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My creation and its weather helm problems

Printed From: Yachts and Yachting Online
Category: Dinghy classes
Forum Name: Dinghy development
Forum Discription: The latest moves in the dinghy market
URL: http://www.yachtsandyachting.com/forum/forum_posts.asp?TID=10859
Printed Date: 16 Jul 25 at 7:31pm
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Topic: My creation and its weather helm problems
Posted By: Reuben T
Subject: My creation and its weather helm problems
Date Posted: 06 May 13 at 7:29pm
A friend and I decided a while back to build a tiny boat to put the laser 2 rig on. We have finally completed this crackpot idea. It is just over 7ft(same as an oppy), has a 3.5ft bowsprit, and the boom overhangs the stern by about 3 ft. While it does sail, we are experiencing problems with huge amounts of weather helm due to the sharp bow digging in, and having the rudder much further forward than the laser2. We have raked the mast as far forwards as is reasonable but are still having trouble, are there any other ways to move the centre of effort forwards a bit without moving the whole rig?



Replies:
Posted By: Rupert
Date Posted: 06 May 13 at 8:04pm
Well done on doing it, and not just talking about it, like the rest of us on here!

My first thought is, can you move the CLR aft? A rudder gantry?

A longer bowsprit?


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Firefly 2324, Puffin 229, Minisail 3446 Mirror 70686


Posted By: PeterG
Date Posted: 06 May 13 at 8:46pm
Loads of respect to you for taking it on. Best of luck with it.

Your centre of effort from the sails is clearly too far aft relative to the lateral resistance of the hull. Something has to change. Putting the rudder on a gantry will reduce tiller loads and help a bit, but it won't solve the root of the problem.

Could you move the rig forward, and increase the bowsprit length and/or move the centre/dagger board aft.  Or make the boat bigger (or even the jib) Wink

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Peter
Ex Cont 707
Ex Laser 189635
DY 59


Posted By: Reuben T
Date Posted: 06 May 13 at 9:31pm
Thanks, I have some spare ply that I could make a new daggerboard that is angled back to move the CLR if that would help. The rudder gantry sounds like a fairly simple job compared to the major surgery that would be required for a new bowsprit so I think I will try that first. Thanks


Posted By: maxibuddah
Date Posted: 06 May 13 at 9:38pm
thats brilliant, best use of a Laser 2 rig I've ever seen - this kind of thing might catch on a bit

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Everything I say is my opinion, honest


Posted By: 2547
Date Posted: 06 May 13 at 9:42pm
Good work there. Go for the longest gantry you can hash up. Start big and then you can reduce if needed. 


Posted By: Reuben T
Date Posted: 06 May 13 at 9:45pm
Its definitely very good for honing your balance and trim skills, also it makes you realise the forces the rig actually exerts, that all other boats are stable enough for you not to feel. And if you want to improve your swimming then this is definitely the boat for youWink


Posted By: sargesail
Date Posted: 06 May 13 at 9:55pm
Before you go for major surgery - is your rudder as balanced as it could be?  All too often I hear people talking about weather helm , when what they have is a boat that isn'y being sailed flat and a rudder with a bit of aft rake in it.


Posted By: JimC
Date Posted: 06 May 13 at 11:26pm
The thing about weather helm and all that is that most of the older books at least are completely wrong about it, because they take the view that the boat should just use the centreboard as CLR, and the rudder should be neutral. Not so. A decent setup on a dinghy balances the sideload between the two foils.

Your daggerboard looks a good way forward to me, but its not outside the range I've seen work, but the big thing of course is that the rudder is also a long way forward. I concur with Rupert that a rudder gantry will be a good thing and absolutely the first thing to try, but not only for balance, but also because you'll be able to have much more room in the boat and it will have much better ergonomics, which in itself will help.

But also I think a big thing is that you have a very wedge shaped short little boat there, and I reckon she will hull steer like crazy when not absolutely bolt upright... I find it hard to believe in the bow digging in very much per se and affecting weather helm, but I do believe the hull is going to steer the boat a lot and there's nothing you can do about that...

So yeah, get as long a rudder gantry as you can on there. If you can get the two foils in the same position relative to the rig they are in the Laser 2 that will be a pretty good place to start. Also with the foils farther apart everything will be a lot less critical, most notably the steering.


Posted By: tick
Date Posted: 07 May 13 at 7:18am
I seem to remember a few years ago on here there was much talk of a six foot skiff. There were lots of drawings but did anyone ever make one? The rudder gantry seems a  good idea to me but how about a rudder skeg?


Posted By: RS400atC
Date Posted: 07 May 13 at 8:05am
Also don't forget trim and fullness of the two sails.
Flatttening the main a bit and sheeting the jib a little more inboard and fuller (i.e. fairlead forwards) might make a significant difference.
Agree with JimC.
Go for  a big rudder with a lot of balance, i.e. 10% of its area forward of the pintle axis.
 
It looks barking, well done!


Posted By: tick
Date Posted: 07 May 13 at 8:59am
" i.e. 10% of its area forward of the pintle axis". If that 10% was fixed, as I suggested a skeg, and perhaps bigger would that not do the same thing? Would not some rudder forward of the axis make it more twitchy? Oh, and gantry of course..........mind you all this will change when the foils go on!


Posted By: JimC
Date Posted: 07 May 13 at 9:38am
A skeg would probably do odd things to the way the rudder blade takes up side force, and any effects would be tiny compared to moving the rudder back... and you'd need to build a new rudder blade to get half reasonable interaction between the skeg and the blade, plus if its going to take up any sensible amount of side load you've got structural considerations...

[And... he realised later after reading a subsequent post, what about launching and retrieval!]


Posted By: RS400atC
Date Posted: 07 May 13 at 10:53am
Originally posted by tick

" i.e. 10% of its area forward of the pintle axis". If that 10% was fixed, as I suggested a skeg, and perhaps bigger would that not do the same thing? Would not some rudder forward of the axis make it more twitchy? Oh, and gantry of course..........mind you all this will change when the foils go on!
Skeg?
That's a truly horrible idea for a dinghy.
The point is to allow a large rudder area, with small tiller forces when the rudder is providing lift against the rig forces.
It should not be twitchy, or at least no more so than is implicit in a comically short boat...
A skeg will be shoved sidewise through the water whenever the boat turns through a small radius, it's just gross don't do it!
 
In my mind, a gantry is sort of cheating, why not make the hull that long if that's where you want the rudder....?


Posted By: tick
Date Posted: 07 May 13 at 12:35pm
I bow before the greater knowledge of my compatriots but if a skeg on gantry made the boat think it was longer where is the harm of putting a rudder on the back of that, like a rudder on a transom? The rudder could always be deeper than the skeg?

As for launching......it is a laudably eccentric boat anyway. Carrying it into the water will not get you any wetter than you are about to get anyway!


Posted By: Rupert
Date Posted: 07 May 13 at 2:25pm
Originally posted by RS400atC


 
In my mind, a gantry is sort of cheating, why not make the hull that long if that's where you want the rudder....?


I kind of agree, except that exactly the same could be said about the bowsprit, couldn't it? Or even the boom sticking out over the transom? Each makes the overall length far longer than the hull length.

Moths 14s and Cherubs have kind of blown the hull length V's gantry thing out of the water now, anyway, haven't they?


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Firefly 2324, Puffin 229, Minisail 3446 Mirror 70686


Posted By: Jack Sparrow
Date Posted: 07 May 13 at 2:42pm
I'd just cut the back of the mainsail off. That'll shift the CofE forward.

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http://www.uk3-7class.org/index.html" rel="nofollow - Farr 3.7 Class Website
https://www.facebook.com/groups/1092602470772759/" rel="nofollow - Farr 3.7 Building - Facebook Group


Posted By: RS400atC
Date Posted: 07 May 13 at 2:45pm
Moths etc are trying to be much longer boats than their rules allow.


Posted By: Rupert
Date Posted: 07 May 13 at 2:56pm
Moths etc could have decided, when people started putting gantrys, bowsprit supports etc on that the overall length included such things, and effectively banned them, but they didn't. In the case of this boat, there are no rules. I suspect the hull length is decided by the length of a piece of ply.

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Firefly 2324, Puffin 229, Minisail 3446 Mirror 70686


Posted By: Reuben T
Date Posted: 07 May 13 at 4:52pm
Originally posted by Rupert

Moths etc could have decided, when people started putting gantrys, bowsprit supports etc on that the overall length included such things, and effectively banned them, but they didn't. In the case of this boat, there are no rules. I suspect the hull length is decided by the length of a piece of ply.

you are correct about the size being based on a sheet of ply. We probably wouldn't have made the boat much bigger if this hadn't been a factor anyway because we created it to be a challenging boat to sail, But we want it to be sailable so I think we need a gantry to achieve that. For those of you who are of the opinion that a gantry is cheating, for a racing class I would be inclined to agree however in this case the hull length isn't altered so the sailing characteristics should still be those of the stupidly small origional boat.


Posted By: Jack Sparrow
Date Posted: 07 May 13 at 5:59pm


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Posted By: Reuben T
Date Posted: 07 May 13 at 6:19pm
That would probably solve the weather helm problem, but it would render the sails useless for the laser 2 which I have borrowed it from, and stop me selling it afterwards. Also I might need to upgrade my kicker to keep a reasonable sail shape and the budget for this project is already rather higher than anticipated. Thanks for the diagrams anyway, it gives me an idea of how far the CLR and CofE need to move.



Posted By: Jack Sparrow
Date Posted: 07 May 13 at 7:59pm


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Posted By: JimC
Date Posted: 07 May 13 at 9:57pm
Originally posted by Reuben T

Thanks for the diagrams anyway, it gives me an idea of how far the CLR and CofE need to move.

Fortunately its not too critical. As long as the CLR is somewhere between the two foils it won't make that much difference... Ideally the rudder would be as far back as an LII one, but I reckon if you make the gantry the same length as the tiller it won't be too far out. Fortunately you have the wings as a point to get a really good angle for the sideways loads...


Posted By: Jack Sparrow
Date Posted: 08 May 13 at 11:00am


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Posted By: MerlinMags
Date Posted: 08 May 13 at 11:00am
Ah, this is beautiful! It is what I have always wanted to do.
RESPECT!


Posted By: alstorer
Date Posted: 08 May 13 at 11:04am
I reckon this bad boy needs a magazine write up.

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-_
Al


Posted By: tick
Date Posted: 08 May 13 at 11:10am
Surely someone has some old L2 sails they can donate for this project? I used to have but I gave them away years ago.


Posted By: JimC
Date Posted: 08 May 13 at 11:24am
Rather destroy the point to make it too sensible folks... part of the charm to have the rig overhanging the hull in every direction.



Posted By: 2547
Date Posted: 08 May 13 at 11:41am
Originally posted by JimC

Rather destroy the point to make it too sensible folks... part of the charm to have the rig overhanging the hull in every direction.


+1


Posted By: maxibuddah
Date Posted: 08 May 13 at 11:43am
It looks a little like those old barges with the huge bowsprit and overhanging booms, just a bit more mental

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Everything I say is my opinion, honest


Posted By: Rupert
Date Posted: 08 May 13 at 1:42pm
Agree about the mad overhangs - they make the whole thing worthwhile. Love to see some video footage when you get it tracking better.


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Firefly 2324, Puffin 229, Minisail 3446 Mirror 70686


Posted By: PeterG
Date Posted: 08 May 13 at 1:47pm
Surely someone has some old L2 sails they can donate for this project?

If you mean so they can be cut down, doesn't that undermine the whole point of the exercise? To make the smallest boat you can fit a Laser II rig on?


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Peter
Ex Cont 707
Ex Laser 189635
DY 59


Posted By: fdsailor
Date Posted: 08 May 13 at 5:21pm
You could grab a binned sail from a Melges or something and cut it down to size, maybe with the centre of area a bit further forward as has been suggested. There is a bloke in Sweden who built himself sails out of white laminate polytarp that looked pretty good - 20 quid plus some decent tape and eyelets etc to put it all together. Wicked project!



Posted By: Reuben T
Date Posted: 08 May 13 at 8:56pm
Originally posted by Rupert

Love to see some video footage when you get it tracking better.

 I can't sail it this coming weekend but the week after I should be able to get some videos of it. Does anyone know if there is a way of uploading video without it being on youtube?


Posted By: Xpletive
Date Posted: 08 May 13 at 9:57pm
Sorry but this is not innovative. I did the exact opposite of this a few years ago.....put a Laser rig on the QE11. No appreciable increase in performance whatsoever. What was worse, I forgot it when I got off....





Posted By: Reuben T
Date Posted: 08 May 13 at 10:06pm
I dont recall anyone claiming this was innovative, and it isn't intended to give increased performance. The aim of this project was to have a laugh and to end up with a boat that would be a challenge to sail, possibly improve our reactions and general sailing. I appreciate that it isn't everyones cup of tea, if it isn't yours then just ignore it rather than commenting.


Posted By: craiggo
Date Posted: 08 May 13 at 10:15pm
Originally posted by Reuben T

I dont recall anyone claiming this was innovative, and it isn't intended to give increased performance. The aim of this project was to have a laugh and to end up with a boat that would be a challenge to sail, possibly improve our reactions and general sailing. I appreciate that it isn't everyones cup of tea, if it isn't yours then just ignore it rather than commenting.




Posted By: Xpletive
Date Posted: 08 May 13 at 10:57pm
Originally posted by Reuben T

The aim of this project was to have a laugh.......
Mind the sides don't split.


Posted By: alstorer
Date Posted: 09 May 13 at 7:05am
blimey, who pi55ed in your conrflakes?

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-_
Al


Posted By: hollandsd
Date Posted: 09 May 13 at 7:49am
I think it was supposed to be a joke Al......side splittingly funny..its a laugh.....?

Dan


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Laser 184084
Tasar 3501
RS600 698
RS600 782


Posted By: iGRF
Date Posted: 09 May 13 at 9:14am
Originally posted by Reuben T

I dont recall anyone claiming this was innovative, and it isn't intended to give increased performance. The aim of this project was to have a laugh and to end up with a boat that would be a challenge to sail, possibly improve our reactions and general sailing. I appreciate that it isn't everyones cup of tea, if it isn't yours then just ignore it rather than commenting.


Don't get yourself wound up chap, you're the one enjoying something different they aint, it winds them up, frustration and probably sexual frustration with that Xpletitive lass, she hasn't had it in a while

Oh and well done, project after my own heart.

We should start the Frankenboat class association, the rules are.. There are no rules..


Posted By: pondmonkey
Date Posted: 09 May 13 at 9:20am
yep- well done for having a go.  You've got a great attitude with it- and that counts for so much.

Just keeping posting pics and vids, it is a laugh so thank you for sharing.


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Posted By: tgruitt
Date Posted: 09 May 13 at 10:21am
I can't wait to see more pics and videos of this new creation! There must be a way of getting it in the magazine somehow..... Wink


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Needs to sail more...


Posted By: pondmonkey
Date Posted: 09 May 13 at 10:26am
Originally posted by iGRF

We should start the Frankenboat class association, the rules are.. There are no rules..

you would have no need for that polysyllabic word... 'association' then would you? Wink


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Posted By: tick
Date Posted: 09 May 13 at 10:36am
I do have a Byte hull, a Graduate mast, a set of Tasar Dacrons, loads of glass windsurfer masts and a local scrapyard. However I also have grass, peeling paint, cracking concrete and dandylions........oh, and a vicious wife.



Posted By: Rupert
Date Posted: 09 May 13 at 10:45am
Originally posted by pondmonkey

Originally posted by iGRF

We should start the Frankenboat class association, the rules are.. There are no rules..

you would have no need for that polysyllabic word... 'association' then would you? Wink


A place where Frankenboat creators can go for therapy and to compare monsters - CA doesn't seem quite right, but I can't think of something snappy and to the point. Anything from this boat to a windsurfer rig powered Wayfarer...


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Firefly 2324, Puffin 229, Minisail 3446 Mirror 70686


Posted By: fab100
Date Posted: 09 May 13 at 11:02am
Originally posted by iGRF

 We should start the Frankenboat class association, the rules are.. There are no rules..

But what is the objective/measure of success. A race? Getting to the start line in one piece? Highest ratio of sail area to waterline or overall length? Wackiest concept? Or just to have fun mucking about with and in boats?

Grumph, it's time you patched up the v-twin and fitted retractable, powered wheels to aid launching and recovery in your shore dump and a mast-top float that inflates only when you pull the rip-cord (rather like offshore life-jackets) and stops inversion. Professor Pat Pending from the Wacky Races would have sorted these ages ago


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http://clubsailor.co.uk/wp/club-sailor-from-back-to-front/" rel="nofollow - Great book for Club Sailors here


Posted By: JimC
Date Posted: 09 May 13 at 11:21am
Originally posted by fab100

Or just to have fun mucking about with and in boats?

Ultimately isn't that the only thing that really counts for the vast majority of us? There are just different ways of achieving that aim.


Posted By: Rupert
Date Posted: 09 May 13 at 11:29am
Just getting the project from inside one's head to actually sailing would be the main aim - with fun to be had both from the doing and the sharing. Not sure how a meaningful race could be run, and not sure the aim would always be to cram lots of sail on a tiny boat - there are as many ideas out there as people to think them.

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Firefly 2324, Puffin 229, Minisail 3446 Mirror 70686


Posted By: pondmonkey
Date Posted: 09 May 13 at 11:48am
what I like about the OPs opening gambit is there is absolutely no mention of racing, rules, class associations, portsmouth yardstick numbers or any of the other b**locks usually attributed to frankenboat threads....

... it's exactly as Jim & Clive say, 'mucking about on the water'.  That's quite refreshing to read, well done to that man Rueben!


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Posted By: iGRF
Date Posted: 09 May 13 at 12:18pm
I only used the term Class Association because as always I treat this place as if I were a teacher in a special needs class and I know you understand the term.

Were it me, we'd be FOG

The Frankenboat Owners Group!

we should at the very least start a facebook page


Posted By: Chris 249
Date Posted: 09 May 13 at 12:23pm
It's a fantastic boat, IMHO.

On the weekend I'm giving my kid's old Flying Ant (10'6" baby Cherub) to my daughter's boyfriend, who was going to make it into a Frankenboat 10'6" skiff with old Tasar sails. They are also in the process of buying a Cherub so we may end up with an Ant with a Cherub rig.

Down here where there are lots of old Ants we could have a great class with one rule - it has to use an old Ant hull. Low cost, high fun, and very silly.... what could be better!

And many congrats, Rueben and co, for doing what many of us (like me) have been talking about.Thumbs UpBeerClap




Posted By: pondmonkey
Date Posted: 09 May 13 at 12:30pm
Originally posted by iGRF

Were it me, we'd be FOG

any how very appropriate, given that most Frankenboat Owners excel at the creation of vapour.... 
OP graciously excluded.



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Posted By: fab100
Date Posted: 09 May 13 at 12:35pm
Originally posted by iGRF

I treat this place as if I were a teacher in a special needs class  

How strange grumph, I suspect many of us see you as the 3 year-old fixated on Why... is the sky blue? (when red would be a better colour) ... does the sun rise in the east and set in the west? (when the other way would be a nice change occasionally) is water wet when a liquid? ...can't we reinvent the wheel anew each day? etc etc then responds to every explanation with the statement that the universe would be better their way than the way it actually is.

Anyway, back to the thread. I love this project but fear that either the rig is going to have to move forwards or the daggerboard move back a way, gantry or no. Of course to be truly, radically different, you could cant the rig miles forwards; like this SU-47. Might set a new trend!





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http://clubsailor.co.uk/wp/club-sailor-from-back-to-front/" rel="nofollow - Great book for Club Sailors here


Posted By: iGRF
Date Posted: 09 May 13 at 2:56pm
Originally posted by fab100



How strange grumph,


I suspect there's quite a lot in my universe that you might find strange and have difficulty coping with...


Posted By: fab100
Date Posted: 09 May 13 at 3:27pm
Originally posted by iGRF

Originally posted by fab100



How strange grumph,


I suspect there's quite a lot in my universe that you might find strange and have difficulty coping with...

Yeah, we agree on something.  

It is more than well documented in the GRF wiki thread, where we have established that the actual rules of physics do not apply, that this is the case.


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http://clubsailor.co.uk/wp/club-sailor-from-back-to-front/" rel="nofollow - Great book for Club Sailors here


Posted By: tick
Date Posted: 09 May 13 at 5:48pm
One of my sons, when he was very young, was keen on magic. We bought him a set of magic tricks for Christmas. He excitedly opened the box and I explained the contents. He burst into tears, " I thought there was real magic, not tricks " he said. I am glad to say that some of us never looked in the box.


Posted By: iGRF
Date Posted: 09 May 13 at 8:03pm
Originally posted by fab100


Yeah, we agree on something.  
It is more than well documented in the GRF wiki thread, where we have established that the actual rules of physics do not apply, that this is the case.


I'll tell you a little tale about me and the rules of physics, when I was at school, we were told light was composed of physical particles that travelled in straight lines. My logical mind questioned this, how could that be i thought, if it were true then there would be divergence from a single point source and gaps would appear and I pretty much had to come to my own understanding of light in that it must be a wave source rather like waves emanating from a pebble thrown in.
So from that day to this I always question anything and everything I'm told. There is only one maxim about rules, wether they be man made or the rules of physics, they are for the obedience of fools and the guidance of wiser men.


Posted By: 2547
Date Posted: 09 May 13 at 9:14pm
Originally posted by iGRF

Originally posted by fab100


Yeah, we agree on something.  
It is more than well documented in the GRF wiki thread, where we have established that the actual rules of physics do not apply, that this is the case.


I'll tell you a little tale about me and the rules of physics, when I was at school, we were told light was composed of physical particles that travelled in straight lines. My logical mind questioned this, how could that be i thought, if it were true then there would be divergence from a single point source and gaps would appear and I pretty much had to come to my own understanding of light in that it must be a wave source rather like waves emanating from a pebble thrown in.
So from that day to this I always question anything and everything I'm told. There is only one maxim about rules, wether they be man made or the rules of physics, they are for the obedience of fools and the guidance of wiser men.

Clearly at your "special school" they didn't bother you with the full facts, just what they thought you'd cope with ....

As for your final comment, the trouble with fools is they consider themselves to be wise in the face of all the evidence ... anyone for a V Twin?


Posted By: pondmonkey
Date Posted: 09 May 13 at 9:28pm
Far be it from me to suggest keeping sh*t on topic, but does this thread need this... isn't that what the wikiGRF and V-Twin threads are all about?

Let's give the young lads a break, stop stoking embers of past flame wars not associated with their goals and ambitions and offer a few more of the following...   simply because, well, they did it- and actually achieved what they set out to do.  

ClapThumbs UpStar ClapThumbs UpStar ClapThumbs UpStar ClapThumbs UpStar ClapThumbs UpStar ClapThumbs UpStar ClapThumbs UpStarClapThumbs UpStarClapThumbs UpStarClapThumbs UpStarClapThumbs UpStarClapThumbs UpStarClapThumbs UpStarClapThumbs UpStarClapThumbs UpStarClapThumbs UpStarClapThumbs UpStarClapThumbs UpStarClapThumbs UpStarClapThumbs UpStarClapThumbs UpStarClapThumbs UpStarClapThumbs UpStarClapThumbs UpStarClapThumbs UpStarClapThumbs UpStarClapThumbs UpStarClapThumbs UpStarClapThumbs UpStarClapThumbs UpStarClapThumbs UpStarClapThumbs UpStarClapThumbs UpStarClapThumbs UpStar


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Posted By: craiggo
Date Posted: 09 May 13 at 9:39pm
The Su-47s forward swept wings have a centre of effort in exactly the same place as if it had conventional wings. The rationale for the forward swept wings is that they massively improve the manoevrability of the aircraft, however the side effect is an aeroelasticly divergent structure. Modern materials enable you to tailor the structure to prevent the divergency but it still adds considerable weight to the structure. NASA played around with a forward swept wing on the X-29.

I cant really think why it would be desirable to have a fwd swept rig on a boat especially given that the mast foot would end up behind the daggerboard!
We have however been sweeping centreboards slighty forwards for years, pushing the limits of aeroelastic divergence.

And finally the last thing to consider is that these aircraft are inherently unstable and can only be flown because the computer makes minute corrections in fraction of a second. I dont think we really want to see sail-by-wire systems in dinghies do we?

On the subject of fly-by-wire, I made the prediction back in about 1986 that in the future cars would have drive by wire systems instead of throttle cables and steering racks. All the adults I told thought I was being stupid, but alas Mercedes and BMW have been using electronic throttles for years now, and have lately along with Nissan I believe started using electronic steering systems with no physical link between the wheel and the steering actuation!


Posted By: Rupert
Date Posted: 09 May 13 at 10:10pm
Back when GRF was a lad he predicted that carriages would one day be propelled by tiny explosions, rather thn pulled by horses, but all the adults thought he was being stupid...

Personally, I quite like the idea of sail by wire - no silly mainsheets or tillers - can we also just wear a special helmet and think everything and have it happen?


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Firefly 2324, Puffin 229, Minisail 3446 Mirror 70686


Posted By: pondmonkey
Date Posted: 09 May 13 at 10:45pm
can't we go wireless- sit in a nice country pub beer garden and toss RC Lasers Kirby Torches around the village pond.  I'd save a fortune on aquafleeces and hikers.

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Posted By: iGRF
Date Posted: 10 May 13 at 8:49am
Originally posted by 2547


anyone for a V Twin?


Rigged with an International 14 set up?


It's sat there at the dock, would you or would you not want to take it out for a spin?

And would or would it not be an absolute fun blast?

That's your answer.

And if you answered no then wtf you even doing on this thread?



Posted By: ifoxwell
Date Posted: 10 May 13 at 9:56am
Originally posted by craiggo

 I dont think we really want to see sail-by-wire systems in dinghies do we?

It can only be a matter of time before its standard fit on Moths cant it. I dont sail one so could be talking out of my ..... but I would have thought that computer controlled flaps to maintain pitch and height in any sea state and at any speed would add enormously to the speed and control ability of the craft. And arguably could end up bringing down costs in some respects. Rather than different foils and wand mechanisms to cater for differing conditions, you could just reprogram your system?

Ahhh

Sorry

I may be dragging this off topic

Ian


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RS300


Posted By: tick
Date Posted: 10 May 13 at 10:34am
You could have parking sensors recording distance to mark. bleep, bleep, bleep.....you have water!



Posted By: Reuben T
Date Posted: 11 May 13 at 11:49am
The new dagerboard I'm making to try to move the CLR back a bit, yes my shed does need a bit of a clear out.Embarrassed                                           


Posted By: PeterG
Date Posted: 11 May 13 at 12:57pm
Careful, you may start a shark alert if you turtle itWink




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Peter
Ex Cont 707
Ex Laser 189635
DY 59


Posted By: andymck
Date Posted: 11 May 13 at 8:24pm
I think Roger Angell already has a working fly by wire system on a foiling moth. I understood it was a test bed for a bigger craft. It was of course not class legal, but was told it worked very well. I believe it was gyroscope based.

You would need to speak to him to confirm though.

Andy

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Andy Mck


Posted By: bavarianmidget
Date Posted: 12 May 13 at 2:31pm
I would try a rudder gantry.
The 6ft skiff thread in this forum a couple of years ago planted a virus into my brain that persisted for years until I created this (hull only 6ft long!Shocked):

http:// http://www.youtube.com/watch?v=bQQ2hSQCAYY" rel="nofollow - www.youtube.com/watch?v=bQQ2hSQCAYY

The rudder that  has a little horizontal foil at its tip is attached to a >2ft gantry and the creation sails relatively balanced (I admit having it only sailed once last fall and since I don't have a significant sailing background I might be not the person to judge). I can not imagine sailing it without the gantry that probably makes it less nervous.
The bow of my creation is however not sharp, which is most probably impossible with a 6ft hull.


Posted By: craiggo
Date Posted: 12 May 13 at 3:06pm
Originally posted by bavarianmidget

I would try a rudder gantry. The 6ft skiff thread in this forum a couple of years ago planted a virus into my brain that persisted for years until I created this (hull only 6ft long!Shocked): http:// http://www.youtube.com/watch?v=bQQ2hSQCAYY" rel="nofollow - www.youtube.com/watch?v=bQQ2hSQCAYY The rudder that  has a little horizontal foil at its tip is attached to a >2ft gantry and the creation sails relatively balanced (I admit having it only sailed once last fall and since I don't have a significant sailing background I might be not the person to judge). I can not imagine sailing it without the gantry that probably makes it less nervous.The bow of my creation is however not sharp, which is most probably impossible with a 6ft hull.



Posted By: PeterG
Date Posted: 12 May 13 at 6:06pm
I'm not sure about this talk of a gantry. The boat is a massive 7ft long to start with, and you want to make it longer!
Hugo Viheln puts you to shame Wink. His boat was only 5'4" long, no gantries or bowsprits and he crossed the Atlantic in it - now that is class (as well as insanity!)




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Peter
Ex Cont 707
Ex Laser 189635
DY 59


Posted By: Rupert
Date Posted: 12 May 13 at 7:57pm
But that is a yacht, not a dinghy!

Love the video of the little 6 foot boat - well done that man.


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Firefly 2324, Puffin 229, Minisail 3446 Mirror 70686


Posted By: tick
Date Posted: 12 May 13 at 9:12pm
I was on rescue yesterday for a Derbyshire Youth Sailing event. I am still recovering from the hypothermia. The day was won by a very good 13? year old in an oppie. The oppie skipped over the waves and only went well when it was flat....which it usually was. I thought putting a big rig on one of them would not work. Too flat.


Posted By: Reuben T
Date Posted: 04 Jun 13 at 6:27pm

Finally managed to get some video together, sorry about the shaking, the cameraman has just been for a sail/swim  http://www.youtube.com/watch?v=QMH2X5SUGNk" rel="nofollow - http://www.youtube.com/watch?v=QMH2X5SUGNk


Posted By: maxibuddah
Date Posted: 04 Jun 13 at 6:39pm
that looks brilliant fun. You looked to be having far more fun that those people in their Solo's. Love the 1960's cine effect as well, especially the dodgy camera work shaking all about.

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Everything I say is my opinion, honest


Posted By: AlexM
Date Posted: 04 Jun 13 at 6:43pm
Nice little boat, looks great fun.
Was the cameraman filming on a bouncy castle ? ;)

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Posted By: Jack Sparrow
Date Posted: 04 Jun 13 at 6:46pm
Originally posted by Reuben T

Finally managed to get some video together, sorry about the shaking, the cameraman has just been for a sail/swim  http://www.youtube.com/watch?v=QMH2X5SUGNk" rel="nofollow - http://www.youtube.com/watch?v=QMH2X5SUGNk


BRILLIANT!!!!

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http://www.uk3-7class.org/index.html" rel="nofollow - Farr 3.7 Class Website
https://www.facebook.com/groups/1092602470772759/" rel="nofollow - Farr 3.7 Building - Facebook Group


Posted By: Pierre
Date Posted: 04 Jun 13 at 7:41pm
Originally posted by Jack Sparrow

Originally posted by Reuben T

Finally managed to get some video together, sorry about the shaking, the cameraman has just been for a sail/swim  http://www.youtube.com/watch?v=QMH2X5SUGNk" rel="nofollow - http://www.youtube.com/watch?v=QMH2X5SUGNk


BRILLIANT!!!!

Absolutely. What a hoot. It looks like great fun.
Well done that man Clap


Posted By: tick
Date Posted: 04 Jun 13 at 7:59pm
What happens when he pops the sillymetric?



Posted By: Rupert
Date Posted: 04 Jun 13 at 9:40pm
Reuben will be too young to remember the cartoon Rhubarb and Custard, but the shaky camerawork remindedme of that.

The boat looks superb - loved the reaction of the Byte sailor as you went past, and 10/10 for the dismount at the end...


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Firefly 2324, Puffin 229, Minisail 3446 Mirror 70686


Posted By: atefooterz
Date Posted: 26 Jun 13 at 1:51am
Hiya (1st post) I was wondering how the weather helm issue was going and if the new rudder helped it ? I can only talk from experiance with a few 8foot versions i have built/ sailed and yes the is extreme weather helm and moving mast rake & step position does not do all that much. My first skiff had the jib at 1100mm from stem with centre mast at 800mm behind stem. Later versions have seen the rudder move further outwards to be approx a3m skiff now!

Someting to consider however is in light 1-8kts of breeze how extreme the apparent wind does move and the nasty weather helm actually becomes a blessing and capsize saver, when wind shifts or drops suddenly! As you go uprange then usually body weight position, starts to ballance out the helm. ( a bit)

Great to see 20+ years later folks are still prepared to build "silly skiffs" that are rather cheap in cost but allow so much experimentation with the bonus that a few years sailing one does translate into superior reaction times and apparent wind sailing prowess!


P.S.  Foils next ?


Posted By: fleaberto
Date Posted: 02 Jul 13 at 1:10pm
Clap Awesome, just awesome...... Mental, but awesome.
How long is the queue to have a go? Big smile

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Lightning368 'All the Gear' (409), Lightning368 'Sprite' (101), Laser (big number) 'Yellow Jack', RS Vareo (432)'The Golden Rays'


Posted By: Reuben T
Date Posted: 02 Jul 13 at 1:35pm
Originally posted by atefooterz

Hiya (1st post) I was wondering how the weather helm issue was going and if the new rudder helped it ? I can only talk from experiance with a few 8foot versions i have built/ sailed and yes the is extreme weather helm and moving mast rake & step position does not do all that much. My first skiff had the jib at 1100mm from stem with centre mast at 800mm behind stem. Later versions have seen the rudder move further outwards to be approx a3m skiff now!

The rudder we are using is still from a laser 2 the new curved daggerboard and raking the mast slightly more forwards had practically neutralised the weather helm and the boat is actually pretty well mannered now as long as she maintains forward momentum Smile

Do you have ay pictures of the ones you built?



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