Rowing across Atlantic

[lacage]

You could consider my method of boat building which would be unsinkable, light,fast and cheap to construct. My Web-Site is no longer being hosted, but you can view my Blog-Spot " Bournes Way " which shows a video of a boat being sprayed from the outside with expanding eurathane foam. Cheers from down under Peter Bourne

[Simon C]

Traditionally solo rowers were very seperate to race rowers. In fact there had only been 2 solo entries in both the 2005 and 2007 Atlantic race. Solo rowers had always been quite imaginative in terms of boat design and many think that the solo discipline in ocean rowing in its purist form.

In an attempt to encourage boat development the organiser made the solo class into an open class. This was intended to have an interesting effect within the solo class only. The main race is held within the pairs class. The open class for solo was then governed by a box rule. We took the existing size boats, measured them all and then set a box no larger than the existing cabin size's.

Charlie Pitcher was the only person to start from scratch and come up with a "plain paper" design. He obviously turned the boat around, lowered the gunwhale, reduced the length, produced the boat from composite and flatened the bottom. By then reducing the size of the aft cabin, the boat could uniquely pick up wind.

Now Charlie is an exceptional athelete, has a good knowledge base, completed a large number of sea miles prior to the race and basically completely dedicated himself for two years prior to the race. I'm not convinced that just anyone rocking up with his boat would perform anything close to his level.

The other classes of the race will not become "open" in the same way as the solo has. There are very few solo rowers and the impact on the overall race probably won't be repeated. It was a very unusual weather year for the Mid Atlantic. The race was the slowest it had ever been, there were only a few short periods where there was any favourable following conditions. Most boats encountered counter currents and found the going very tough. All the crossing times were very slow - my personal view is that in a "normal" year, the pairs boats would have hauled Charlie in. I believe as the wind increased and sea conditions got tougher then Charlie's boat would have been a handful - but the next person that uses Charlie's boat will be the real proof of the design advantage.

Ocean Rowing will ultimately find "fair" windage on boats. Those campaigns that intensionally go out to gain a large wind advantage will ultimately de-value their own achievements. There is one boat in particular this year that is basically a house sat on two hulls - this has a very clear ambition to gain as much wind assistance as possible...

Mr Efficient - yes you can head down to the Southern Ocean and "surf" around the planet in a rowboat if you fancy. Be careful not to be rescued though!!! ;-)

Simon

[Mr Efficiency]

Originally Posted by lacage

You could consider my method of boat building which would be unsinkable, light,fast and cheap to construct. My Web-Site is no longer being hosted, but you can view my Blog-Spot " Bournes Way " which shows a video of a boat being sprayed from the outside with expanding eurathane foam. Cheers from down under Peter Bourne

Bit of an eye opener that ! Still trying to get my head around it !

[Mr Efficiency]

Originally Posted by lacage

You could consider my method of boat building which would be unsinkable, light,fast and cheap to construct. My Web-Site is no longer being hosted, but you can view my Blog-Spot " Bournes Way " which shows a video of a boat being sprayed from the outside with expanding eurathane foam. Cheers from down under Peter Bourne

Lacage, what was the density of that sprayed foam ? I assume the higher the density the better for structural integrity, with a weight/cost penalty though.

[michael pierzga]

Originally Posted by Manie B

Gents I have been asked to look into building a TWO MAN rowboat to cross the Atlantic. My part in the grand scheme of things is purely to build the hull and deck, "the team" will do all fitting out and finishing.

They are obviously looking for sponsors because to do a race like this is VERY expensive, entry fee's alone are some 16000 pounds

Anyway I agreed that I will see if I can do the build in ply and epoxy (aramid and carbon) which I am familiar with.

Have any of you come across any drawings and specifications? It will be a great help. I need basic sizes and specs if you guys can help? My initial idea is a multi chine setup that I will do in freeship to minimize drag and wetted area. Also what do you guys think of the idea to incorporate a skinny carbon fibre daggerboard with a bit of lead ballast, just to add a bit of stability in extreme weather - say 40kg by 1m deep, that can easily be lifted by hand, mounted in the middle of the boat, that coupled to a retractable rudder "could" give better control in bad weather when rowing is impossible and you are hanging on a series drouge JSD ???

your ideas will be appreciated

http://www.woodvale-challenge.com/At...wing+Race+2011

http://www.oceanrowing.com/sale/index.htm#HERITAGE

thanks

Might be worthwhile , educational and help your design doodling process to spend 40 quid and buy a copy of Uffa Fox's plans for Britannia 1 and 2

http://www.uffafox.com/britann2.htm

[RHP]

Originally Posted by Simon C

By then reducing the size of the aft cabin, the boat could uniquely pick up wind.

This is my sole contention, its not a 'rowing' boat anymore but wind assisted which distorts the purity of the challenge - to row a craft single handed across an ocean. Charlie's boat harnessed windpower to assist the forward movement and and efficency of his physical effort to maintain momentum. The distortion was great enough for Charlie to beat the leading twin oar boat by a substantial distance. I accept open rules might be a good idea in single rower however you have to define that the boat must be a rowing boat and avoid the passage becoming wind assisted or the ethos of teh challenge, the purity is compromised.

I'm not 'having a go', simply expressing my disappointment when I both saw Charlie's boat and the outcome of the race.

[gonzo]

Yes, that is my understanding also. They have "Spinaker cabins" which amount to fiberglass sails. In my opinion that is plain cheating. There should be an upwind part of the race. That would eliminate all those boats and probably many of the competitors.

[michael pierzga]

How do those boats deal with ballast ? I assume they leave fully laden with enough takeaway pizzas, mountains of Italian sausage, great wedges of Parmigano cheese, bucket of olives, bricks of Snickers bars... to supply power for a long leg. As the stack of pizzas and Snickers bars are fed into your intake and vented out your stern tube, the vessel must become lighter ? Do they use ballast tanks to bring the vessel back into trim ?

[lacage]

The density of foam is 2 LB / cubic foot. There will be a slight weight penality, but you gain a built in life-raft, and insulation that will save you from the elements when inside. The foam adds to the strength, but in my larger boats its nice to get as much strength as possible in the steel skeleton, which is cost and time effective. You can get a 4Lb and 6lb density foam. I have only used the 2LB density.
Cheers Peter

[Mr Efficiency]

Originally Posted by lacage

The density of foam is 2 LB / cubic foot. There will be a slight weight penality, but you gain a built in life-raft, and insulation that will save you from the elements when inside. The foam adds to the strength, but in my larger boats its nice to get as much strength as possible in the steel skeleton, which is cost and time effective. You can get a 4Lb and 6lb density foam. I have only used the 2LB density.
Cheers Peter

Alright, thanks for the reply, this is a bit of news to me........ferro/foam/GRP/ply construction.

[lacage]

Where in my Method of Construction does it mention ferro. Ferro has nothing to do with it.

[Mr Efficiency]

Originally Posted by lacage

Where in my Method of Construction does it mention ferro. Ferro has nothing to do with it.

err.......steel ? That's the ferro part !

[kerosene]

ferro here will be easily understood as ferrocement - not ferrous metal. Thus the confusion - my guess anyway.

[Mr Efficiency]

Originally Posted by kerosene

ferro here will be easily understood as ferrocement - not ferrous metal. Thus the confusion - my guess anyway.

OK, I realise that but........instead of cement, he uses foam. I'd like to hear a structural engineer's opinion about that.

[kerosene]

I would not use hardware store PU foam from a can either.

lacage has -21 rep with 12 posts so that might be an indication of something.