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  #21  
Old 18-01-2020, 04:37 PM
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Joshua Bunn (Joshua)
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Hey Mike.


You and Steve could make a trip over one day
Do you mean the base plates seam under engineered compared to the pier at the top?
It's made out of mild steel, nothing special.
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  #22  
Old 18-01-2020, 05:43 PM
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Quote:
Originally Posted by Joshua Bunn View Post
Hey Mike.


You and Steve could make a trip over one day
Do you mean the base plates seam under engineered compared to the pier at the top?
It's made out of mild steel, nothing special.
Love to!

Yeah, just looked like the plates and bolt thread used to connect direct to the footings appeared a little under sized/strong..? As I said, I am not an expert but looking at the mass of the top of the tower + the massive pier interface and then the mount and telescope on top, I was thinking perhaps the interface between the RHS and each footing might benefit from an upgrade..? Just musings, you are clearly a master metal fabricator...and I probably just have that 16" Astrograph in Nambia on my mind

Mike
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  #23  
Old 18-01-2020, 05:52 PM
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I do admit, the top is quite large, but I'm not sure how big a foot print an equatorial fork mount capable of carying a 24" scope is, so I think this should cover it.
Those bolts for the baseplate (being high tensile) will have a breaking strain of many tonnes for each bolt. And the interface between the baseplate and 100 x 100 x 3mm RHS is not going to tear. 400mm of strong weld on each leg, it's all good
It's not like there is much force on it.

I had it up, as you can see in the pictures, I climbed to the top (it was only on 3 legs cause of the uneven ground) and with a stiff wind, it didn't move a bit, just under it's own weight.
But I fully understand where you're coming from Mike Thanks for following!
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  #24  
Old 19-01-2020, 08:42 AM
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Ok well, come'on then, get on with it.... this is like watching an excellent mini series on Netflix or Stan, can't wait to watch each new episode and you just want to binge watch!

Mike
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  #25  
Old 19-01-2020, 08:59 AM
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Quote:
Originally Posted by strongmanmike View Post
Ok well, come'on then, get on with it.... this is like watching an excellent mini series on Netflix or Stan, can't wait to watch each new episode and you just want to binge watch!

Mike

Ohh the teasing... But seriously though, I want it done aswell.
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  #26  
Old 19-01-2020, 09:01 AM
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this thing is gonna be insane when your done. im looking forward to seeing the pics of it standing in a paddock.

Thankyou Steve, looking forward to seeing it up and going as well.
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  #27  
Old 25-01-2020, 11:35 PM
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Some progress pictures...
Pretty much just the sandwich panel structure, and the roof that will roll off.
Some 100 x 100 SHS which I cut lengthways to form a channel, sits at the top, for the wheels to roll in, with some inverted angle iron in there for the "V" of the wheels to set on.
Sandwich panel glued and tech screwed on the inside and outside corners with angle.



Thanks for looking.
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  #28  
Old 26-01-2020, 11:53 PM
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Coming along, nicely insulated...few screws there

The walls look pretty high..?

Mike
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  #29  
Old 28-01-2020, 02:00 AM
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Originally Posted by strongmanmike View Post
Coming along, nicely insulated...few screws there

The walls look pretty high..?

Mike

Cheers Mike.
Yeah the walls are 2.3m so that the scope can be in any position when the roof has to close. Also to future proof for future setups.


Some more progress pictures. Got the roof on and it rolls freely. Next is flashing, weather/air sealing, install roof motor then the inside.
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  #30  
Old 14-02-2020, 01:32 AM
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I sandblasted and painted all the frames over the past week, between other jobs, that was a big job. Time to get on with the finer detail of the observatory.
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  #31  
Old 14-02-2020, 09:40 AM
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That's so funny Josh, I was coming on here to give you a rev up, as I needed my Bunn Observatory progress photos fix ....aaaand voila! there they were! You must be telepathic

Looking good

Mike
(over excited)
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  #32  
Old 14-02-2020, 10:21 AM
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Needs more steel
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  #33  
Old 14-02-2020, 10:29 AM
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Quote:
Originally Posted by strongmanmike View Post
That's so funny Josh, I was coming on here to give you a rev up, as I needed my Bunn Observatory progress photos fix ....aaaand voila! there they were! You must be telepathic

Looking good

Mike
(over excited)

Cheers Mike, thought you might have been wondering when the next photos are coming, the next lot wind be so far away


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Needs more steel

Now you tell me Thanks Troy!
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  #34  
Old 14-02-2020, 10:40 AM
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marc4darkskies (Marcus)
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Coming along nicely! Awesome work Josh! When are you going to erect it?
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  #35  
Old 14-02-2020, 10:44 AM
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Coming along nicely! Awesome work Josh! When are you going to erect it?

Thankyou Marcus.
In 2 to 3 weeks I'm thinking, taking into account giving the concrete footings time to harden.
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  #36  
Old 15-02-2020, 05:40 PM
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I dunno?...I can't help but suspect you will end up building stairs...

Mike
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  #37  
Old 15-02-2020, 05:43 PM
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Never gonna happen Mike, it's a compromise between the work involved and, well, getting up there
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  #38  
Old 16-02-2020, 11:45 AM
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Never gonna happen Mike, it's a compromise between the work involved and, well, getting up there
Yeah and when I come to visit, you can just winch me up with the crane there ...it'll handle 140kg?..won't it?

Mike
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  #39  
Old 16-02-2020, 12:17 PM
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The crane is good for 200kg, so you're safe there
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  #40  
Old 16-02-2020, 05:15 PM
Mckechg (Grant)
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Ok well, come'on then, get on with it.... this is like watching an excellent mini series on Netflix or Stan, can't wait to watch each new episode and you just want to binge watch!

Mike
Now, that's a mini-series I would watch - Grand Designs - Astro edition.
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