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      Laurent


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      Post #10838, posted on 05-22-2006 GMT-5 hours    
      Hi all,

      With this talk about the Il-86 inlet guide vanes and fan blades I designed them on my computer and came out with this (click on thumbnail to enlarge):



      Now I want to get it produced, but these tiny parts cannot be casted in resin. I am considering supplying the actual stereolithography parts. I don't know how they will come out in stereolithography, and would like to try. I need six committed volunteers for this. If the objects do not come out well and I cannot deliver, then the cost will be my own loss. If the objects do come out nicely I will charge 15 euros for each set of 4, postage included. I know it's not cheap but that's the price of stereolithography and I will not make any profit on this, at least this time.

      What do you think?

      Cheers,

      Laurent

      So many planes, so little time ...

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      Caravellarella


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      Post #10839, posted on 05-22-2006 GMT-5 hours    
      Oooooooooooooo, he's so clever is our Laurent...........

      Terry, (Caravellarella).

      Because L’ORÉAL keeps telling me I’m worth it..........

      Or maybe it’s MAYBELLINE...............

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      skippiebg


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      Post #10842, posted on 05-22-2006 GMT-5 hours    
      Way to go, Laurent! I applaud! It's going to be a first-ever for you and many will follow. You may consider doing hte turbine tail fairing which Rick Wallach said looked as if it had been detailed with a fine nozzle from a cake decorating kit

      Will I buy? Let me have a look at the kit (haven't seen it yet).

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      skippiebg


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      Post #10844, posted on 05-22-2006 GMT-5 hours    
      Actually, yes, count me in! I read some of the posts and the kit needs these parts. I look forward to hearing from you on payment, et c.

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      Laurent


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      Post #10845, posted on 05-22-2006 GMT-5 hours    
      Thank you Skippiebg. You are the third volunteer! But I will not ask you to pay anything until I have the parts in my hands and am happy with them.

      Just as a reminder, here is a picture of the real thing: http://koch.jino-net.ru/index.php?showimage=32

      I haven't received the kit either - it will be easy to scale the part when I receive it - and I don't know what Rick meant about the turbine tail fairing, but if it is an extra part it means a higher cost.

      Stereolithography is expensive, so for large parts I only use it to make my masters which I duplicate in resin. But for small complex parts (undercarriage legs, engine details etc...) it might be suitable. This project will tell!

      Cheers,

      Laurent

      So many planes, so little time ...

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      Jennings


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      Post #10849, posted on 05-22-2006 GMT-5 hours    
      How come it couldn't be cast in resin? I've seen far more complicated things cast than that! Have a go at it... I'll take two sets please

      J

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      Laurent


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      Post #10851, posted on 05-22-2006 GMT-5 hours    
      Hi Jennings,

      The inlet guide vanes would prevent the part from being extracted from the mould, unless you provide cuts to take the part out, but they would create flash in a place where it is not easy to remove, and the mould would be likely to get worn very quickly.

      Also, complex parts are prone to trapping bubbles.

      I really want to find out if stereolithography is a good alternative for some of the parts; undercarriage legs for example. White metal fails to capture some of the details and resin is too soft. Stereolithography is strong and shows the details well, and it's surface is now smooth enough for model parts.

      Finally, I don't really enjoy casting resin, it is a slow and dirty process, so... why not trying another method?

      Cheers,

      Laurent

      So many planes, so little time ...

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      skippiebg


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      Post #10853, posted on 05-22-2006 GMT-5 hours    
      Stereolitho (or rapid prototyping, of which it is part) is the way to go. Moore's law states that computer power doubles every 18 months, or conversely that cost halves every 18 months. At this rate, a an STL item costing USD 1000 today would come to USD 150 in ten years' time.

      Remember 10 years ago? Minicraft was releasing its 737s... Not so long ago, eh?

      In 20 years' time, the same item would be USD 23 -- the same cost as a kit.

      Remember 20 years ago? Welsh Models was getting into its stride.

      So whoever gets into STL now ploughs a furrow for the future; I am certain of it!

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      Laurent


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      Post #10854, posted on 05-22-2006 GMT-5 hours    
      6 people volunteered already, thank you!

      Cheers,

      Laurent

      So many planes, so little time ...

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      Jennings


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      Post #10855, posted on 05-22-2006 GMT-5 hours    
      What if the IGV was cast as a separate pice with the front of the bullet fairing? Just drop it in place on the fan and there you are. I admit, I know very little about STL. What substance is the final product made of? I thought it was a type of resin...

      In any event, put me down for two sets please

      J

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      Laurent


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      Post #10856, posted on 05-22-2006 GMT-5 hours    
      Hi Jennings,

      The substance is hard to describe. I have only seen it as a finished product. It is a sort of wax. The "3D printer" builds up the object by accumulating droplets of this wax where the computer tells it to do so. Once "cured" it is a very hard vitreous substance.

      Cheers,

      Laurent

      So many planes, so little time ...

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      vc-10


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      Post #10857, posted on 05-22-2006 GMT-5 hours    
      How about etched Brass for the fan? The Stator blades might be harder, but the main fan is easy enough.

      On the go:
      Heller 1.72 Connie Pan Am
      Revell 1.144 767 &747-400 BA
      Zvesda 1.144 Il-86 Aeroflot

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      super_marcy


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      Post #10869, posted on 05-23-2006 GMT-5 hours    
      I would take one set too.

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      Luca


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      Post #10915, posted on 05-25-2006 GMT-5 hours    
      Quote
      Laurent :
      The "3D printer" builds up the object by accumulating droplets of this wax where the computer tells it to do so. Once "cured" it is a very hard vitreous substance.




      Hello Laurent.
      The device you described looks like those used in jewelry and in dental protheses prototyping.
      Do you happen to know the type or brand of the 3D printer used by your service? Maybe "Solidscape"?

      Luca
      LIN

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      Laurent


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      Post #10918, posted on 05-26-2006 GMT-5 hours    
      Hi Luca,

      I don't know the brand (a company does it for me, I haven't got this €50,000 machine at home) but you're right, dentists and jewellers also use this technology.

      Cheers,

      Laurent

      So many planes, so little time ...