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Building/printing Hubble telescope scale 1:7 (finished!)


Chriske

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Next step : making of the telescope-compartment

Because I had no barrel of the correct size I had to use a couple of these. In the picture the already were cannibalised (two terras-heaters). Needless to say my lovely wife and my neighbours wife were not happy when they saw these two lying on the ground, taped together...🤭

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Because of the smaller diameter it was very difficult to bend this 420mm 'telescope'.
In an earlier life we used to make our telescope-tubes this way. They were very strong....anyway...

This is the result :

HST-019.jpg.1bc64b15954fc840585d71fd9dd3dabe.jpg

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Coming on nicely Chris.  :thumbsup:

I could print the telescope compartment on my Giant printer (if I had the Giant printer working 🤣).

Edited by Gina
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OK - in two sections bolted together...  I can't see me building a printer capable of 1.2m height.  But then again, you never know with me!!

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The back-attributes mounted on a 600mm paper 'mould'.
I took a snapshot of that back and printed it on a piece of paper so I can see where exactly all these lower parts should be mounted.

All wiring and tubes will be added when all these parts are mounted onto the wooden surface.

HST-021.jpg.ab9dd0bc2ab781c5dcf91fe20c0001e2.jpg

 

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Drawing saw-patterns on plywood.  Planning to make a light, yet strong inner framework.

This is what it will look like. I printed rather thick rings to connect all wood disks with aluminium poles.

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  • 2 weeks later...

Aluminium delivery this morning, 6 meter long poles and profiles

HST-028.jpg.20e7e0962ffb5e0da0dfdc28ed8bd22e.jpg

Printed connectors.
The holes were printed a bit to small. All of them were enlarged in my lathe  just a little bit so the 30mm poles fit in perfectly, no play at  all.

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In the picture above HST is not yet at full height. When finished it will be 2.41m long.
I made it all as light as possible. 12mm plywood. As seen on the picture it's weight is only 9.6kg. I expect the complete HST will weigh between 15 to  20kg.
The printed parts(grey and red) are to connect the aluminium poles with the wooden disks.
That thing is incredible stiff...

more to come...

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amazing watching a true craftsman produce something like this (not to mention your other projects!) and seamlessly working on different material types not blinking an eye. Pretty sure if I'd tried what you've done so far the wood sheets would have snapped along the bend and this inner structure would be leaning to one side as I built up to the top!

Part of me is wondering if you couldn't fit a real reflector system and EEVA inside it and then be able to articulate the model to point at different objects and display what it sees. Would likely blow away the minds of those coming to see it :) 

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Thanks for the kind words.
Bending these sheets is not that difficult you know. You only need to know when to stop adding water, it needs to be soaking wet bed not to wet. Adding to much, to long water the sheets fall apart. As a matter of fact it  has (about) the same composition as particle board.
In a earlier life, a long, long time ago(during course) we used to make our telescope tubes this way. These tubes were very hard, very stiff, and very cheap. Depending on the focal length and diameter of the scopes we made 1 to 3 telescope-tubes out of one single sheet. Cost for 1 sheet 6.5€ (these days).
Later on we started using trusses.

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And yes, it would be possible to add a optical system in that scope. But it would not be practical to use that scope with all these parts sticking out of it's hull..😁

But maybe, just maybe, if an optical system would be present, I could contact someone who could launch that Mini-HST into a low orbit.  That would be cool, not...??..🚀

Just kidding,
tempting...
No no, just kidding...🤗

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The first picture is taken at an angle so the reflection of the sky made that panel looking blue.
In real the same does also occur. Sometimes we see pictures HST looking completely black, on another occasion we see HST look blue-ish/white, and sometimes we see different colours.
There too it all has to do with the position of the camera.
When it looks black we see reflection of the night-sky, Blue/white is reflection of the earth, and when difference colours are visible, we see reflection of the Shuttle's parts.

In real HST looks like this

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829408944_8913467medium.thumb.jpg.30f1b2c611a78697f82dfd750492960a.jpg

 

And in orbit we see this:

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or this :

Here we see reflection of the night-sky and Shuttle itself.

1972793776_sts061-48-001medium.thumb.jpg.a17e434568dc7b0805d298ba5896f36c.jpg

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