Landyacht; I am very impressed by your Mini Magic trolly design. I dont think I could make much improvement on that appart from larger diameter wheels. Are you happy to let us homebuilders copy your design? I would like to build one but with 20" BMX rear and 16" BMX front wheel. To save me a lot of trial and error, what size SHS did you use for the main frame members. Also, how is it running? I suspect you are streets ahead of the other Minis and Blokarts.
Before I start , the mini magic known as NAPPY RUSH is not, has not been and never will be a TROLLY!!!!!!!!!'
moving on I assume the steel your refering to is the square galv.
the outer size is 35x35, the inner is 30 x30, 2mm wall youll need a bit of 25x25 inside that at the joints if you plan on doing any serious racing, or running over blokarts.Performance wise , it will only keep up with a class 5 at this stage, maybe the bigger rear wheels will be the breakthrough
that Y angle is 45degrees whichjust makes things easier to cut and measure. I have no toe in or out built in.when building I had to shut one of the shed doors as the wind would blow the bare chassis out the other door
This is not a design for a beginner or a BIG lad as if you hit something it will bend those rear axles. . Ive since sold the yacht, as I felt the mast step was a bit too far back, resulting in a degree of uncontrolability when sailing downwind on Lake walyungups gravelly surface. next version will hopefully correct that.
Please be true to the mini specs and dont be temped to go longer or wider, you'll be glad you didnt, as they are little crackers to sail
With a small reconfigureation of the joiner/tilt plates for the rear frame (ie the tilt adjustment holes being on the lower side) the yacht can become a folding yacht with the rear seat frame folding forward over the main frame. Convenient for transporting it.
Just a thought. Cheers Cisco
Thanks for that info Landyacht. It was a bit difficult to guess the steel sizes looking at the pictures. Sorry about the "trolly" reference, that's what we call the frame part over here. What was the total weight ot the yacht fully rigged? Are you building another one?
You dont have to worry about him being large Landyacht
last time I saw him out he had half the yacht filled with sand to hold him down
Hi, I have done a search looking for mini magic, with the only result being this topic, HELP!!!
As regards Clem and weight, it's not only the yacht will blow out the garage door, when he stands sideways he gets lost behind power poles! Sorry Clem,!
The trolly label is a Clemco original!
Here is the thread for "Nappy Rush"
Hi Gizmo, thanks for posting that.
Paul now I know I didn't build it but the best 10 smiler yet was the Clog which I brought back to NZ, did you ever get to sail it when you were over here post 90?
Typical John Glenn yacht, very light on the front, rubber band leading link front end, inertia mass damper on the front to kill float, You ccould throw this Class 4 into a 360 at terminal velocity and carry on at almost undiminished speed. I wonder where it is now, might have to ask around.
Now the inspiration has started, I might have to do a mini like the Glenn "Flying shovel"!
Am I allowed? Little wing mast, skinny wheels, etc,,, hmmmmmmm
30x30 SHS only comes in 1.6 wall thickness according to my latest Steel & Tube handbook. Would this size fit neatly between a 25x25 and a 35x35x2.0 ??? Does on paper.
By the way I may be small, but can be very fast! I have been building and sailing landyachts for nearly 20yrs.
Clem, it may pay to check what is ACTUALLY AVAILABLE as compared to what's in their book. They include all available dies, even if they have not run any for the last few years.
The issue wont be the wall thickness in itself, more the corner radii, the only way to know, will be to go to the steel supplier and physically check. And don't assume that because the version of any tube overseas fits, that NZ tube will. They may be using different dies when they make it at Glenbrook mills.
I realised that, yes you are right. Steel size does vary depending on where it has come from. I might stick to tube anyway. A Y frame "TROLLY" with big wheels will need to have some camber and tracking adjustment built in like our OTTs.
Yes I will go along with that
I have some 35x35x2 some 30x30 x1.6 and some 25x25x2
In theory there should be 1mm clearance between the 30mm and the 35mm
but they wont fit not even close and the clearance between the two smaller sizes is huge more than the 2mm would suggest
Finding the right sizes without buying 8 metre lengths is not easy I have lost count of the engineering places I have been looking
Even with buying 8 metre lengths its probably not easy
Question about the Mini Nappy Rush Y yacht. It is a great design. I love it!
But "Mini Magic" sounds much better don't you think?
My question for the designer and the the test pilots who have sailed it.
Was that backrest strong enough to support the rear sheeting or were you compensating with your body weight to hold it down? I could imagine getting hit by a gust and the sail getting fuller as you got lifted with the seat. That would be scary. Does that backrest need to be any stronger? or was it ok?
yes you will have to shop around for your steel sizes. here in oz there are 2 suppliers, One steel and bluescope. their products are very similar but frequently dont fit one another. I shop at bluescope as they have the stuff in stock more often.
the rear frame is 25mm od electrical conduit, ( good product for stength and telescopicity(?) the bigger sizes would be suitable for axles. MIke Day flogged lots of kiwis in 1986 with this stuff. the lower support bar is solid 10mm . When bolted up it just doesnt move. the white material is polyethylene bulky bags,2 layers, sewn at home. under your bottom is a layer of industrial plastic from a 1000l bulk container. it is sewn in between the 2 layers.
The plastic was added after the first sail when I managed to put some streaks in the seat( hence nappy rush) running through a drain.
the MINI Magic tag is courtesy of Hills
the reason for lack of measurements is that all the essential numbers are "mini explorer". If you are building a similar chassis it needs to be custom made for your body dimensions, and is not a beginners project
I've found all these bits for my new mini. Most of them are left over from the first class five I built 20yrs ago. I will post my plan up soon as I work out the steel sizes. I will do most of it in tube appart from the backrest. Landyachts Nappy seat looks to be the best idea.
all you need now is a ball of string and a couple of rolls of duct tape and it would be sailing in a few hours....
dam, maybe I will have to think about building one of these things myself, last thing I need is another project. But the room for expereminting is endless, wings ,wheels, shape ect.
Paul's "Nappy" design is pretty ingenious... Should be an interesting build.
Looks like you got a nifty seat there too.
Dang, I didnt realize you blokes had some of THOSE wheels left over,
I will have to get back into the shed as soon as the 5 and TP1's mini are done
Please stick to the dimensions, please!
with that chair you could fit a little chilli bun along one side
The chair is just to help me work out the seating position. The biger wheels will help me get up to speed from a stationry start (wheelchair style) because of that dumb Aussy start rule.
As I keep saying, the lefroy mini specs are a length and width. We want to see just what is possible. If they turn into little wings that we get into via a hatch then so be it. early on we considered a sail size restriction, but then BLokart came out with a whopping 5.5m and then HYPERcarbon masts...................
So dont be shy with your experiments, If they havent been done, its because I havent had time to do them.
Please stop refering to it as a class 6 The reference in the specs we set said to take into account the ALSA cl 6 specs IF you intend to race in that class. those rules have changed 3 times since the lefroy mini specs were set, so we are not even trying to fit in.
In the end the very size of these little yacht means they are generally cheap and easy to build, we encourage recycling and the use of alternative materials, like deck chairs gravel bags, and wheeliie bin molds
I also encourage builders to make their yachts pack down as small and conveniently as possible , so that traveling without the assistance of a seacontainer becomes possible again.
so get out there and have fun again
I am glad you cleared that up paul, I think people were getting things a little mixed up. If they want to race in class 6 (whatever the end specs are) build the yacht to accomodate the rules. If they want to try new ideas build to LL minni.
Starting to get to many chiefs on here.