SpudFiles

has anyone though of make a version of the vurtego pogo stick out of PVC. I looked aroung and it says that the inventor used PVC tubing to make his prototypes. I did the math and the pressures produced dont seem the exceed what the pipe is rated for. I guess what im trying to say is do you think a pogo stick (no as high performance as the vurtego one) could be possible.

i would totally do it if we can figure out how it'll work

I'm guessing it works something like this.

It would be easier to make than a spudgun, provided the materials you used were strong enough. You'd also need to make some calculations to figure out the piston diameter, stroke and precompression if any.

uhh you have to figure out piston diameter, stroke and precompression?? what are those??


heres what im thinking?? but im not sure if 2" pvc is enough to hold that much pressure and what jack said.

well theres actually a diagram somewhere but i cant seem to find it again. yeah i did the calcs. im going with a 2'' piston (because i cant find larger o-rings) and a 4-1 compression ratio. i think if it seems to work well i will eventually work up to a 40psi precompression, giving me a 160psi max, which is well under the 280 rating on the pipe.

edit: btw i already started this project and here are some pics, sorry for the quality. I still need to pick up some o-rings and a bunch of bolts

its accually the other way around. the handle part that cwazy1 drew up is actually the part that hits the ground.

edit- actually, no, cwazy1's drawing is correct, my bad...

i found this video, look 1 minute 10 seconds in, you will see what im talking about.



this might actually be fun to try and build, i remember i used to be good with a normal spring pogo stick.

I think this may be the patent on the pogo stick.
http://www.google.com/patents?id=f1Z3AA ... ck#PPA1,M1

tylerthetatertosser wrote:I think this may be the patent on the pogo stick.
patent

well spotted, the design is just like a syringe and it appears to have no precompression.

I hope you built a insurance plan into that design. My perdiction, the first time you hit the ground solidly, the foot pegs are coming off and the handle is going to be in the perfect position to take out some ribs or a calor bone. Sorry about the negativity, but I see disaster when I look at this, I hope I'm wrong. Good luck!

jrrdw wrote:I hope you built a insurance plan into that design. My perdiction, the first time you hit the ground solidly, the foot pegs are coming off and the handle is going to be in the perfect position to take out some ribs or a calor bone. Sorry about the negativity, but I see disaster when I look at this, I hope I'm wrong. Good luck!

That's why he gets his little brother to try it first

well i have done it. i used my drill press as a lathe and put grooves in my piston and mounted my o-ring. I tested it and it works. it takes a little getting used to because of the long stroke of the piston but i could still easily get a foot of air while bouncing around in my garage, it hard with the ceiling. thats all the testing i have so far. it anyone is interested, i will post pics and maybe a vid later. btw jrrdw, i rebuilt the pegs, i knew those old ones wouldnt last.

yeah i built mine today as well. it works, i havent really bounced hard on it yet because well the glue is still drying. we'll see tomrw.

post pics! i wanna see how yours looks, i'll post pics of mine in 2 mins

sorry double post.

16" stroke, precompressed to 30psi.

man cwazy that was fast. do u have a lathe, just wondering how you put on your o-ring.

lol im a man of action, not words.

i dont have a lathe, nor a drill press, nor any other big pieces of equipment. i am a person of "old skoolin" i first make a mark on the piston with a normal wood saw. i make it about 1mm deep and 1mm across. then i take nylon string and smooth it out. then i take a triangular file and widen the groove a little, then i take a circular file and make the grove wider, then i take the triangular file and finally just touch up on parts of the groove that are uneven and until the oring fits and will provide a nice tight fit into my "chamber" if you will call it that.

^^ thats how i do it for my piston valves as well.