I like this idea and got one in return : what about a stack of electro magnets in rails?
String 2 or 3 rails (carbon or alu) accross the deck, cut in small pieces as to allow full flex of the deck. Each separate piece brings its own electro magnet. Current OFF, no stiffness and full flex. Current ON, full stiffness and no flex.
Add a controller able to read VESC motor speed, so it manages current Flux accordingly and you obtain progressive OTG flex / stiffen directly based on your speed without needing to manually adjust. Of course you can program it so it stiffens early or late based on your choice.
Hey there @Vanarian how much weight are we talking about?
I like your ideaā¦ conceptā¦ simply for its creativity an innovation to know howā¦ or WTF lol
There is the cost of the solution as apposed to one likeā¦
āhaving a board with changeable beams of varied flexibilityā
To have the ability to vary the flex would ideally be built into a production board.
How I donāt know or with whatā¦ lol
If you had say a GTX then you would want to mod it for stability at higher speeds.
With a dedicated deck and inserts in the wood (kinda like a squeleton) one can use more magnets of smaller size and discard the rails, so you save weight.
You can also use the rail with small pieces of enclosure so it serves both for stiffening and electronics, it helps somehow.
But As is Iād say ballpark 2kg more minimum for everything, excluding the extra battery pack.
It can definitely be shaved down but thatās kinda a safe estimation I think.
2kgā¦a significant amountā¦ but if it became necessary I dare say a few of us could do
with loosing that amountā¦lol
What about funding? How much would it cost for 2 prototypesā¦
Just in case one went boomā¦ so to speakā¦
Insuranceā¦ incase we knock out any essential services on test runsā¦ EMFās yesā¦no?
We could donate our boards for the greater good.
Could we run the magnets in say a 1 inch band down the rails underneath the deck?
Or āI think having a board with changeable beams of varied flexibility will be the easier way outā
Below is a picture of tubular subframe connectors used to stiffen the chassis of a 66 mustang!
The tubular design resists torsional forcesā¦much better than square.
Run several loops nylon cable lengthwise on the bottom of the deck, taught but under no tension. This is your flex mode. To increase tension and stiffness, tighten the cables in a tourniquet like fashion, stick the rod between the cable loops and twist.
Cheap and easy proof of concept. But I suspect after a few weeks, you might find itās not a feature you use very often.
Well I have no idea how much is needed (didnāt dig too much yet), but after more thought it might be doable at under 1kg + battery and not much expensive
either use big magnets and long rails (like 5 segments) = super strong, easy to build and mount but heavier
Or use many small magnets and small rails (like 20-30 segments) = still super strong, more compact and lighter but a pain to assemble!
Edit : Iād do it for the sake of science but lack the time to test it right now.
I like this idea, if we can route the cables in the deck with a fast actuator type motor and the same stiffen as speed rises control, it might be lightweight and efficient
The University of Michigan team says its new metamaterial specializes in switching its surface between hard and soft states. Applying a small amount of strain allows that stiffness to be changed by several orders of magnitude, without damaging or weakening the material itself.
āThe novel aspect of this metamaterial is that its surface can change between hard and soft,ā says Xiaoming Mao, lead author of the study. āUsually, itās hard to change the stiffness of a traditional material. Itās either hard or soft after the material is made.ā
No to sound dumb or anything, but wouldnāt a solution like trampa has with the flex bridge allow for flexi riding (bridge removed) and stiff riding (bridge installed) all with the addition/ removal of only 4 screws?
they suggest that you can use an adhesive if you want the absloute best results, but i see no issue in using only the four bolts so secure it to your deck. The addition of it to your deck would stiffen it (by how much would depend on the ply you chose) and the removal of it would return your deck to its previous (flexible) state.
If not this exact product im sure something like it could be used to achieve the desired results
it would be more like controlling the āstiffnessā with electricityā¦they have a guy doing something similar already. using electricity to form shapesā¦not sure what liquid heās using.