"I guess I'll give you guys a little while. I've been really busy, no time to list out all the suggestions. I'll get them all down soon.
Originally Posted by Tex202 is aka
Twig, Twiggy, The Twiginator, Twigingston, Count Twigula, Sgt. Twig P. Morris, and Ribby.
"Philosophy usually consists of one philosopher arguing that all the others are jackasses, he usually proves this, but in doing so proving that he is one himself." - Henry Mencken
Thats right. 3DM Avalon in red. The best old looking wheel i found. I measured them and they all have 78a.
Too brittle? don't know, have to ask my brother about that, because i know nothing about fiberglass.
In my 5km-test it felt very durable under my weight.
@GPymp: Will write you a email when I'm not that busy like now.
Im very interested in milling my own trucks for ldp/cruising/slalom, but correct me if i am wrong, dont the trucks feel too stable becasue of the such low pivot angle??Maybe the spherical bearings makes up for this?Also any idea what the fibreglass layup was, is it bilateral, trilateral, unidirectional a combination of these ...etc Again, very very nice board.
Im very interested in milling my own trucks for ldp/cruising/slalom, but correct me if i am wrong, dont the trucks feel too stable becasue of the such low pivot angle??Maybe the spherical bearings makes up for this?Also any idea what the fibreglass layup was, is it bilateral, trilateral, unidirectional a combination of these ...etc Again, very very nice board.
They have a very low pivot angle, but the board itself has a very short wheelbase (62 cm). With a longer wheelbase the front truck would be to flat.
The hanger is also in his "unflipped" position like on a randal r2 and the hence resulting leverage and the resulting bad caster makes it additional easier to turn.
Talked to my brother and now i can say more to some points.
He told me, that it's not to brittle and as brittle like with a wood core. You can theoretically jump on the board till it bends down to the ground and it will not break.
The fiberglass layup is a symmetrical construction. The middle 4mm are made with some thick diagonal fiberglass to build a core and it's effectively like a wood core of other decks. Then there are some layers unidirectional sheets, covered with a fine sheet for the finish. He took all the fiberglass he had laying around in the workshop and could not remember how he made it exactly.
The deck is 7mm thick with a fiberglass weight of 60% (the rest is the epoxy resin)
With hand-laminating you can only reach something like 35%. Impossible to create the board in this way (hand-laminated) (and to be only 7mm thick). With the vacuum infusion method he was able to made both sides glossy direct out of the vacuum bag, like you can see it in the pictures. No surface treatment procedure were done or is needed.
The machining time of the trucks took ca. 40 hour. The baseplates took the most times, followed by the kingpins.
So to pick up Cranks calculation, one truck will cost 70$ * 20 hour = 1400$ (per truck)
We are sure that other trucks (especially the prototypes) were much more expensive. Just imagine to build a seismic manually.
Originally Posted by Mister Surly
What a cool build. Everything made from the ground, up ... well done.
They have a very low pivot angle, but the board itself has a very short wheelbase (62 cm). With a longer wheelbase the front truck would be to flat.
The hanger is also in his "unflipped" position like on a randal r2 and the hence resulting leverage and the resulting bad caster makes it additional easier to turn.
Talked to my brother and now i can say more to some points.
He told me, that it's not to brittle and as brittle like with a wood core. You can theoretically jump on the board till it bends down to the ground and it will not break.
The fiberglass layup is a symmetrical construction. The middle 4mm are made with some thick diagonal fiberglass to build a core and it's effectively like a wood core of other decks. Then there are some layers unidirectional sheets, covered with a fine sheet for the finish. He took all the fiberglass he had laying around in the workshop and could not remember how he made it exactly.
The deck is 7mm thick with a fiberglass weight of 60% (the rest is the epoxy resin)
With hand-laminating you can only reach something like 35%. Impossible to create the board in this way (hand-laminated) (and to be only 7mm thick). With the vacuum infusion method he was able to made both sides glossy direct out of the vacuum bag, like you can see it in the pictures. No surface treatment procedure were done or is needed.
The machining time of the trucks took ca. 40 hour. The baseplates took the most times, followed by the kingpins.
So to pick up Cranks calculation, one truck will cost 70$ * 20 hour = 1400$ (per truck)
We are sure that other trucks (especially the prototypes) were much more expensive. Just imagine to build a seismic manually.
Wheels are also possible.
Its time to learn Chinese and have them made there, just like most of the trucks bing made now. Holey's, Paris, Force etc.
i have researched into this GREATLY.... if you find a way to get your hands on some urethane, contact me right away!! Plus I have some links/ideas to share if you end up making wheels too.
Last edited by ryanredbaron; 10-17-2007 at 09:46 PM.
Its time to learn Chinese and have them made there, just like most of the trucks bing made now. Holey's, Paris, Force etc.
HAHA, thats true, but we have the good old babelfish and language difficulties should be no problem anymore.
In my quick-calculation i completely forgot the material costs, which were another 20$ for the maintenance-free spherical bearings and 20$ for the rest
70$ * 20 hour + 40$ = 1440$ (per truck)
ryanredbaron, there is a company at the further end of the city I'm living, where you can buy custom made PUR. There I should definitive stop the next time I'm passing (not that often) and ask for a sample.
ryanredbaron, there is a company at the further end of the city I'm living, where you can buy custom made PUR. There I should definitive stop the next time I'm passing (not that often) and ask for a sample.
Would PUR work? I think that they use TPU.... man i suck at technical jargin...
If they gave you a good sample, do you think they would sell you the actual mixing agents to make the wheels? (VERY TOXIC STUFF)
Would PUR work? I think that they use TPU.... man i suck at technical jargin...
If they gave you a good sample, do you think they would sell you the actual mixing agents to make the wheels? (VERY TOXIC STUFF)
HaHa, i think, you are the man, because I'm a total wheel building noob and they only wrote something about PUR and nothing about TPU on their website and anything about custom made changes on a related note. I'm sure, when i asked them that i will make my own skateboard-wheels as a school project, they gonna tell me to go away or will give me the right stuff. Maybe it's only a stupid idea and i blame myself by writing or doing this.
Back to topic:
He took all the fiberglass he had laying around in the workshop and could not remember how he made it exactly
I asked him again and he remembered exactly how he made it, but he will keep it as his secret, because it took him a long time to calculate the flex he wanted to have.
The first thing he did was a small sample with nearly 5.5mm thickness, which was a pure try and error sample and from there he calculated, how it should be with 7mm (somehow or other).
I am currently also in the procces of upgrading my mill to a cnc. And making a onw hangar. So I have a question: Which alu alloy was used by your brother for the truck? Most stores here ( rotterdam,holland) don't have high grade milling alloy, more the moderate stuff. ( which is actually ment to be extruded)
And about the urethane. There is some urethane which is sold in our neigbourhood. I'm trying to make a workabe wheel out of it with alu (lathe) core's.
And For your brothers conversion to cnc, I have found some opensource stuff for it, software, regulators, driver hardware, etc.
I am currently also in the procces of upgrading my mill to a cnc. And making a onw hangar. So I have a question: Which alu alloy was used by your brother for the truck? Most stores here ( rotterdam,holland) don't have high grade milling alloy, more the moderate stuff. ( which is actually ment to be extruded)
And about the urethane. There is some urethane which is sold in our neigbourhood. I'm trying to make a workabe wheel out of it with alu (lathe) core's.
And For your brothers conversion to cnc, I have found some opensource stuff for it, software, regulators, driver hardware, etc.
Sorry to say, but he don't know what he used. Something that was laying around in our workshop. Maybe AlMg5.
About the urethane and wheel keep us informed in the thread, ryanredbaron posted !!!
He will do the conversation as a school project and will buy the driver hardware from a commercial retailer. I will support him there and it should be a commercial product to be sure it will work proper and just in time. I build the controller for our other router, but do not have the time to build another one.
As controller software we will use EMC.
Thanks for your offering about the software. If you wish to share, feel free to post some links.
As for the wheels, my brother and I visited the Euromold last year and made some nice contacts. It was not that difficult, to get in contact with BASF, BAYER, and some other smaller PU chemical companies.
We got some nice informations about the available pu-systems and how all that pouring-#### works. One company, we got in contact with, do sound very promising and would like to support us. They do have other customers from the German inlineskate-scene and skateboard-scene, so they do have experiences in the given niche.
It was every time funny, to watch the faces of the exhibitor, when we pulled out a huge 92mm Flywheel and told them, that we will make this by our own.
The main part at the Euromold was for the milling and routing related companies. Mills, so big, that you can mill a car within. Or that fast, impossible to follow with your eyes.
As a hobbyist it was just awesome to be there, even when we were the only people without a suit. It was definitive worth the visit and the entrance money.
@GPump, it was also easy to get in contact with Chinese companies for all conceivable jobs.
@ryanredbaron: there are better things than TPU. It's difficult to manufacture, because you need a die casting machine with a extruder and you have to check and regulate pu-temperatures for every working process. Cold-pour-systems are better for our purposes.
(I hope, i didn't tell ####, because I'm still a noob)
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Re: retro looking board (100% fiberglass) + selfmade trucks (manually milled) for LDP
Originally Posted by sloweyefasthand
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don't know, have to ask my brother about that, because i know nothing about fiberglass.
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