Lol then why did @onloop carbon fiber the top and bottom of his raptor 2 deck. Fiber glass is a very light material and adds strength no matter on bottom or top. Compression forces are the same on the top aand bottom of the deck
On the top of the deck, you have compression forces and on the bottom, you have tension forces. Bottom part is expanding when bending while the top part is compressing. Itâs very simple physics. gfk or cf wonât help a lot on the top of the board or anything that flexes the way our boards do.
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We donât know if that is actually carbon - could just be some foil for looks.
No trust me I understand the differences between tension and compressive forces. I still would like to do more research on this but if you are using a fiberglass (or carbon fiber) cloth, the woven kind not the matt, it has a high compression threshold. We use the stuff to make wings all day long and yes I agree underneath the wing is subject to tensile forces, but the top is also subjected to huge compression loads. And the stiff holds up great! I know the aviation grade stuff is a different weave pattern as well as density. But on compression loads the resin takes most of the load, where the glass takes the tensile loads.
I would like to gather some actual test numbers on this as well as what compression loads do on a laminated surface (like one of our boards). Let me look around for a bit and Ill see what I can find.
But until I can find some of that, I actually put 3 layers on the top of my vanguard which was already covered in a fiberglass material until I sanded it off. And there was a noticeable difference with the flex of the board. Before I removed it, after I removed it, and again stiffer after I put my own on it after I installed my wires. Im not completely convinced yet. I would also like to see what the weight of what the extra thickness would weigh verses the top glassed verses the top and bottom glassed. I doubt it would be substantial of a difference.
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Exactly why you do not need the carbon layer in the first place - pure resin would do a better job. So why even bother to add carbon on top when it is much better suited for bottom. In a wing it is different as you have forces bending the wing down (gravity) or up depending on the lift. In a deck top makes no sense and is a waste of time and money. Putting the same carbon on the bottom will give you much better results compared to top. Maybe @whitepony can gives us a better insight and share his knowledge.
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Not sure what the right thing to do is now. Remove more material? Also I would like some ideas for the motor cable routing. Just drill some holes in the enclosure part or do @longhairedboy style channels on top?
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i think you know what i would do. lol
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I see what youâre saying. But that would be assuming it only has compression acting on it. If there is any bit of bouncing you introduced tension so itâs not something you can do without. I still agree both sides are the best. i just think for me the jury is still out on a top lamination as being an actual structural feature and not just moot.
If anyone else has some insight on the matter I would love to hear it.
This looks fantastic!!!
Can you take a pic of the side of the board. This thing is Inspiring!
How much did it cost you to CNC and the material costs?
I just want to know if i am getting ripped off or not by this manufacturer
I could cnc that for about 50$ + materials
I got a quote 67$ inc materials
Thatâs a very fair price.
All right thanks is there any other materials I should consider other than plywood
if you are a street skater, than you would know a few companies have been playing around with carbon fiber on decks. Girl/Chocolate skateboards have been making these decks they call âpop secretâ with a layer of carbon fiber on the top, and I have ridden at at least 20 of them over the last year or so. They do have a bit better of a pop (which is irrelevant on an eboard), but they also are much harder to snap in half. Many times, I have stomped nose and middle of the board down this massive 3 block hubba at my local skate park, and most of the time, it doesnât break. When I skate blank decks or even other pro decks without the carbon fiber on top, they break every time when I stop stomp nose and middle of the board.
So from my experience, the carbon fiber on the top does add strength. I get the whole tension/compression force dynamic, but it does have an effect still.
My 2 cents in this though is that you shouldnât âneedâ to re-enforce the board with composite materials. Iâve found that if you press your own deck with veneers, not only can you put whatever concave you want into the deck, but you can achieve incredible strength.
If your doing this for just 1 or 2 boards for your self, this is very easy to do with a roar rocket vacuum press kit. Total cost would be around $200 USD for all the tools you need and if you buy a few decks worth of wood, around $50 per deck in wood and another $30 in glue per board.
It was a favor - so basically I paid nothing. 67$ however sounds very cheap actually.
Thanks man , I want to make some modifications like power switch, charging ports some wiring cutouts
think this is close to a myth. tensile vs. compressive strength of epoxy fiberglass composite is pretty much identical. for carbon its midly in favour for tensile strength. so if you put it top or bottom wont matter very much!