Re: The Official End of Year Build Off Entry Thread.
Quote:
Originally Posted by dustm
sorry to hear that sniff.
thank you.
So the new dead line is Sunday morning. Whatever date that ends up being. The poll and all voting begins Sunday afternoonish. So you have until then to get your entries in.
Sunday afternoon I will post up the voting poll for all to vote in for the popular vote.
Also I will send a PM to all contestants that they shall respond to with their votes. Details will be encluded in that PM.
__________________
Too many Potters in the World and not enough Baileys.
Re: The Official End of Year Build Off Entry Thread.
Well i will post up what i have, just so you can see, sucks i couldnt get this finished off for the comp, been way to busy making other peoples decks instead of my own.
Re: The Official End of Year Build Off Entry Thread.
sorry for your lost, but belive me the year 2009 is starting on the wrong way......i´m on the way to loose my job..(Hope to find an other one)...my dad ist dying and everything is horrible......the best for you and your familiy...my wishes to you
Re: The Official End of Year Build Off Entry Thread.
Nomex Honeycomb Prototype
I have had the chance to try using a new core called Nomex which is a kevlar honeycomb that is very light, very strong and when laminated correctly has amazing shear resistance. It has strange bending characteristics in that when bent one way it will naturally want to bend in the other way to create a compound curve (like a camber concave board). This proved to be a bit of a plane as i only wanted it to bend in one plain...
I wanted to make a shape i could compare it against so i decided to use my Little Mr bigwood speedboard template and slapped it down onto my w concave mold.
The core is one of the thickest i have ever made and it has a beefy 14mm tall wooden rail to protect it too. This has made this board very stiff with just a few mm of deflection under my 60kg. The flex it has seems to "bottom out" when bounced on. I will pass it around some bigger buddies soon but by the feel this board should be sweet for riders up to 100kg
The skins were made from a low temp prepreg with fibre running nose to tail and at angles that maximize the torsional stiffness of the board. The laminate was also balanced from skin to core as this leads to more even flex patterns. The laminate consisted of 20 different layers of carbon and glue film. It was cooked off at 65 degrees for 6 hours at 2 bars of pressure (and in a vac bag so that gives a total presure of 3 bar on the part). By using a high pressure and strategicly place glue film each cell drinks a little resin that forms tiny fillets on each all of the cell. This is what gives nomex its high shear resistance.
Some carbon peeking out past some grip
To be honest i was hoping for a much lighter board but the ply wood drunk up a lot of resin and made the total ungripped weight come in at just under 1.4kg. I think that this is actually an ok weight as the boards thick wood rails and nose and tail blocks (where most of the weight is distributed at the moment) make this board as robust as any wood board and would survive a crash or rail impact that would be detrimental to most carbon/cap construction boards . In the next board im going to move to solid carbon rails with only thin strips of wood in the rails, nose and tail. This should shave at least an other 500g off but would sacrifice some of the robustness that the ply wood brings to this board.
The other feature i wanted to try in this board is the carbon finger grip wrinkles that i formed before putting this board in the oven. I pulled up a small bunch of fibre along the rail line that would cure with a peel ply finish to give a much more tactile feel and added grip even with thick gloves on.
I also milled the truck holes and was stoked with how well aliened the front and back smoky baseplate sit. This board should be very calm at speed with such good aliment the front and back truck will be running true rather than fighting against each other.
More photos to come as soon as the shops open (so i can go get some longer kingpins and set this sucker up)
the only kicker is that i have formatted over the sd card with my construction photos... Is it ok if i go and take some more "fake" build photos and maybe some detailed photos of the materials i have used (nomex and prepreg?
I've done it before, not using this method, but I can't dig up the tutorial I followed before. Google "flash memory recovery" or similar strings and you'll find a lot of helpful guides.
When you "format" an SD card, most of the time all you're really doing is flagging the card's data as overwriteable. This is cause actually formating the card would take a long time and is usually unnecessary.
[edit]: sick board btw, absolutely inspirational. Precise build and clean lines. What does a foam core bring to a longboard btw, stiffness, or just a light space-filling material?
I've done it before, not using this method, but I can't dig up the tutorial I followed before. Google "flash memory recovery" or similar strings and you'll find a lot of helpful guides.
When you "format" an SD card, most of the time all you're really doing is flagging the card's data as overwriteable. This is cause actually formating the card would take a long time and is usually unnecessary.
to be honest i think its gone and dont have time to stress to much about it, if im knocked out because of it oh well.
Re: The Official End of Year Build Off Entry Thread.
Here is my ghetto fabulous entry. The challenge was put to me by a builder to build a garbage board for the contest. Nothing else guide wise, just incorporate garbage into the build to show a little creative thought. So here is what we came up with. Unfortunately, we were so excited to take the board out that we forgot to snap the pic, so we set it back in the press afterward for this pic. The layup is alternating layers of Baltic Birch and 12 ounce biax fiberglass in between the layers and a layer of kevlar next to the bottom layer as well as in the middle. West System 105 resin and the special coating hardener were used. The press bottom is a scrap piece of plywood. On the edges of that plywood, we made rails out of 1/4" thick pieces off 1" pine trim. That gives the side profile and the concave to the board. The center piece is a scrap of 1x6 that was cut down, and had the edges routed to make the transition easier. This makes the center pocket for your feet. The ends where the trucks mount had 2 pieces of 5/8" plywood cut into blocks and stacked up, to give an initial drop of 1 1/4" . The blue recycle bin was used to make this a green build, and was filled with rainwater collected off the downspouts. (Actually we used a garden hose, but it sounded good ! )
Here is a picture of the bottom layer being laid up with the carbon fiber. The CF is laid up on top of a sheet of baltic birch, covered by a sheet of plastic and then put into the press with a layer of very thick plastic below it, and then another sheet of baltic birch below that to make the contours or a sandwich of sorts so as to get a fairly smooth surface on the cf. This is something that anyone can do, no fancy vacuum bags or autoclaves or decompression chambers needed. Just sheer ghetto fabulous engineering.
After the board comes out of the press the design is traced onto the board. In this case, we went to an appliance store and got a large piece of cardboard from a refrigerator box, and used that to make a full sized template. We ended up cutting the template into pieces to fit onto the board easier, next time we will use a piece of heavy butcher paper or other scraps of newsprint from the end of a roll.
Here is a shot on the inside showing the contour and center foot area of the board.
Another contour shot
The edges of the board were colored red by using the berries off this tree in the neighbrs yard. Dont know what they are, but we crushed them up in a cup and added some denatured alcohol as a base. Several coats later the edges were a nice red color.
Re: The Official End of Year Build Off Entry Thread.
Alright I'm locking this thread up.
Thanks for all the entries. I'll get the poll up later tonight when I have the time. Same goes for sending out those PM for the builders to vote.
Thanks to all that posted your words of support to me. My Grandfathers passing was quick and unexpected but in the end a mercy. Thanks for the kind words and for your patience.
__________________
Too many Potters in the World and not enough Baileys.
Re: The Official End of Year Build Off Entry Thread.
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