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  #61  
Old 15-08-2007, 04:52 PM
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Looks like the mirror sling?

Wow great progress, looking better and better all the time.
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  #62  
Old 15-08-2007, 07:14 PM
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Thanks for the comments guys.
The wire is for the sling for the mirror it is tensioned a bit to keep it in place.
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  #63  
Old 16-08-2007, 12:06 AM
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Looking great Ed ..low profile and no ladders ..would a child or someone in a chair have a shot at a fair view through this one ?
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  #64  
Old 16-08-2007, 07:29 AM
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Quote:
Originally Posted by nightstalker View Post
would a child or someone in a chair have a shot at a fair view through this one ?
A child yes but a person that is wheelchair bound no.

I have a small platform that I use with my 18" and the kids hop on that without a problem to reach the eyepiece. Depending on how low the object is that you are observing, some observing can be done sitting on a stool.

If you were to build a large aperture telescope for wheelchair bound people the Nasmyth design can easily lend itself to that by allowing the focuser to be positioned further down the telescope.
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  #65  
Old 16-08-2007, 09:52 PM
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Looks fantastic Ed, you certainly have some enviable skills!

BTW: When are you taking orders ?
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  #66  
Old 17-08-2007, 09:10 AM
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Thanks Norm,

No orders but you never know in years to come...
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  #67  
Old 19-08-2007, 09:03 PM
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The box is stained with a few coats of Polyurethane.
I need to spray the inside black, bolt the truss connectors on and put the cell in.

Next step rocker box.
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  #68  
Old 24-08-2007, 06:12 PM
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Looking really nice Ed.

Cheers,
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  #69  
Old 24-08-2007, 08:20 PM
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Thanks Ian, I hope to do some work on the rocker box this week end.
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  #70  
Old 07-09-2007, 07:19 AM
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Quote:
Originally Posted by Orion View Post
Progress report. Finished the second ring and focuser board.
how long did you leave the focuser board to set. I see you have used to
layers of 3mm? ply. has it kept it's shape well?

I am in the middle of making my curved focuser board. But found the ply
in my case 3mm a bit hard to form the curve I need. So I opted for veneer
it's been clamped for a couple of days now, since it has been pretty wet
up here I've decided to leave it like that for a few days more.

One thing I hadn't thought of that I see in the design of your mould is using
ply to line the mould. I have used 6 blocks cut from 5"x1" hardwood. although
the surface is fairly square it isn't perfect.

regards,CS
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Last edited by CoombellKid; 07-09-2007 at 07:47 AM.
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  #71  
Old 07-09-2007, 09:23 AM
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Hi Rob,
I left it clamped for three days and it has kept it's shape very well.

I soaked the ply in water for a little bit before I laminated them together.
The thing is that the outside diameter of my board is 600mm and it didn't need that much bending.
If I had to make a smaller dia board I would do it with the veneer as you have, I think it's going to turn out great.

I used ply to line the mould because the bend that I needed wasn't extreme.
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  #72  
Old 07-09-2007, 09:28 AM
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Finished mirror box.
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  #73  
Old 07-09-2007, 02:31 PM
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Quote:
Originally Posted by Orion View Post
Finished mirror box.
Eddie, that coffee table looks like a winner!!!

so , when do you install the legs? Does it have an internal light?? JK

cant wait to see the final product

is the mirror and secondary completed for this yet?
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  #74  
Old 07-09-2007, 06:03 PM
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Quote:
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is the mirror and secondary completed for this yet?
No Houghy, the optics is the slowest part of all.
With a full time job and demands from my family the little time I have left I use up on the telescope, things like this take some time and like I said I'm in no rush plus when I'm finished I'll only start another project up (It's a hobby).

Last edited by Orion; 08-09-2007 at 08:12 PM.
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  #75  
Old 07-09-2007, 06:33 PM
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The outside diameter of my focuser board is 240mm, I'm looking forward
to pulling out of the mold in a few days to see how it turned out.

I'm also looking forward to seeing your complete beasty, looks awesome!!!

regards,CS
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  #76  
Old 08-09-2007, 06:32 PM
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Just picked up this thread, somehow I had missed it, looks fantastic Ed, a real work of art.
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  #77  
Old 08-09-2007, 07:30 PM
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I'm just curious to know how people would rate this thread?
I mean is it a help to most people considering building their own telescope?

I think Ian and Rob might have got something out of it.

Quote:
Originally Posted by acropolite View Post
Just picked up this thread, somehow I had missed it, looks fantastic Ed, a real work of art.
Thanks Phil, you would of had some reading to do
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  #78  
Old 08-09-2007, 07:59 PM
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[quote=Orion;251279]I'm just curious to know how people would rate this thread?
I mean is it a help to most people considering building their own telescope?

I think Ian and Rob might have got something out of it.

Hi Ed,

I haven't posted on this thread but I check it regularly. I think this thread is very useful for me. I have the optics half made for a 14 inch nasmyth cassegrain. So I am watching your progress with great interest. I hope you will continue to keep us updated.

Rod.
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  #79  
Old 08-09-2007, 08:29 PM
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It's good to see that you are building a Nasmyth as well.
Why a Nasmyth?
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  #80  
Old 08-09-2007, 08:31 PM
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Yup! I check in once a day. It was your picture of the focuser board clamp
that gave me the idea to do the same. At the time I was wondering how I
would do it myself. Plus the calibre of your work from your pictures is very
inspiring.

Please keep posting : )

regards,CS
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