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Tomahawk

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Post Options Post Options   Quote dics Quote  Post ReplyReply Direct Link To This Post Topic: Tomahawk
    Posted: 24 Jul 09 at 8:35am
I called Linton a month or so back. Appatently the project is still on but he decided he should be trying to earn a living too. Unfortunately he does not have the huge resource to throw at the project as other manufactures do. He was very positive that his project will be a success and being the only one developing this concept that he has to get it absolutley right. From what he said about the enquires he has had there seems to be a demand for his concept. So still on but will not be as quick to develope as other concepts.
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Post Options Post Options   Quote Guests Quote  Post ReplyReply Direct Link To This Post Posted: 23 Jul 09 at 8:53pm
Any news on this project?
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sargesail View Drop Down
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Post Options Post Options   Quote sargesail Quote  Post ReplyReply Direct Link To This Post Posted: 17 Mar 09 at 12:22pm

Cmon Fellas - a 300 is perfect - why complictae with foils!

If I wanted to fly I'd buy a plane/hangglider/parachute!

Matt

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Post Options Post Options   Quote Chris Turner Quote  Post ReplyReply Direct Link To This Post Posted: 17 Mar 09 at 9:45am

There is more development to go, production in May is un-realistic. The boat we displayed at the dinghy show is a development prototype.

For the record, the hull is Morrison designed, the foils Tomahawk and the product development has been done by Linton at Full Force. Ovington have been bought on board for production when the development cycle is completed should there be sufficient interest.

The intention with this boat is to offer a non foiling version and eventually a trapeze version.

As you can imagine to get all these configurations to work will take some time.

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Post Options Post Options   Quote Steve411 Quote  Post ReplyReply Direct Link To This Post Posted: 17 Mar 09 at 9:35am
More info on another website (Thedailysail.com). When it goes into production (May?) sounds like they will offer a non-foiling version, a foiling version and a foiling + trapeze version. Personally I'd prefer to keep it simpler and just have a hiking version. It's got wings, why complicate things with a trapeze (we have the 600FF for that already)?
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Post Options Post Options   Quote Guests Quote  Post ReplyReply Direct Link To This Post Posted: 16 Mar 09 at 2:37pm

I think there are two different things here, which need to be seperated. First is the Tomahawk foil, which is a new type of foil using graduated ventilation to control the lift force. Second is the Morrison designed concept boat. I have no doubt that the Tomahawk foil is a massive step forward for user friendly foiling (compromising some increase in drag for ease of use at "normal" speeds), and I can't see why this foil system could not be retro-fitted to a number of classes, if desired, including a to Laser itself (althought the rig is probably too full and bendy to get it to work upwind). Shove a carbon mast and battened monofilm sail on a £500 Laser, fit the T-Hawk and off you go!

I don't know much about the Ovi/Morrison boat, but I suspect there is a bit more development to go yet. At any rate, it would be wrong to judge the Tomahawk foil system based on how easy that one boat is to sail. 

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Post Options Post Options   Quote Medway Maniac Quote  Post ReplyReply Direct Link To This Post Posted: 16 Mar 09 at 9:47am

Originally posted by Jon Howes

wingspan matters!

The human powered boat people have long been aware of that, but also of foil area - too little and you need lots of power to take off/keep going, albeit fast, too much and you're slow if you've got the power. This reply just an excuse to post the photo, really! :

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Chris 249 View Drop Down
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Post Options Post Options   Quote Chris 249 Quote  Post ReplyReply Direct Link To This Post Posted: 16 Mar 09 at 3:27am

Jon, I cannot recall suggesting that the Monofoil was a scam; cannot see why that would have been claimed; and searches of BDF and SA show no such posts.

The BDF discussion between us was fairly civilised. I was genuinely interested in your Tomahawk foil as it seemed to be simple and had been subject to full scale tests.

Development is great. However, some of us may think that making claims of great future feats does not show a lot of respect for the state of the art and those who created it. I take your point (expressed on BDS) that you feel it's better to aim high.

Oh, and my apologies, the Moth quote was from someone else.

Mongrel, sorry if that's the way it seems to you; it's not the intention. Yes, I may be too tetchy when people criticise popular boats and I apologise for that.

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Post Options Post Options   Quote Rupert Quote  Post ReplyReply Direct Link To This Post Posted: 15 Mar 09 at 7:01pm
With the video, you are also comparing something with 30 years of development to an experiment. The hydrofoiling board looks very, very, cool, with an absense of wash and a Sci fi feel of it being above the water with no visable means of support.
Firefly 2324, Puffin 229, Minisail 3446 Mirror 70686
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Jon Howes View Drop Down
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Post Options Post Options   Quote Jon Howes Quote  Post ReplyReply Direct Link To This Post Posted: 15 Mar 09 at 1:33pm

Chris 249

"I think I put up two posts about the Monofoiler on BDF, when it was (as it
still is) at model stage. The study of sailboat design development,
including the interplay of theory and practise, has been a major hobby of
mine for a long time, and I've asked one hell of a lot of innovators about
it."

You did rather more than that, including implying the whole thing was a scam on the SA forum. Looking at many of your other posts on other topics you do have a certain "style". You REALLY don't like people having a go at developing anything you don't like, your logic being that you can't develop anything that you have not already done...... anyone spot the error here? Since your day is going so much more badly than mine I'll leave you to it.

"Listen for the crackling of
flames......"

Crackle crackle

In case anyone else is curious about wingspan and roll stability when foiling the board, span is settling out at 1 to 1.2 metres and rolling is only an issue when the foil is submerged since the water surface confers a little roll stiffness. As for the discontinuities causing drag, this only bites when not fully ventilated and submerged, when surface running the ventilation bubble encloses all the discontinuities. When waves are encountered the foil simply slices through the wave cap and takes the ventilation bubble with it. Linton reckoned that the foil was only on the water for about 25 to 50% of the time at speed, slicing waves does not bother it and this was a key aspect of its use on Monofoil. The famous foiling board video (nothing to do with me incidentally) where a normal board is burning past it shows a board on foils of tiny span, wingspan matters!

Jon.



Edited by Jon Howes
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