Custom Multihulls

[member 76956]

Do you know where I can find some Harry-Proa images from different angles? I mean like from all the different angles, like an orthographic projection.

I want to build a wooden model, to try-out different features.

 

[rob denney]

I've thought about this a little more; and, while the comments I think you're referring to seemed harmless to me and weren't intended to be disparaging, they can still have an affect, because even tech-support forums are globally indexed and can sometimes have great influence depending on what's being discussed and how.

I tend to think of myself as having little influence; but, modern social media algorithms have made that perception out of date.

If I owe you an apology you have it.

Thanks, not necessary. Your remarks weren't disparaging. Just difficult to respond to without specific things that you considered to be faults/not what you want. No problem.

I have attached the dimensions of the C50 and C60 to get you started on the model. There are also some different angle shots on the web page. If there is anything else required, let me know.

Let me know what else you want.

 

[fallguy]

How fast do those go?

 

[guzzis3]

No connection, but there is a 40' Harryproa for sale in New Zealand at a pretty low price. Looks demountable too.

tradeMe.title https://www.trademe.co.nz/a/motors/boats-marine/yachts/multihull/listing/3579793619?bof=VPtIESFw

View attachment 178511

That needs work. I had a careful look but it'd need to be a fair bit cheaper than 30k. Apparently it might go in a 40' container but I'd scrap what fitout there is and maybe some new sails. Gets expensive. Have you seen the youtube videos of it ?

FWIW there is nothing "wrong" with a HP just like there is nothing wrong with a 60' bridgedeck cabin cat, but I would be reluctant to get the latter because it doesn't suit my use. A 15m or 12m HP would be very nice, but so would other options. It's a personal thing.

Maybe instead of playing with designs first make a specific list of requirements. Do some accommodation drawings without considering hull shape rig placement etc then see how these match existing designs ? Remember it's a working sail boat as well as a floating holiday home so it has to function.

BTW there is a little HP you can build as an introductory project. Maybe that's a good place to start.

 

[rob denney]

How fast do those go?

Boat speed is essentially a function of weight, sail area and length. Bottom condition, wave size, point of sail, sail shape and the size of the driver's balls also play a part. Based on the weight/sail area/length formula, 2o knots won't be difficult. Sailing at windspeed from near zero to the high teens. Tacking through 90 degrees in medium size waves.

 

[lucdekeyser]

I hope you do not overlook the aspect of safety. In general, aviators are way more safety conscious than boaters. The cavalier reactions to safety discussions on forums like this one are a testament to that.

Feature by feature, HPs outshine other designs. There are a couple of threads on HarryProa@groups.io | Topics https://groups.io/g/HarryProa/topics that deal with that list specifically and compare it with like the best monohull cruisers focusing on safety. With these insights it is hard to unthink safety when looking at other designs however professionally done. Only when you have absorbed the safety aspect first is there room for thought about what compromise is best for your purposes between the classic triad, comfort, speed and costs with which you started this thread.

 

[brian eiland]

I agree with you about the second-hand boat market; and, that's probably where I'll purchase from, in the next 12 to 15 months. I want to get on the water, asap, and save more money. I'm not married to building. That being said. I'm probably going to start with my idea of a Magnum Opus, and then lower my expectations as time goes by.

For me, it's going to be offshore, as fast as possible, with as much space and comfort as possible. Maybe just myself, max occupancy two adults, two children.

Why don't you have a look around the web for a used Louisiane 37 cat,....I think you might really enjoy that vessel. You can probable find some nice updated ones at VERY reasonable prices COMPARED to building one.

I was the first importer to the USA long ago.
Brian RunningTideYachts.com

 

[brian eiland]

the Virtues of Shallow Draft

BTW I took that big cat thru the old back islands route of Hatteras

With well over 300 boats in this race, you can imagine the logistical problems of getting to shore from all of these boats (most not carrying their dinghy). We simply anchored the Stiletto 30 right off the small beach next to the college boat house and wadded ashore thru a foot or so of water.

On another occasion I did the same with a Louisiane 37 catamaran that drew 19 inches of water with the CB's up and the rudders kicked up.

Come to think of it I took that same Louisiane 37 down along the backside of the outer islands of Cape Hatteras, NC (there were times we were pulling the boat along while walking the shallows....what a great trip that was). I'm sure there are not many boats of that size that have ever made that trip.
Sail mag recently posting this short story of 'shallow draft' cruising
http://www.sailmagazine.com/cruising/sail-camping-hobie-16

 

[brian eiland]

Louisiane 37 catamaran

This is the 37 foot Louisiane catamaran I am speaking about, ...not bad accommodations for a 37 foot cat.

It had twin double berths, twin heads, saloon area (bit smallest), kick-up centerboards, kick-up rudders, and a retractable 9.9 4-stroke outboard that could drive it at 7.5 knots.

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[brian eiland]

perhaps you might consider building (or having built) something like this cat I saw in Thailand

Weekender/Picnic Vessel, Power and/or Sailing Catamaran https://www.boatdesign.net/t hreads/weekender-picnic-vessel-power-and-or-sailing-catamaran.33751/