View Post
Capsizing when sleeping must be a funny thing when you climb out of the windward hull and look 7,5m down to the mast and sail lying in the water.

I imagine how it feels jumping from the 5 metre diving platform in our local swimming bath (and adding 2 additional metres) ....whou!

Rob, do you plan to carry a climbing harness or a parachute on board to get down to the leeward hull?

Michel
From the Harryproa website: 'Bucket List has a fuse on the main sheet cleat which releases at 30 degrees of pitch or heel. If it does capsize, the buoyant mast stops it going past 90 from where the buoyant boom will right it without the crew getting wet.'
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  #14  
Old 03-08-2017, 04:48 PM
rob denney rob denney is online now
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Quote:
Originally Posted by Barra View Post
Excellent.

Now the question is not" how fast it will go". but "how long will it last before bits start flying off it".
Not long, I suspect, but that is half the fun of designing and building something unique and near the limits. It is also a result of having the first examples of a developing building method for the hulls, beams and masts.

How fast do you think it will go? http://harryproa.com/?p=1837

Quote:
Originally Posted by Barra View Post
Ocean Racer??
Not as it is, but once the bugs are out, why do you think it won't be?

Michel,
Better to wake up 7.5m in the air than on the ceiling in knee deep water on an inverted cat or tri. There will be a rope ladder down the tramp when we get it to the capsize stage. Before that, we will have installed and tested the anticapsize fuse, so the ladder should not be required except to prove it is rightable.

Barra,
I am more interested in trying new ideas than I am in starting a racing multihull charter company so the boat as built turned out differently to the one in the video. If anyone is interested in the charter idea (4 boats in a container at $50k each), the original concept still stands, although as the concept is now 3 years old, there are a number of small things we would change to make it easier to sail and assemble, faster and cheaper.

The telescoping rig probably won't right the boat, although the sealed top section should keep it horizontal which will make righting easier than if it was upside down. Canting the mast will then be enough to right it. Be fun to find out, but there are a number of other things to play with first.

Tiny Turnip:
The boom righting requires crew input to winch the boom below the water. Part of this is done from the leeward hull.
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  #15  
Old 03-09-2017, 07:53 AM
jorgepease jorgepease is offline
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Nice Job - Congrats! Can't wait to see it in action!!
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