Good to see you dropped in, you've been lurking for quite a while now.
I don't mean to be too harsh but I don't recommend your plans to people because from what I've heard and seen, they are well, crap. There are lots of basic mistakes, so much so that if you followed the plans word for word, it simply wouldn't fit together and drive. As Redsox says, the arachnid is nick named the ah-crap-nid. There is pretty much a "DIY go karts" formula for making your plans work properly.
The 2 free plans you have listed show karts with no Ackerman, also, the way you run the tie rods out the front means it can be very difficult to incorporate Ackerman with out spacing the wheel way out on the spindle creating KPI problems, but you didn't incorporate KPI anyway. The tie rods hanging out the front, unprotected, is quite a bad design, what if you hit something at speed? Then your tie rod will bend(or snap), possibly ripping the steering wheel out of your hands, if the object you hit didn't stop you then you've got to front wheels pointing different ways and very limited steering, not to mention a broken kart.
None or your karts have a floor, that is a basic safety failure right there. I'm sure my balls have literally been saved many times by having a floor. I wouldn't ride a kart without one. Extremely dangerous.
One thing I really question of your karts, they seem to very much employ form over function. There are some engineering faults made IMO in the quest for style.
Check out Edge products plans, their plans are very professional, they also simply make sense and don't need the paragraph long notes you include about every piece of metal. Also, Edge shows you how to make every component that goes into the kart, with your plans you get the design for an incomplete chassis and you have to buy dozens of components.
Here are some things from the "Itzy Bitzy" parts to buys list that should IMO be shown how to be made in the plans.
- Foot pedals
- "shock mounting tab" aka steering bracket
- Brake rod
- Throttle kit
- Tie rods
- Spindles
- Spindle mounts
- Steering shaft
- Steering wheel hub
- Motor mount plate
Of course, still say where you can buy them.
Buy a set of the Edge plans, you should learn a bit from them. I know Edge plans are a lot more expensive than yours but IMO it's certainly worth it. Their basic "Fun Kart 3" has KPI, Ackerman, camber, a roll bar and harness. The plans also include a large section on safety, a glossary of terms, a unit conversion table, metals ID page(mm to gauge, decimal to inch, colour ID ect), a very in depth tools required page, several pages stating all the nuts, bolts, washers, grubscrews ect you will need, several pages stating what kinds of metal, the over all length of metal you will need and the dimensions for every frame component, a how to page on chassis fabrication, a contents list with the page that every different component in the plans is on, plans that are very well set out and make brilliant sense, a page on motor selection, a page on gearing and all the theory behind it, several pages of parts lists (Edge make and sell their own parts), tyre lists and recommendations, a page on how the comet Torq-A-Verter works and then ads for their other buggies and trailers.
You should be including a lot of that.
I do commend you for including a PDF on welding, the quick jack is cool too. I'm sure many people will appreciate those. Also, thanks for taking the effort to make the plans and sell them, I'm sure a lot of people will be really thankful for that.
Thanks
Hayden