Building new class 5

wow I certinaly opened a can of wormes on this one
Cheers
AUS320

Talk to Paul, Bill Finch and others about this one!
What has FISLY done for the sport in Oz could always be countered with "what has the sport in Aus done for FISLY".
Take this as it's meant, very tongue in cheek.
In reality though, any organisation is only as good as those who participate in the organisation. It's very easy to sit back and criticise, but if you give no help to make it better, you don't really have a hell of a lot of credibility.
All the members of the hierarchy are volunteers who do sail now or have sailed in the past, trying to assist the sport however they can.
I also believe that when both our countries had active participants at committee level a lot was achieved to bridge gaps. That was in the past, as those participants moved on, and were not replaced.
Is it a good thing to have 2 separate and parallel rules? Personally I don't think so. When Pacrim was first established in 1986, trying to get the 3 countiries involved to agree on a common set of rules was a nightmare. When a very slightly modified FISLY rule set was adopted, a lot of difficulties disappeared

Hi Hiko.
I have had no problems with frame twist, The yacht handles well in all the conditions that I have encounted so far. The only area that I am still having problems is standing starts(have to be seated in the yacht) the club 88s can push with there hands to get away in low wind conditions but I can not reach the ground in my yacht. Thems the breaks, and I will have to live with that.
Cheers
AUS230

thanks AUS 230 Yes it did seem to me that it must have been a very light chassis to do that Standing starts we all have extra hand steering extensions and push start and jump in dont you do that?
A good thing about the swept back axles as they dont get in the way

Gosh I find that amazing
Many times we have driven a few hours to a meeting and found the sand a bit soft and the wind light
Under those rules we would have to pack up and go home and miss out on a great day
Sometimes but not often we have to push during a race
You will have to carry a push pole! Or getting really ridiculous how about an
anchor that you can throw ahead and pull on ?!!!!
Goes off shaking his head and muttering into his beard

Aus 230, please do not take my above as a criticism of what you have done, just an observation.
When the tall wheels were intro'd in Europe their major benefit was in wet stuff, tyres were a major to deal with. I left before it was resolved, if it has been. (To finish first, first you have to finish)
A theory that the Seagull team played with, and hence the adjustable camber, was that windier needed more camber, less wind less. Largely to keep the tyres on the rims.
In the Glen team it was in windy the axis of the wheels points at the Cof E of the sail, so minimising bearing loads, tyre distortion, and side loads on the wheels. In not a lot of breeze the wheel alignment just gets too hard. And then there is the "precession of a rotating mass" as well as a cambered wheel is trying to follow a conocal course.
Bugger, too much theory again, just go sail the "pigging thing"
Front weight was always as little as you can to retain a semblance of control. My YOTT would steer through a tack turn quite happily with the front wheel bouncing up to 500mm in the air, and perfectly turning each time it touched down. Very un-nerving but it worked. The major reason for light.... when you have to crash across a river the front will loft and you won't crash into the opposite river bank!

Finally got a sail of the" beast of bermingham " myself this weekend.
rather impressed to be honest. The yacht is sailing well despite the need for some more chassis and sail tuning Vics first set of big wheels are showing the strain of a long summer at walyungup and look a bit diseased.
When he gets the new set running next season , watch out. I was interested in the twisting chassis observation Hiko, I found that I needed to reallywork on weight transfer fore and aft when cornering. The yacht displayed similar front wheel shudder to the kiwi yachts that were here in 06.
big problem is that the salt is so different to walyungups gravel, so it might not be so noticable down there.

Landyacht that front wheel Kiwi yacht shudder thing What do you think it is ?
I thought I had fixed it by putting more radius on the front tyre and shifting my weight [considerable]! forward in the turns but it revisited me again on the weekend
Most of the other yachts here seem to do it to some degree as you have noted
It must be unusual for you to mention it
I think my yacht does it more than most and certainly slows my turning ability
I think the sand was finer and softer than normal on the weekend plenty of wind though
I have another set of unsprung forks that I havent tried with the radiused tyre
will try that maybe

Thanks for the comment Kiwi307
The other guys here mostly have suspension also and they pivot it just behind the
kingpin My idea of doing it the way I did was to stop the effect of slackening and tightening of the steering wires as the front wheel moved up and down as theirs do The steering I thought is quite twitchy enough without wires going slack and tight as well
Maybe I got off down the wrong track
The original design had the suspension back at the mast step using a rubber squash ball which wouldnt have effected the steering much but I had trouble
making it work and gave it away early in favour of the present setup
Perhaps I could revisit that or just go rigid and give that a try although it seems that Aus 230 has the rigid setup and has similar wheel judder
Seems strange to me that this is peculiar to the OTT style of chassis or is it?
We all run the tyres at around 30 psi front and rear here I dont know if that is a factor

Pauls right, at walyungup the yacht does not shudder in the corners there is a lot of sidways movenent on the gravel surface which allows me to hit the corners under full power and the back of the yacht develops a nice slide around the corners. There is a lot more tration on the salt and the tyres do not slide easely hence some vibration. The wheels are not balanced very well at the moment due to running repairs to keep them going to the end of the seasion. I did not notice the out of balance at walyungup as the surface is a lot roughfer than Lefroy. (I love the surface at walyungup now that I have past the terrified stage)
Cheers
AUS230

The promo minimum front frnt weight is 10kg thich felt was way too much. we had to add weights to get up to the minimum spec > the seagull promos had a bolting posn for you to fit your personal lead weight( of course!!!!!!)
Then you added masses of sand to the special big front of the seat pod.
All this to get upwind , then downwind you had to have a really well built front fork mounted on bearings just to steer

gidday,
great looking weekend at the Lake, the photies say it all, 10 outa 10 to the camera person reading the thread i come to wonder what if, your front wheel ran in a modified motor bike rear suspension, what is the correct terminology, Stiff arm ??? recon that would weed out a fair amount of problems I,m all for small simple suspensions on serious wind assisted platforms, i brake no bones about that cheers...... joe

I am desparately trying to remember what the wheel alignment for my YOTT was. Certainly was not parallel unloaded. With the delta axles there are some complex changes as rig load comes on.
Srtaight axles were easy,, but the twisting loads changes that. I think Paul may be right that a wee bit of toe out, but I am not totally sure. I do remember that one of the delta axle yachts I sailed had to run what seemed like shocking toe in unloaded. If you can find a really slippery surface, or better a pair of wheel alignment turntables, the load the yacht up, say 120kg to add a bit of "bump load" then sheet in and out and observe you may learn???

I have no idea what you're talking about joe

This is the Class5 I am presently sailing. I am happy for anyone to copy.

Currently running on 26" wheels. I still have the 19" wheels if I ever get to another Pacrim event. The pod came off the Colin Palmer Class3 mould. I built the nose cone for it.