Printable View
soooo.... this might sound wierd, but what about filling that huge pipe with sand, so that you get the least collapsing when you bed it? that way it will bend totally even over the whole place, and i barely think you will need to rotate it:) it will get some weight into the pipe too, that will help force bend it downwards.
not weird, good idea. i know in trumpet making the use frozen soapy ice water. or so how it's made shows.Quote:
Originally Posted by p0Pe
wouldnt that make the heating very dificult since the water will cool the pipe? sand is way worse at optaining heat.Quote:
Originally Posted by Spawn-Inc
it was done with a tube bender, not heated. like exhausts. then i think once it's put together they put it through a heating cycle but i don't remember that part.Quote:
Originally Posted by p0Pe
Now I want to get in touch, although I didn´t do a lot of the last two weeks, because of a little misunderstanding with the Plexiglas tubes. But at Monday I could hold the tubes in my hand. The tubes are sponsored by KÖNIG Kunststoffe
At first I take a piece of the tube and put it into the oven to test at that temperature the tube is bendable.
The result of the test was that the tube is bendable from 145°C and over 165° emerge bubbles in the Plexiglas. Now some people would ask themselves why I want to know this. Reason of this is that I got a great idea under the shower. The idea was to heat up the sand which I´ll fill into the tube. And this hot sand would warm up the tube very consistent.
During the sand was in the oven I tested my spin mechanism with the cold tube and made some photos of it.
Before I put the hot sand into the tube I inserted a fabric tube into the Plexiglas tube. So the sand wouldn´t contact the Plexiglas tube and don´t scratch it. This fabric tube I sewed before two weeks.
Well and now the series of mishaps started. Unfortunately I haven´t no pictures of it, because I was alone at the shop. But I´ll try to explain it with words, if I´ll be successful I don´t know.
At first I fill the sand into the red fabric tube that was into the Plexiglas tube by the help of a funnel. That works relative good, but at the end a little bit sand flowed between the fabric tube and the Plexiglas tube, because I pour in too much sand into the funnel (mishap #1)
Ready with this I screwed down the tube and inserted it in the spin mechanism. Thereby I noticed the tube was a little bit bend. This wasn´t good at this moment, because the tube had an unbalance by the time of rotation. After some seconds the Lego gear were destroyed as result of the unbalance (mishap #2)
Well now I had to rotate the tube with the hand at this I noticed the tube had to grind at two sites, because at this sites were scratches around the tube (mishap #3)
After 5 minutes I had the feeling that the tube is ready to bend. I took it at one site out of the mounting and try to bend it. Unfortunately the tube wasn´t at one end and at a site in the middle smooth enough for bending, so the tube got a little kink at the middle (mishap #4)
The one end I had heat up again with the hot air blower that I hold in the one hand, and with the other hand I hold the tube that it could slide down. Because of this I hadn´t another hand for bending the tube and took my foot. The problem was, that I haven´t such a sensitivity in my foot. I put too much pressure onto the tube and the seal break away from the tube. So the sand flowed out of the tube (mishap #5)
How you could see nearly all went wrong. At the following picture you could see how it looks at the end
And so looks the tube after I released all the sand of the Plexiglas tube
In my opinion the result isn´t really miserable, but I don´t like the kink and the scratches.
So I´ll try it once again in the hope that the next tube won´t have a kink and scratches. Certainly I´ll change some things.
The greatest modification is that I won´t use the spin mechanism again, because I won´t need it. I´ll heat up the tube at ca. 100°C with the hot air blower. After this I´ll fill in sand that is 175°C hot. And so the tube and the sand will be 155°C hot, and this temperature is enough to bend the tube.
In the hope that I´ll a get a great bend tube with my next try I´ll start with the Styrodur from this weekend.
Moreover I have some „Hardware-News“. Instead of the Aqaustream pump I´ll use a
Desweiteren gibt es noch ein paar „Hardware-News“. Statt der eigentlich geplanten Aquastream DDC pump taht I get from Laing. Besides I´ll get from OCZa Vertex 60GB SSD that will I use as for the OS. I also get support from Dremel and highly likely from Aquatuning.
Well and now I haven´t to write anything. But if you have questions please ask me and I´ll try to give you an answer. Moreover I would be happy about suggestions and criticism
You are a mad man!! I love seeing ingenuity at work.
I think you did really good for a first run at it. I know if it were me I would have a flat kinked up tube and 3rd degree burns. :P
Looking forward to seeing how you make out on your next run, I know this is going to be a great build!
How I promised you I try to bend the Plexiglas tube again. I did all how I described in my last update and so looks the tube directly after the bend process
Than the sand was cold I let it drain out…
…and refill it with hot sand.
So looks the bend tube without the orange fabric hose.
After this I cleaned the tube with water to make some more pictures of it.
To protect the tube from scratches I swathed i tat first with stretch leaf and then with crepe tape
Well unfortunately I haven´t no more news from the build. Certainly there are two new “hardware news”. On the one hand I´ll use these compact black nickel fittings that I´ll from aquatuning. Moreover the T-Balancer will be employed to see the temperatures and the flow rate at the desktop.
After I bended the tube more or less good I could start with the positive form of the sail. For this I built at first a Styrodur cutter/thermo saw. Certainly the saw didn´t work at the beginning. I planned to use a 20W transformer, but this worked only 5 minutes. Fortunately I had another transformer with 160W at home and also some 2.5 ohm resistive wire.
Ready with it I could start with cutting the Styrodur into shape. For this I made at first 3 stencils (bottom, back, side)
Now I started with cutting the 3 pieces into shape
To get a better imagination of the size I put it near the Sine curve
I know that I will be a really big PC and that it´s possible to make it a little smaller, but more than 10% smaller isn´t possible. And if I´ll make it 10% smaller I would get at some sites space problems maybe. So I decided to make it rather a little bit bigger before I get into trouble with the space.
Ready with the “base frame“ I filled one site with Styrodur, for the other site I had no more time, but I´ll try to fill the other site tomorrow evening
@all: How could I change the title of the project log???
To change the title, edit the subject line original post.
You win some reputation, good sir. Very ambitious project, and it seems to be coming along quite well.
Nice Hotwire setup!
I can change the title for you, just PM me what you would like me to change it to.
Also since this is an active ongoing mod, I think we should move it to the Works In Progress section. I will move it after I receive your PM.
