Kite Buggy trials

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responderman
responderman
82 posts
82 posts
29 Aug 2009 7:22am
Hello again,
I started this post as my Hello post was going off topic, and now I have tails to tell of fun with a kite buggy land yacht. I am away at the east coast at the moment having some fun with an old sail and a crap kite buggy. I had a few days going up and down the beach and so problems were expected and some were not. The sail is as even I thought, to big and to old. It is like driving a tractor down the beach but also the buggy is too narrow even with my weight in it. So I will start again building one of the mini buggies that seem so popular on this forum. I have worked out that it will take more to alter my buggy than to start a fresh, so here is to a new buggy and it seems normal to show progress as it happens. I also have found a source of a better sail that's not so big, so.I hope to report back with more news. The times I did have on the beach were great and spent a lot of time up on two wheels some of it was not supposed to happen :)
All the best
Jay
cisco
cisco
QLD
12365 posts
QLD, 12365 posts
29 Aug 2009 10:25am
Hi Jay, Seems like you have had a lick of the ice cream and now you want more. Also you have learnt a couple of things along the way.

From personal experience of starting out with a blokart, which are a good thing, to then building a Lake Lefroy Mini, if you decide to build one and stick to the plans downloadable from this site (free), I am sure you will be more than pleased with the result.

I made a couple of variations with mine that you can see in this thread www.seabreeze.com.au/forums/topic.asp?TOPIC_ID=48684, but I did stick to the main dimensions. One thing that I did which is not quite successful was to use 1" solid axles. Paul's set up with 20mm axles with retainer clips I think is the best way. Happy building and be sure to post some pics. Cheers Cisco
Hiko
Hiko
1229 posts
1229 posts
29 Aug 2009 7:33pm
Hello again Jay Interesting to read about your exploits with the buggy
As Cisco has said above if you do decide to build from scratch the Lake Lefroy Mini
is an easy build and good performer very happy with mine
Regards Hiko
responderman
responderman
82 posts
82 posts
1 Sep 2009 3:25am
Look what i've been doing
I altered my 6.2 metre sail down to a 5.2 metre , and in doing this it I reduced the boom length from 2.2 to 1.6 metres long. Im hoping that this will help things slip along better. I also will be adding full battens as well
Not only but also,
I started making a "landyacht" mini yacht. As everyone else is naming theirs I will be calling mine "The Long Pom Special" as I have had to add 150mm to the front of the main pole due to me being 6'7" tall and the mini's only going up to people 6'0" tall. The plans are very easy to follow thanks landyacht, and got most of the main welding work done in a day. More photos to follow once I progress. I tend to spend more time grinding away bad welding and starting again, my excuse is i'm only joiner





More later
Jay
Hiko
Hiko
1229 posts
1229 posts
1 Sep 2009 12:38pm
You dont let the grass grow under your feet Jay
Just a couple of thoughts
You may want to put a reef point in that sail to cut it down a bit for stronger winds
Also maybe the mast step needs to be moved forward if the wheel base is going to be lengthened
Hopefully some one will be able to say how much if at all
Well done Looks great I look forward to see your progress
cheers Hiko
responderman
responderman
82 posts
82 posts
1 Sep 2009 3:53pm
Hi Hiko.
I did wonder about the extra length but in the end I left it alone as the back end of the yacht from the mast step backwards is a per plan, all I have done is move the front wheel forwards 150mm so I am open to more ideas on this one please.
Good idea about the sail, I will do that I think. Its just a matter of adding another row of eyelets.
Thanks for your input
Regards
Jay
landyacht
landyacht
WA
5921 posts
WA, 5921 posts
2 Sep 2009 8:42pm
Jay , given your size , can I suggest you add a "U" shaped strap of flat bar or 3/8 rod under the mast step and chassis. we have found that heavier sailors who really push their yachts with big sails have had some cracking at the mast step,
its only happened when sailed on hard clay pans, with really hard sailing and oversized sails.
isnt that right TP1
responderman
responderman
82 posts
82 posts
3 Sep 2009 7:12am
landyacht said...

Jay , given your size , can I suggest you add a "U" shaped strap of flat bar or 3/8 rod under the mast step and chassis. we have found that heavier sailors who really push their yachts with big sails have had some cracking at the mast step,
its only happened when sailed on hard clay pans, with really hard sailing and oversized sails.
isnt that right TP1


Thanks Landyacht, fair point that! The main beam is a heavey post as well but it needs all the help it can get what is your opinion on the front end being 150mm longer? do you think it will make any difference to its handling? will a 5.2 metre sail still be too Big?
Regards
Jay
landyacht
landyacht
WA
5921 posts
WA, 5921 posts
3 Sep 2009 8:48pm
I think it work just fine. Its a pity you couldnt squeeze into the spec, but it would have been a squeeze, better to go for comfort without going to too big a class of yacht.
you could still build to the dimensions but put a footbar either side of the wheel like a kitebuggy, that would work and keep in spec.
heres a photo of the strap I was refering to

responderman
responderman
82 posts
82 posts
6 Sep 2009 5:30am
landyacht said...

I think it work just fine. Its a pity you couldnt squeeze into the spec, but it would have been a squeeze, better to go for comfort without going to too big a class of yacht.



So is the spec the same over here in the UK then? I have now sewn the sail to the size show and its come out ok. I managed to find an old machine to use and its all gone very well. Photos to follow, but one more question is are what are full lenght battens like? do they have the same flex all the way along?
Regards
Jay
Hiko
Hiko
1229 posts
1229 posts
6 Sep 2009 7:39am
Hi Jay
The battens are best shaped to have an aerofoil shape from front to back
If you place the front of the batten up against the wall and push on the rear of
the batten the point of maximum curve [the drive point] should be between 25and 35 percent of the length of the batten back from the front[luff] and the force to achieve this should be between 1 and 2 kgs
These are average ballpark figures some sailers would do theirs differently
A soft high shape with the drive point at say 25 percent is good for light winds and low speed grunt and a harder lower shape with the drive point further back toward 35 percent is better for higher winds and speeds
By using a set of kitchen scales and a disc grinder you can shape them to suit your style Only the front of the batten needs to be shaped [thinned ] until you get the required figures take your time and you will be able to get them right
As you are a bigger guy like me I would suggest a full shape at 25 to 30 percent back would suit you best to give you the low down grunt especially in the light
for harder winds you could slip in some extra stiffening into the pockets to stiffen up the battens and back off the batten tensioning Hope this helps
regards Hiko
responderman
responderman
82 posts
82 posts
6 Sep 2009 8:01am
Hi Hiko,
Thanks for the quick reply, I should have asked what to use for the battens. im guessing some kind of glassfibre rod? I did wonder about using a peice of carved bamboo pole and shaving it to shape. i say bamboo as I have a nice 75mm round pole i could split to use. I guess its one of those try it and see jobs, I can let you know if it works. Will you be out this weekend in your yacht?
Regards
Jay

Gizmo
Gizmo
SA
2865 posts
SA, 2865 posts
6 Sep 2009 12:20pm
responderman said...

landyacht said...

I think it work just fine. Its a pity you couldnt squeeze into the spec, but it would have been a squeeze, better to go for comfort without going to too big a class of yacht.



So is the spec the same over here in the UK then?
Regards
Jay


Most of the small yachts in the UK are manufactured and as such match themselves but there doesn't seem to be just "ONE" spec for ALL mini yachts.... But there is seeming to be a trend that people are building yachts (like yourself). And it would be nice to have a "standard" size for small yachts, looking forward to the future of the sport.

Taken from www.seabreeze.com.au/forums/topic.asp?TOPIC_ID=39791
We designed and built these yachts to give those club members who were not financial enough to buy a BLOKART an opportunity to have a similar yacht.
Simplicity of design and construction were important as was the re-use of materials,such as windsurfer sails and masts. In order to retain the equality of racing with the blokarts we have retained the overall measurements. the length is based on wheel centres to allow for a variety of wheel diameters and the width based on overall width to stop yachts from using FAT tyres to gain more width
no sail restictions were applied to allow the use of bigger sails on poorer quality surfaces,eg grass fields.
It is hoped that the loose rules will encourage people to try out their own ideas and experiment with new materials . We decided that freedom of design should be encouraged by setting only wheelbase dimensions,and minimal safety requirements.
RULE 1a. MAXIMUM LENGTH (WHEEL CENTRES) 1640mm
RULE 1b. MAXIMUM WIDTH(OVERALL) 1510mm
RULE 2. Yacht must have an effective seat belt which must be worn correctly when sailing.
THe following are recommendations only.
yacht should have a brake.



Hiko
Hiko
1229 posts
1229 posts
6 Sep 2009 3:13pm
responderman said...

Hi Hiko,
Thanks for the quick reply, I should have asked what to use for the battens. im guessing some kind of glassfibre rod? I did wonder about using a peice of carved bamboo pole and shaving it to shape. i say bamboo as I have a nice 75mm round pole i could split to use. I guess its one of those try it and see jobs, I can let you know if it works. Will you be out this weekend in your yacht?
Regards
Jay




Hi Jay
Modern battens are usually glass fibre or some other composite matierial but they used to be made of wood and you could make them that way by perhaps laminating two pieces together to form battens say 25mm x5mm or thereabouts By laminating them they should be more durable and stiffer I seem to remember you were a joiner? No wind this weekend here for sailing we are in the middle of a large anticyclone Havent been out for a while actually
regards Hiko
responderman
responderman
82 posts
82 posts
6 Sep 2009 6:39pm
Hiko said...


Hi Hiko,
Thanks for the quick reply, I should have asked what to use for the battens. im guessing some kind of glassfibre rod? I did wonder about using a peice of carved bamboo pole and shaving it to shape. i say bamboo as I have a nice 75mm round pole i could split to use. I guess its one of those try it and see jobs, I can let you know if it works. Will you be out this weekend in your yacht?
Regards
Jay




Hi Jay
Modern battens are usually glass fibre or some other composite matierial but they used to be made of wood and you could make them that way by perhaps laminating two pieces together to form battens say 25mm x5mm or thereabouts By laminating them they should be more durable and stiffer I seem to remember you were a joiner? No wind this weekend here for sailing we are in the middle of a large anticyclone Havent been out for a while actually
regards Hiko


"RULE 1a. MAXIMUM LENGTH (WHEEL CENTRES) 1640mm
RULE 1b. MAXIMUM WIDTH(OVERALL) 1510mm
RULE 2. Yacht must have an effective seat belt which must be worn correctly when sailing.
THe following are recommendations only.
yacht should have a brake".

Yes I remember reading this now, being tall does cause all sorts of problems so I will need to have a rethink on this length again. it would be a shame to go out of the rules set above if a class were to be set in the future.

Wood would seem to be the best choice to me as I can trim each one with ease. I think I will try bamboo also to see what is best.

We are just about to start autum here and the leaves are just starting to turn, its always sad to see the end of summer, and I find myself hoping for just a few more warm days roll on summer
Regards
Jay
Gizmo
Gizmo
SA
2865 posts
SA, 2865 posts
6 Sep 2009 8:32pm
Jay you may wish to think about moving the seat back a little to give you the leg room, you will need about 10kg+ approx downward force on the front wheel to enable turning. Just need to make a slightly different "tail" for the LLMini to enable the seat to go back, give it a try... nothing to lose
responderman
responderman
82 posts
82 posts
7 Sep 2009 3:33am
Hello again,
Ive had a busy day welding and grinding although a lot is being done twice, and this is what I came up with now. You my be able to work out that I kept things standard in length, and will fit myself in by fitting the steering as low as poss and put the seat back a little too. thanks to all of you for your ideas, it seems to be coming together well now. the steering seems to self level to a straight course when let go. I still have the bar to wrap round the mast step as landyacht said, and the seat back mount also.
anyway here is what you want to see, work in progress.
Regards
Jay
P.S sorry about the quality of the photos, it was to late by the time I saw they were not good.




Gizmo
Gizmo
SA
2865 posts
SA, 2865 posts
7 Sep 2009 10:05am
Yes the steering does self centre a little bit, the front of the frame drops about 10-15mm in the centre position.
responderman
responderman
82 posts
82 posts
9 Sep 2009 6:06am
Its to dark now to take a good photo so it will have to wait, but I have altered the steering shaft as the last one was to short and went tight once my weight was on it. I have also added the strap around the mast step as landyacht recomended, so im hoping that that is strong enough now. I also welded on the back-rest point and made the pole to go into it. SO I think that all of the welding is now done, but im sure some will need doing around the point that I add the second coat of paint I also dropped a couple of boards on it and tried it for size.....................and I fit in it OK, so im as chuffed as a dog with two tails. Like I say, I will add another photo when its light here again. It gets dark here now by 19.30 so im glad to have a place to work in.
Regards
Jay
responderman
responderman
82 posts
82 posts
9 Sep 2009 8:23am
I just thought of another question about my mast and it being to long.
I read landyachts write up about cutting and joining the mast, and all seems fine but does it cause a weak spot at the join over time? My mast is a dark grey/black in colour, and I think its made of glass fibre but not fully sure. its construction is like a shallow spiral up the mast. I would hate to cut it and have to get a new one, if I messed up. We have some good strong wood over here I can use, but just nervous to try.
Regards
Jay
landyacht
landyacht
WA
5921 posts
WA, 5921 posts
9 Sep 2009 8:35pm
responderman said...

I just thought of another question about my mast and it being to long.
I read landyachts write up about cutting and joining the mast, and all seems fine but does it cause a weak spot at the join over time? My mast is a dark grey/black in colour, and I think its made of glass fibre but not fully sure. its construction is like a shallow spiral up the mast. I would hate to cut it and have to get a new one, if I messed up. We have some good strong wood over here I can use, but just nervous to try.
Regards
Jay


I wrapped a bit of fibreglass around each side of the joins . of the 2 masts I made, one cracked due to being very old, but has been repaired, the other is fine.
for the joining timbers I would just use a bit of douglas fir, ash if you have it.spruce if your really flash.
re the bamboo, the brazilians used it right up till mid 2007. I reckon as the load of glass battens they importd runs out they will be smart and go back to bamboo.
. You can also get the cane from cane furniture,soak it till it softens,straighten it and use that.make sure you varnish it afterwards.
PS we are all jealous of your lovely wheels

responderman
responderman
82 posts
82 posts
10 Sep 2009 5:14am

Hi there,
My wheels are just peter Lynn buggy wheels I took off my old crap kite buggy (the best bits on it) the axles are also cut from my buggy, so I guess what im saying is, I have no crap buggy any more. You may well notice that all the bits that are supposed to be square are round on mine, I only did this as it was already available and it fitted in well with the bits off my buggy. if I do another then it will be as landyacht says. I recon square would be much easier to make, but up to now I have spent nothing apart from the welding rods I used.

When I was on about my mast being to long I was refering to it on the car, but I guess you worked that out. thanks for the heads up about cutting and rejoining the mast, I will give it a go. last time I went away with it I spent much time making sure no body hit their head on it. It only was a foot to long, but people seemed drawn to it

just the paint job to do now and then its down to the seat, and I had a good idea there. I wondered about making a plywood laminate seat, made from layers of 3mm ply stuck together in an shallow S shape to support behind the knees and come up behind the rear to provide a bit of back support. Then again out of ply make a curved back to hold me in a bit. It should be quite easy, and I will post photos of it in progress.
Last of all, here are photos to show the progress.
Be happy
Jay



Hiko
Hiko
1229 posts
1229 posts
10 Sep 2009 6:36am
Hi Jay
The plywood moulded seat sounds like a great idea and you should be able to make a very nice seat that way
When you are making it you could also have in mind that it could be used as a plug for fibreglass seats for all the minis that will get built when the locals see yours!
Cheers Hiko
responderman
responderman
82 posts
82 posts
10 Sep 2009 6:48am
Hi Hiko,
Good idea about the plug, if it works OK then I will maybe give it a try. One question I do have is how important are sides on the seat? if I do make this seat will sides be a must.
its quite amazing how few people have seen a land yacht over here on the east coast, even though we have a club that has run here for years I'm not in the club myself as they all seem to run about in real big rigs, It seems much more serious than myself. still you never know it could catch on, less than a month ago I hadn't heard of a Landyacht's Lefroy mini now I have one nearly!
Have a good day
Jay
Hiko
Hiko
1229 posts
1229 posts
10 Sep 2009 9:18am
Hi Jay
Sides on the seat are good things I made my mini seat narrower than standard and
its good to be snug in there when you do fast turns and lift a wheel etc
Some of the guys are fitting grab handles to hold on to in the turns which are also good in my opinion
My seat has a stringer on the outside at the top and I hold on to that but grab handles would be better
Dont forget the seat belt either Staying within the triangle of the three wheels is a healthy thing to do
Cheers Hiko
landyacht
landyacht
WA
5921 posts
WA, 5921 posts
11 Sep 2009 5:23pm
I concur with the sides. deep is good. If your body is snug in the seat, you (and the kids) will feel all the more secure, add a good seat belt and you will lose all fear and start really pushing the yacht in turns( that the best bit)
I do love a good long drift turn.
If you are good at ply laminating, or coldmoulding the possibilities for a truelly beautiful seat are endless.
feel free to impress us (and the rest of the world)
especially as you are about to become our first official ambassador.
On foot pedals, I would recommend a plate of some kind for your feet. better grip makes steering easier, especially over bumps. if your seat is open at the front, thn a small sideguard helps
responderman
responderman
82 posts
82 posts
12 Sep 2009 5:45am
The laminate ply seat is drying as I write, and if it comes out ok it will look cool. not sure what shape to make it yet, will have to have a play with it.
If I make this land yacht to landyacht's approval then does that make me an honorary Australian? LOL
I'm painting the metal work this weekend, so things will start to look a little better I hope. I should be going away with it next weekend to test it out if its finished on time.
The steering pedals are yet to be made, but I looked at every ones and it should be easy to make a set. Most kite buggies have a strap over the foot to stop it coming off the pedal, I may try that out also.
I will take some photos of how I bent the ply for you all should you want to try, its easy to do.
Bye for now
Jay
responderman
responderman
82 posts
82 posts
13 Sep 2009 3:52am
Here are the photos of the work ongoing, the seat is made of four sheets of laminated ply glued together over blcks of wood and screwed down. it is left to dry over a day and then taken off and cut to shape. no fancy equipment, just lots of glue.
Cheers
Jay



Hiko
Hiko
1229 posts
1229 posts
13 Sep 2009 10:13am
Wow looks cool should be light too
Good job!!!!
Hiko
landyacht
landyacht
WA
5921 posts
WA, 5921 posts
13 Sep 2009 7:56pm

responderman
responderman
82 posts
82 posts
13 Sep 2009 9:23pm
landyacht said...





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