Perfect springs, your thoughts about..

[Dome]

Lol,
Ever thought about using the energy in a more efficient way than what is done actually …..
It doesn’t look like to me..….

Have fun, jump high, says Dome

[martin]

@Friis
try one time such a thing http://www.eurotramp.com/ (used at the olympic games).

Professionals get up to 9 meters  on them (just with muscle power and efficient springs), then you know what efficiency is. 

I would say there is still a little bit (technical) improvement possible on our stilts. 

[Friis]

Well there is some improvment to be made. But the comparison you made wasn't so great I think... It's not like you push down the trampoline net a few decimeters when you jump on it, like you do with your bocks. 2 meters springs that you can compress a meter would look kinda funny though
If you compress a spring with X newtons, it will wanna push your leg up with X newtons. This brings me to a question I have... ill make a new thread about that

[Dome]

Hehe,
that's why I liked that much the reply of Frank. just by observing the spring behavior on the vid, he understood the whole thing about. But sorry Friis I don't feel like revealing secrets just to make you understand the easy way.

Have fun, jump high, says Dome

[Mr Frank]

Here is a detailed explanation of why Dome's springs are so wonderful.  If they aren't that impressive to you, you should read this.

It's a question of how much energy is lost in the form of heat in every bounce, and the relative strength of the spring at different levels of compression.  For those of you who have not taken physics yet or took it too long ago, an "ideal" spring will give a force of X pounds at Y inch compression distance, and 2X pounds at 2Y in.  This is what the character of a cheaper spring equates to.  The higher-quality springs are more like .75X pounds at Y inches and 3X pounds at 2Y inches, with force increasing much more than it "should" as compression increases.  This makes them very soft and smooth for walking around and jogging, but still have the power to fling you high in the air once you start bouncing.  Better springs are soft at the top of the compression and stiff at the bottom. 

The mystery springs are more extreme in this non-ideal behavior than any other spring on the market by a lot.  They are so soft right at the top that you land very smoothly and hardly have to brace yourself when you land.  This is very nice because a lot of the energy lost in a bounce is lost in that moment from all the shockwaves that shoot through your body.  If you look back at the video, you will notice that Dome receives no shock from landing.  He goes down very gracefully, and then the springs shoot him right back up again with very little energy loss.  If you look at people on other springs, there is a noticeable impact on their bodies when they hit the ground.  The impact is smaller on 7leagues and Powerskips, but still visible.  The other side of the non-ideal spring behavior is being very stiff at the bottom of the compression.  This is the only way to pack great power into a spring whose first few inches are soft enough to comfortably run on.  If you look closely at the video, Dome experiences much more acceleration at the bottom of the compression than he does at the top.  At first, he only slows down a little, then the spring stops him very quickly and shoots him back up.  I also noticed that as his jumping height increases, the distance he compresses the springs increases less and less per added inch of jumping height.  That's two pieces of evidence pointing to the fact that those springs really don't want to compress the last few inches.  This is why the springs are so wonderful.  I could have simply stated that they are very soft at the top and very stiff at the bottom, but that would have been far too concise for the likes of me.

By the way, he mentioned a "turbo" function for the last little bit of the spring.  In case you didn't catch what he meant, it's an extension of the non-ideal behavior i explained above.  He intends on making the springs extremely stiff for the last little bit of the compression.  It may feel a little rough at first, but it would be much better than bottoming out.

[Dome]

Holy sh** Frank,
you're amazing..... I real did not think that one only person would see as much, just from that little video. Are you study phisics??? So if, you're probably not in your first semester.
Good luck for me, that there are still a few more secrets around them, otherwise you would have busted me. 

Have fun, jump high, says Dome

[martin]

Well there is some improvment to be made. But the comparison you made wasn't so great I think... It's not like you push down the trampoline net a few decimeters when you jump on it, like you do with your bocks. 2 meters springs that you can compress a meter would look kinda funny though
If you compress a spring with X newtons, it will wanna push your leg up with X newtons. This brings me to a question I have... ill make a new thread about that

Why is my comparisson not valid? Go one time on such a trampoline and you will feel the difference (re energy exploitation).

I fully agree 32cm compression is different to 1 meter on a good trampoline (which I already outlined in http://www.PoweriserPages.com/forum/bottoming_out-t1357.0.html ) but still the point I wanted to make is that trampolines are more engergy efficient (way more than bocks). I would (as my personal guess) say when you compress bocks with X newtons they will push you up with X/4 newtons. I do not think that efficiency is above 25%.

[Trip Master]

Well i jusy want to say well done for actually making the springs Dome. It will be intersting to see the results, have you remembered to contact the Bocks in Germany and agreed a contract to allow you to eventually sell these springs as they will be covered under the patent. I'm just making the comment as you are obviously putting alot of time, effort and money into this project. 

[Locky]

I'm going to agree with Mr Frank here. The bottom of the bounce (landing) is a very important stage. I cant really comment on domes but they do look smooth but just comparing powerisers to 7's recently I was amazed how much of the energy is lost on the powerisers compared to the 7's.

Maybe Dome is taking things one step further. I hope so

[Dome]

Haha,
our engenier had to smile about some of franks proclamation, but nothing less Frank did see very lots of things quiet the right way by just a bad quality youtube video. I wouldn't have been able to say anything about behavior, without checking them out in real. But as you mentioned yourself locky, there is still much energy waste, talking about springs of today.
And Trip,
I'm in contact with Andrea Böck, seen I do sell Powerskip as well. But first of all, switzerland isn't part of the patent protected country's, so for all springs sold within switzerland I'm free to do as I like. And if the springs should go to other country's and the patent should be valid there, the mystery's would be some more expensive, seen I do not make illegal imports or exports.

But last saturday these mystery's of the last video did go back to the spring maker. And this early morning the engenier has been standing in front of my door, with these mystery's one more time transformed. So now e're on the edition 4b that will be checked out tommorow. The added improvements now are first edition with worst case split protection and first turbo kick function. Hopefully both improvements will work like expected, what would bring us very close to the point of ready to be sold.

Have fun, jump high, says Dome

[tundrah]

What weight range will these springs be able to withstand?

[Dome]

Hi Tundrah,
if they will be at the point to be ready tro be sold, we will make them from 50 up to 130 Kilos as standard and higher ranges on request.

The ones from the Video can be considered as equivalent to the PS 580's from the weight range. I do weight 88 Kilos and the second bouncer of the video has about 80 Kilos.

Have fun, jump high, says Dome

[Kiola]

i still want a set of 140s

[Dome]

Hi bouncers,
Today I found just a very little moment in the evening, to have a short first view of the last improvements on the mystery’s. So no video for the instant, but hopefully we would find some time at Friday or Saturday, to make the next little video. The turbo function is working well with some nice extra surprise effects, but it needs some more fine tuning, seen there is more to get out with it. The extra kick is coming now, that can be felt quiet clear, so now we’re going over to fine tuning work of the whole behavior curb. But even at this stage, no other spring feels real satisfying for me anymore and I urgently need a ready to be sold mystery spring for my own use. Hopefully they will pass now the tests about lifetime, seen I real don’t want to miss them much more longer.

@Kiola
It’s as I wrote you Kiola, I doubt that you real would buy springs that much out of your weight range, once you tried the mystery’s.

Have fun, jump high, says Dome

[bocking mad]

so is your aim to get higher on them or is it to make jumping easier? both?