JWST model -scale 1:7-

[Chriske]

And while we're busy drawing and printing SaturnV parts, I have some spare time at hand so I started building JWST, same scale as HST I made a few years back(1:7). In this project there are (almost) no printed parts.
JWST will be 3m long and  2m wide. The primary mirror will be almost 1m diameter.  Lucky me these hexagonal mirror are for sale, they have a 'golden' reflection layer and on top of it they do have the correct size for this model.

The only printed parts for this project are the primary mirror holders. These holders have different angles to simulate the curve of that 1m mirror.

For testing I use regular mirrors to avoid scratches. When all is done I'll glue the 'golden' one in place.

[Chriske]

Busy assembling JWST primary mirror.

[tomato]

Looks brilliant, very impressive rate of progress, you should be on the 1:1 scale project.👍

[rwillett]

That looks great, how much filament will you go through?

Will it actually work?

Rob

[Chriske]

19 hours ago, tomato said:

Looks brilliant, very impressive rate of progress, you should be on the 1:1 scale project.👍

To late, JWST will be launched next month...😁

[tomato]

Just now, Chriske said:

To late, JWST will be launched next month...😁

I agree it does finally look to be happening, December now I think.

Boy, there won’t half  be some clenched cheeks around on that day, let’s hope it all deploys as it should, no hope of a repair mission this time.

[Chriske]

11 hours ago, rwillett said:

That looks great, how much filament will you go through?

Will it actually work?

Rob

Will it work...? Well, I do not know yet, just like its big brother it needs lots of testing..😉😁
Compared to the other rocket projects I've posted here there's not to much printing involved this time. The mirror supports a few minor parts will be printed. The rest is plywood, aluminium poles, some steel cables and the mylar sheets.

[rwillett]

Please keep us up to date. I love this sort of stuff and I know I should be working, but I'd much rather follow this down I run my own business so it's my decision really

Thanks

Rob

[Chriske]

Hold your horses Rob...!..😳

This thing will never work, it was never intended to do so.
It's only a 1:7 scale model to be added to the rest of the models in our local observatory. The mirrors are flats. I was lucky that the set hex. IKEA mirrors are exactly the size I needed. They come in a set of 5 'aluminium' + 5 'goldisch' coating. So in the end I'll end up with 20 alu hex. mirrors. with no purpose.

[gazza25]

awesome 

[Ian Thrax]

Brilliant project, more pictures pleases👍

[Chriske]

Still at it...
ETL maybe next week...

 

[Chriske]

Busy assembling all parts. I hope to hang it on the ceiling by end of next week.

Telescope nearly done. Only secondary mirror to glue into into its holder.

 

 

Edited December 3, 2021 by Chriske

[Chriske]

This one is almost finished also. It needs the large protective shields to have it done. It is the largest part of JWST. When finished it measures 3x2 meter. The real thing is 20x14 meter...😳
This is how it looks like inside. When it is all done a thick 50mm pole will be mounted through both parts, the telescope part and this one. That pole hold it all together.
One of the holes for that pole is visible at the bottom side of this part.

 

[Chriske]

ETL will be Thursday afternoon next week btw...😉
No delays are expected so far...😀

[maw lod qan]

Another amazing project!

Well done!

[Piero]

Wow! This is a great project and is coming out really well! 

Congratulations! Looking forward to seeing how it evolves! 

[wimvb]

On 21/10/2021 at 14:51, Chriske said:

Hold your horses Rob...!..😳

This thing will never work, it was never intended to do so.
It's only a 1:7 scale model to be added to the rest of the models in our local observatory. The mirrors are flats. I was lucky that the set hex. IKEA mirrors are exactly the size I needed. They come in a set of 5 'aluminium' + 5 'goldisch' coating. So in the end I'll end up with 20 alu hex. mirrors. with no purpose.

I once read about a lad who had glued small pieces of a flat mirror to the inside of a satellite dish. He stored it in (his parents') garden shed. Which burned down one sunny day ...

Mind where you point that model on a sunny day. 🙂

[Chriske]

Of course I did not made these large sunshields the same way as the real thing. I had to come up with something completely different. I had to stretch a thin steel cable around bolts and used a selfmade cable tensioner. This is what I came up with.

 

 

[Chriske]

No 'launch' yesterday due to some problems with the large solars screens. Most probably it will be launched early next week.

[UKDiver]

34 minutes ago, Chriske said:

No 'launch' yesterday due to some problems with the large solars screens. Most probably it will be launched early next week.

Totally in keeping with the original. I'm looking forward to deployment.

[Chriske]

...still at it...

Had lots of problems(the same as my NASA colleagues...🤣) with the solarshields. But the last version seems to work.
With a bit of luck ours will be hung next Wednesday.

Fingers crossed...

[Chriske]

Today JW will be fully assembled for the first time, but will not be hung as planned.
It will be placed on top of a table instead. Our astronautics specialist will make short clips and add comments about JWST and use these clips during Urania livestream when the real JW is launched.
Most probably our JW will finale be hung in our planetarium next week.

[Chriske]

I wonder, are there other JWST scale models built by amateurs...?

[Chriske]

Almost done, ok for the clips to make, but some minor things to do before completely done..