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Another Astro Chair

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#1 Pinbout

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Posted 06 April 2013 - 06:56 PM

I've wanting to build an Astor chair for the longest time. Finally, I was able to do this with very little hassle.
I had some scraps of 2x4 and a few small aluminum tubes with the star nuts in the ends. When I saw the small tubes, I knew I had to make this chair! NOW!

The next day, on my lunch break, I ran to HD picked up a hinge and some long carriage bolts with wing nuts. After dinner, without much cutting, I had the chair standing in front of me. Instead of cutting the notches in the front seat support, I glued and stapled some 1/2" baltic bosses.

For the seat, I had a leftover 10" donut hole from another uta I made. The curve of the round disc felt really nice. It’s very easy to sit down and get up.

I love the way the seat removes by opening the legs and sliding it over both 2x4’s.

Whoever came up with the Denver chair design? They're brilliant.


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#2 richard7

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Posted 06 April 2013 - 09:36 PM

Nice Job Danny. Sometimes the simplest ideas are the best.

#3 Tom McDonald

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Posted 07 April 2013 - 05:15 AM

I like it! :)
One thing tho, I would attach a piece of chain or something between the legs to prevent the "splits" if the back leg suddenly decides it wants to pull a prank on you! :shocked:

#4 Pinbout

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Posted 07 April 2013 - 07:12 AM

I know, didn't get there yet, but plan to.

Last night I used it anyway and the back leg kept walking forward when I was sitting low and leaning forward.

I thought see that's why I have to install that. :foreheadslap:

#5 RossSackett

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Posted 07 April 2013 - 08:14 AM

I was skeptical of the astrochair concept for several years, preferring a pneumatic drafting chair. But once I actualy tried one it became my go-to utility stool. I now use it not only at the scope, but also as an adjustable shop stool that puts me at just the right height for any tool.

#6 roscoe

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Posted 07 April 2013 - 10:22 AM

If it feels like it wants to close up sometimes, you could make a spacer stick instead of a chain that perhaps hinges near the bottom of the front post, and hooks to the rear, so you can still slide the seat off if you want.
R

#7 RossSackett

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Posted 07 April 2013 - 10:52 AM

The best spacer would be two sticks, hinged in the middle and on the ends. The end hinges are knuckles-up while the middle is knuckles-down so it locks when the legs are spread. That will prevent the legs from moving in or out.

#8 nevy

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Posted 07 April 2013 - 10:54 AM

Nice :applause:

#9 Rutilus

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Posted 07 April 2013 - 12:38 PM

That's a great chair, I'm going to be building one of thoses.

#10 Pinbout

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Posted 07 April 2013 - 12:39 PM

the best thing is it's cheap.

#11 Pinbout

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Posted 07 April 2013 - 04:14 PM

I wanted to keep the bar simple so I put a tnut on the back upright.

I put a hole in the front upright so I can rotate the bar to the front upright when closed.

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#12 starman345

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Posted 07 April 2013 - 04:27 PM

Nice job Danny, I"m going to try building one of those.

#13 jpcannavo

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Posted 07 April 2013 - 07:25 PM

Very, very nice!

And inspiring! (if I could only get my tools out of storage, Arrgghhh!!!)
One question though. I know its entirely standard with the Denver design, but I have always wondered how it would fare with the bottom cross-piece on the back leg. This would seem to allow one to get up closer to the scope. But what about stability? On first blush it dosen't seem that all that much would be given up. Thoughts?
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#14 Pinbout

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Posted 07 April 2013 - 07:42 PM

the bottom leg is under most of the weight, supporting it. The bottom leg wouldn't accomplish much being on the back leg.

I had no problem getting close to the scope, just rotate the chair so the bottom leg isn't in the way.

#15 northernontario

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Posted 07 April 2013 - 08:10 PM

What a great design.

Simple.

Functional.

Cheap.

Inspiring.

Last week my kids were teasing me about the dust collecting on the work bench......I think I found my next project.

jake

#16 Pinbout

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Posted 07 April 2013 - 08:20 PM

I think I found my next project.



and its an easy project, less than half a saturday - well if you paint it, more... :grin:

#17 richard7

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Posted 07 April 2013 - 08:50 PM

That is so nice. Now for a cushion on that seat.

#18 nitegeezer

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Posted 07 April 2013 - 08:53 PM

A while back I made one of these, but I put heater hose on the cross bolts that touch the upright and provides enough friction to clamp the seat in place. I can lift or lower the seat to any height I want while I am sitting on it rather than change it in stepped increments. It does come in very handy.

#19 Noisykids

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Posted 08 April 2013 - 03:39 PM

glad to see the spreader bar. i tried chain on mine and found it didn't work at all.

#20 Pinbout

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Posted 08 April 2013 - 04:59 PM

Now for a cushion on that seat.



I do have a drum throne I have to re-upholster, kill two seats in one sitting? :foreheadslap:


I'm going to leave it for now, school room furniture concept, I'm not that old...yet.

#21 Mike M.

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Posted 09 April 2013 - 12:04 PM

Sounds like a great idea. You mentioned you did this a while back, any concerns or issues with wear or slippage with the hoses?

#22 Ed Holland

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Posted 09 April 2013 - 01:57 PM

I like this - and think I have all the suitable parts & materials available already. It could easily be left outside at our place in a quiet corner and would be a welcome improvement to my upturned bucket. Thanks for sharing the design.

Cheers

Ed

#23 nitegeezer

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Posted 09 April 2013 - 02:43 PM

I have had no issues with the hoses, but there is one trick to it. I have a long bungee cord that goes from the bottom of the back leg, up through an eye-bolt up top and then down to the back side of the seat. This always keeps just a little pressure between the hoses and the wood. You can then take one finger to the back and push down or under the seat and lift up and the seat follows.

#24 Pinbout

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Posted 09 April 2013 - 06:16 PM

and think I have all the suitable parts & materials available already.




That's exactly why I made it, not much needed.
Plus the night before, I cracked a teak chair leg.


It could easily be left outside at our place in a quiet corner



;)

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#25 Scanning4Comets

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Posted 10 April 2013 - 03:11 PM

Danny,

You do some really excellent work !!!! :waytogo:

Cheers,






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