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| Home Made Boards (6188 Posts)
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Home Made Boards |
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da playa
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On 4/21/2005 shapeshifter
wrote in from
United States
(198.160.nnn.nnn)
fl: i believe duane's movie plays with quicktime but i guess you know that by now. hope this is pointing to the free player.
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file opening
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On 4/21/2005 duane
wrote in from
United States
(68.15.nnn.nnn)
the latest Quicktime player worked for me
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Duane
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On 4/21/2005
FL
wrote in from
United States
(65.249.nnn.nnn)
Duane , what do I open your file with . Thanks ...FL
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we don't need no stinking frames !
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On 4/21/2005 duane
wrote in from
United States
(68.15.nnn.nnn)
monocoque baby, last saturday, yes that's ours in front
http://members.cox.net/dheyse/alumni_147.mov
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cro maggot
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On 4/21/2005 shapeshifter
wrote in from
United States
(198.160.nnn.nnn)
a guy recently asked asked me about setting him up with a coffin. mind went right to thoughts of carbon skin around a cromo frame. yeah, i'm talking about a skatecar you idiot.
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Tig-Mig conversion
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On 4/20/2005
FL
wrote in from
United States
(65.249.nnn.nnn)
The guy at our local welding shop showed me a kit for converting a 110 volt mig to tig . It uses an air-cooled torch with a valve on the handle to turn the argon on .No fine control though , as it doesn't use a foot pedal . Bout a hundred bucks if your welder already uses shielding gas . You can camber tubing with some blocks of wood and a couple of clamps .Keep whackin' ...FL
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hammer time
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On 4/19/2005 shapeshifter
wrote in from
United States
(24.148.nnn.nnn)
...took three good whacks from a 10 pound sledge at a section of the dissected carbon overbuild to make one of the vertical supports fail.
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freak brother
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On 4/18/2005 shapeshifter
wrote in from
United States
(198.160.nnn.nnn)
cfav came by to try to scrape me from the shop floor the other day so that we can go for a ride. conversation was going strong when he noticed a small piece of the cross section i had extracted from the mostly carbon deck i dissected. his reaction was like freaky...
...guarantee he's never seen that before. not even in his 30 years of skating.
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molding molds
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On 4/16/2005 shapeshifter
wrote in from
United States
(24.148.nnn.nnn)
decided to hold off on the next deck for a couple of days as i work on making a simple mold for clamping. this will help provide for a more consistently uniform layup while taking the all the manual sightings and guess work away. this should easily convert for use with the pneumatic press as soon as we construct that behemoth.
been skating the board i raced in paris, athens and the pharm today as the clamping mold was in the (vacuum) bag. shot it into the lake and couldn't catch up to it in time before it hit the water (9' deep but very cold). i was bummed momentarily but then remembered that the wicked floats - trucks, wheels and all. then it was just a matter of having a friend hold my ankles as i dangled off of the concrete ledge and fished it out of the water... whew!
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fillet 'o deck...
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On 4/14/2005 shapeshifter
wrote in from
United States
(24.148.nnn.nnn)
cut it wide open to expose what was hidden just beneath the skin. turned out exactly as planned. only problem was that we miscalculated the overall rigidity of the corbon in the structure. the internal structure revealed was like a work of art. too bad it couldn't be seen until the deck was destroyed. that and the fact that it only seemed to be made out of wood gave this deck an almost a zen-like quality. now it's just a matter of tuning the amount of composites to attain the desired flex. yeah, i'm totally lovin' it.
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this deck is solid...
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On 4/13/2005 shapeshifter
wrote in from
United States
(198.160.nnn.nnn)
as a rock. not as light as i would like it to be (not as heavy as solid wood) too bad it's about as flexi as an i-beam. think i'll just dissect it to see how true core turned out. just a little bit more than a benjamin's worth of carbon gone to waste.
next attempt will be bamboo and glass. hoping to be done by saturday... monday at the latest.
also scheduled a little trip to the pac rim scouting out through all the tall grass (bamboo). not exactly a trip that anybody can take 'cause they kidnap professionals especially americans for ransom. kind of place to carryin' and still have three guards in tow at all times. be there in the midst of monsoon season already linked up with some industrialist and university for their "technology" associates. still talking almost third world but doubt it's anything like i remember.
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think i got...
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On 4/12/2005 shapeshifter
wrote in from
United States
(24.148.nnn.nnn)
...stiffed
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new board ooo-ah-ooo
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On 4/11/2005 shapeshifter
wrote in from
United States
(198.160.nnn.nnn)
last night cnova and i must have spent about six hours total (including prep) on our latest construction. this doesn't include the four hours in the morning going out to the maxwell st. swap meet... which is actually more like a thieves market, scoping out clamps, a killer helmet, assorted bearings for a cnc project and other odds and ends to use in this and future builds. the difficulty on these last two layups have been attributed to the fact that we've (nor anyone else we are aware of) has ever done this type of construction before.
an accurate description would be that the thickness of the skin isn't consistent all the way around we have it thicker in the middle gradually getting thinner out towards the edges but there it gets a little more than double thick. there are five or more vertical structures running the length of the board evenly spaced out along it's breadth. one special feature is that the top and bottom are somewhat isolated from each other but only to a limited extent. almost all carbon - absolutely no foam. this build took about four days (after hours, 'cause i work too).
did a tap test on the blank this am and things were ringing out solid. decided to leave it clamped up till after work. clamped? you say. afraid so because before our core was cured in place this deck was pretty much a carbon noodle. vacuum at that point would have brought everything in like a prune.
the most unusual feature in this latest creation is that it's not easily discernable from any other wooden deck especially if it weren't for the black line between the external wood grain surfaces. even then there is a sort of optical illusion because the flow of the shape doesn't hint as to exactly what's going on within. the outer skins of bamboo also adds to this effect and really lowers one's expectations. i'm hoping for lightness and some flexibility but in this case as any, i guess i gets what i gots.
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tig
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On 4/9/2005 shapeshifter
wrote in from
United States
(24.148.nnn.nnn)
okay, i stand corrected. guess i woulda found that out if i asked someone before i posted... goes to show that metal's not my thing at the moment. can't say i see it in the near future either.
nice work there by monkeyboy. wrenching out a stiff one. still walkin' the plank i see. that should be great for flat out speed. is it me or is there any concave goin' on?
can't help but wonder just how stiff the next one we make will be. should pop out of the bag monday night. shooting for a medium flex but that's still yet to be seen.
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Sticking CrMo together
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On 4/9/2005
X
wrote in from
United States
(141.156.nnn.nnn)
For welding CrMo, if you don't have Tig, the next best thing is gas welding with an appropriate steel filler rod. Consider that countless aircraft fuselages and sports / racer car chassis have been gas welded from mild steel and CrMo.
Mig works well on mild steel, but the size of the weld pool and lack of appropriate wire yeild less than optimal results on CrMo. Most offset trucks were Mig welded where the links attach to the axles, and the joints were problematic because of joining the mild steel links to the stub of the grade 8 hardened axle.
Also consider brass fillet brazing the joints if you can miter them to a very close fit. Brazing is lots stronger than most people think.
I bought a 110v 180 amp Mig machine when I started doing classic car restoration and race fabrication years ago, and it's super useful. I've had tanks and a torch around forever, and use them a few times every week.
But, I always lusted after Tig, and finally ran into a favorable deal on a Miller SD180 with every possible accessory, and a week later a friend hooked me up with a liquid torch cooler setup.
Now I need 200amp service at the house and a 220 subpanel in the garage.
The more tools you have, the more you have to have....
BTW I got a book "performance welding techniques" published by motorbooks international which has a lot of good information, but the one book everyone NEEDS, is "Engineer to Win" by the late Caroll Smith. Everything you need to know about making anything of of anything, more or less.
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no fancy smancy tig needed
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On 4/9/2005 herbn
wrote in from
United States
(205.188.nnn.nnn)
i don't really think so, i made some parts for a car repairing modifing friend of mine (pimp my ride rpm motors n.j.)they were for tools,spanner wrenches,and i saw them mig welded and then i grinded the welds down and reworked the parts,and i think for holding a cromoly tube frame together for a skate mig would work just fine,i might even buy one or just use gene's for my next set of stroker axles,it looks so easy,like drawing with a pen. As far a shifter looking down on frames for progressive flex patterns try this...you can machine the tubing and or use thin tubing full length and short pieces between the various necessary bridges(clamps) i got some 3/8 ti rod springing up the middle,and there are little dampers from mtb components of the past that would work nicely triangulated in the frame between the hangers, they could dampen the steering and the board flex at the same time. In fact ,thank you ss, i may restart work on that project on monday, i think i can plug the frame and machine hanger clearence into the tubes,no problem. Nothing like staring at a problem sporaticly for three or four years to find an answer or two.
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The latest thing out of the bag
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On 4/9/2005
Geezer-X
wrote in from
United States
(68.239.nnn.nnn)
I needed a GS board to ride in Athens, and I'd been riding planks lately, but wanted less weight and better torsional stiffnes, so I made this little monster. The layup is, top to bottom, 2 plies 8oz bi-directional carbon / 1/16th inch Canadian maple same size as top of core / 3/8 inch 6 pound urethane foam / 1/16th inch Canadian maple / 2 plies carbon.
It was all layed up wet with Poly Epoxy, cured overnight in the bag, then post-cured a few days later at 130* F for about 3 hours.
It's 32 x 8.75 inches, has about 5/16" camber with the crown 10" behind the nose, and it weighs about 29 oz.
It still has nearly all it's camber when I'm in stance on it. I weigh about 215. It is the stiffest deck I've ever ridden, both torsionally and in the Z axis. It pumps OK off the line, but it can make power at screaming speeds.
The sparkly wrench on the bottom makes it go faster..
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we're all in the land of know
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On 4/9/2005 shapeshifter
wrote in from
United States
(24.148.nnn.nnn)
all this fancy talk and we're just stuck in the basement figuring how to make it happen on a rollaway shop bench.
thanks for the texalium info 'cause i'm no materials expert either. the more or less post material was 99% bamboo and the organic cyanide mentioned is actually just nitril. i kinda lied about no carbon because i later realized that the cyanide binds to carbon atoms to form the elastomer. some of this stuff can be relatively expensive but samples can be had for the asking.
from where i stand tig welding chrome moly is not within my capabilities though welders are in the circle of friends who could assist with a project. old world as it may be it can be a considered a higher function for homemade (or is that what you were getting at).
a couple years ago i was resolved to customizing blanks into shapes that fit my style of riding. it wasn't until i tied in w/cnova who has built monocoque f1 racing cars and their engines that we were able to progress to composites. early models were nothing but wooden shapes made in carbon/wood/foam and epoxy. as we delve deeper into composites the evolution of shape has gone past the 90° angles to more curvaceous shapes.
now figuring out things like blowing foam into a molded skin is a bit of a challenge but well within the capable hands of people who don't know how to say "that's impossible!" but what do i know....
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Timber selection
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On 4/9/2005
Fitz
wrote in from
Australia
(203.164.nnn.nnn)
I havn't tried poplar yet. I'm not sure it's even available here. We're a bit limited to the varieties of timber that you guys get, but the whole location thing has alot to do with it. I'd really like to get a hold of some quality rock maple. Its available just soo expensive.
Every year I try and get myself off to the Timber and Working with wood Expo, and the same story keeps coming out. Sad but true, our timbers are becoming harder and harder to find.
Here in Aus we have a hardwood timber called Jarrah. Beautiful darkred with superdense structure. Heavy but reliable strength. Most commonly used in decking floorboards where a clear finish is desired to show natural beauty. A company over here by the name of Bluetang http://www.btskate.com/ handshape these boards from solid and vert laminated timbers. A friend of mine has one and after riding it, got me wanting one. Homemade though of course. It was a 25mm thick solid Jarrah longboard and the tapered rails work a treat giving a softer more flexible rail to really carve it out on. I think shapeshifter mentioned it b4 about tapered rails. It works. :)
Trying to source an affordable solid plank and have a go. Alot of the other more exotic hardwoods we have are sourced from S.E. Asia.
Eucalyptus is another I'd like to try. Utilise our plentyful and much loved gum trees. I understand there's a fair amount of it growing California way.
I like the previously mentioned idea of combining the old with the new. Solid thinned down hardwood backed up with carbon or glass. But, to each their own I guess.
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where am I?
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On 4/9/2005
Fitz
wrote in from
Australia
(203.164.nnn.nnn)
I just thought this was the Home Made Boards forum. Coming from a Toolmaking background and currently doing CAD/CAM design work I've always had a liking for good old solid metal construction. Crude and old style as it may be it is within reach practically and financially, in my case anyway. The in house Pattern Maker helps me out as far as composites go giving tips here and there. He's an easy goin guy and a wealth of practical knowledge.
The blowmoulding technique mentioned before. Is that polymer blow moulding into Texalium or something?
Also the board mentioned in the "more or less" post got me thinking toward some type of nylon perhaps. No master of Material-Engineering by anymeans, just got me curious. Interesting stuff man but maybe the guys who run this site might have to create a new topic where the amatuers like myself can put their posts up.
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shoe fly
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On 4/8/2005 shapeshifter
wrote in from
United States
(198.160.nnn.nnn)
got a couple pairs of crescent moon snowshoes a while back and truth be told similar thoughts of applying the aluminum tube configuration to skateboards happened accrossed my mind.
never went any farther, got nothing against all this but right now we'd rather explore the depths of composites so structures in metal doesn't spark any interest unless blow molding into an aluminum skin is the topic for consideration. the structures that are comprised of welded tubes just doesn't seem to cut it.
would rather contemplate composite shape progressions and modulated core concepts to vary the flex characteristics of the deck. but hey, keep on keepin' on we're all trying to get there from here just indifferent directions.
now that we have a pretty good handle on an approach to passive dampening, the possibility of strategically locating something to provide an adjustable flex was discussed last night. this brought on ideas of graduating to an active dampening system but that's a long ways away. one step at a time...
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skeleton boards
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On 4/8/2005
Fitz
wrote in from
Australia
(203.164.nnn.nnn)
After seeing a few pics from the Revolugen website, I got all inspired to create an all metal standup deck aswell. Rather than round tube rails, I thought I'd go with a rectangular extruded section 50mm x 25mm x 3mm wall section spine down the middle. Support the top plate (riding platform about 5mm) with 25mm x 75mm 3mm thick angle screwed to the sides of spine. All materials to be ally. The rectangle section was lying round at work from after a previous job and at 1.2m long looked perfect for my lil plan. I got 2 bits of wood to simulate trucks and stood on it with all my weight, perfect flex. It'll probably wiegh a ton when I finish it but for a longboard cruiser its fine by me. Ply deck on top may be the go if I can't afford aluminium. Good call FL
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look back
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On 4/7/2005 herbn
wrote in from
United States
(152.163.nnn.nnn)
a little while ago a friend of mine put up pics of my trucks,i think he put the pics on his web page and refered to it in code, comp code might as well be apache to me.
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truck clearance
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On 4/7/2005 FL
wrote in from
United States
(65.249.nnn.nnn)
I started out with 7/8" tubing , but had truck clearance probs . The 3/4" round with tig welded crossmembers worked out o.k. The spacing on the tubes cleared the baseplates so the hanger had some room to move . The beauty of a chassis is your options for deck materials and thickness .I've run everything from .080" aluminum to 1/4" finnish birch ...FL
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foamin' at the mouth
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On 4/7/2005 shapeshifter
wrote in from
United States
(198.160.nnn.nnn)
15 lbs per cu in? damn that's some heavy sh!t. meant 15 lbs per cubic foot density.
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