NHRob
Post Laureate
Reged: 08/27/04
Posts: 3277
Loc: New Hampshire
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I'm playing around with my 12.5" f/6 truss dob design some more. I was thinking of standard 8-truss with orthoganal mirror box but .... I'm less satisfied with that.
I'd like to do something different. Anybody got "funky" designs they'd liek to post pics of?
Looking for inspiration, not to copy.
Thanks,
Rob
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Rob
**********************
Canon 12x36 IS binos
TEC-140: #433 on CGEM
Faworski orthos (7,10,16.7mm)
stuff ...
no free time ... lots of clouds !
" Life is what happens to you while you're busy making other plans" !!
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Chriske
Kijkerbouw Urania
Reged: 08/15/04
Posts: 2160
Loc: Boechout, Belgium
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Maybe this can help...?
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Chris
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NHRob
Post Laureate
Reged: 08/27/04
Posts: 3277
Loc: New Hampshire
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neat!
I'm thining more of a 6-pole now.
Rob
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Rob
**********************
Canon 12x36 IS binos
TEC-140: #433 on CGEM
Faworski orthos (7,10,16.7mm)
stuff ...
no free time ... lots of clouds !
" Life is what happens to you while you're busy making other plans" !!
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jg3
sage
Reged: 05/27/07
Posts: 332
Loc: near Auburn, CA
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My 12.5" f/6.3 came out kind of funky - the whole hexagonal idea flowed naturally from attaching the mirror cell's three mounting bolts directly to the lower truss poles. The split tube is handy for getting in and out of the house - one bulky but light unit, the other heavy but small. Total OTA weight is 40 lbs. I very loosely applied R.F. Royce's web-published design (but left off the rotating head to save weight).
If this helps inspire your own ideas, great, but take its lessons too. Few would want to copy this newt-on-a-GEM that's way too big for the LXD-75 that it sits on (although the OTA is very sturdy). This thing could be dob-mounted without any more surgery than attaching bearing rings to either side of the center box. Wobbles and ladder-climbing aside, it has been a pleasure on both deep-space and planets. So I think you chose a great spec. Good luck on your own version.
Please bear with me as I don't have a web site to channel the pictures through. Hopefully it comes through in an attachment.
jg3
near Auburn, CA
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RossSackett
scholastic sledgehammer
Reged: 08/17/07
Posts: 756
Loc: Memphis, TN
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Here's a 12 inch single pole
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"A craftsman relies on science when the state of knowledge allows it, tradition and experience when it does not, and makes art whenever he can."
12 scopes from 4.25 to 18" and a 24" in progress. 12 ATM awards. Webpage: http://stardazed.com/ Some more scope pix at http://www.flickr.com/photos/8315630@N04/
Anagrams: Amateur astronomer = A mature moon-starer; Dobsonian maker = Debonair as monk
Edited by RossSackett (05/08/08 12:35 PM)
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RRavneberg
professor emeritus Rest in Peace 19xx-2009
Reged: 12/02/05
Posts: 634
Loc: Columbus, OH
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Twin-strut 10" f/5 with integrated curved secondary support and light shield.
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Ron Ravneberg
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Jeff Morgan
Carpal Tunnel
Reged: 09/28/03
Posts: 2081
Loc: Prescott, AZ
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Rob,
I just finished a 12.5" f/6 Dob, 6 pole carbon fiber truss and carbon fiber light shield. This weekend I should be able to get some photos and post on this forum.
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Jeff Morgan
Prescott, AZ
Wile E. Coyote School of Telescope Making
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bbriggs
sage
Reged: 01/09/06
Posts: 217
Loc: Graham, Wa.
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I am redoing a 14.5" I am going to a 6 tube. I plan to put the mirror cell in this.
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18 f4.5 home made newt
14.5 f4.5 homemade newt w/Zambuto
16x70 Fujinon Binoculars 20x110 Garrett Binoculars
Denk II power x switch 21's and 14's
31, 17, 9 Naglers
Televue Ranger
Astrogizmos Portable Observatory
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llanitedave
Humble Megalomaniac
Reged: 09/26/05
Posts: 13781
Loc: Amargosa Valley, NV, USA
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A light bucket? 
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"Since the process of science generates more mysteries than it solves, we can never learn everything, we'll simply generate new ignorance at the speed of knowledge."
"S.O.E." (Sauron's Other Eye), with 16" Royce conical mirror: A permanent work in progress.
10" Homebuilt dob, old Coulter mirror
Under Construction: The "Eye of Sauron" Observatory!
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RossSackett
scholastic sledgehammer
Reged: 08/17/07
Posts: 756
Loc: Memphis, TN
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Cool handles, too. Muy clever. Gives me an idea for my next travelscope.
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"A craftsman relies on science when the state of knowledge allows it, tradition and experience when it does not, and makes art whenever he can."
12 scopes from 4.25 to 18" and a 24" in progress. 12 ATM awards. Webpage: http://stardazed.com/ Some more scope pix at http://www.flickr.com/photos/8315630@N04/
Anagrams: Amateur astronomer = A mature moon-starer; Dobsonian maker = Debonair as monk
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jayscheuerle
Post Laureate
Reged: 01/16/06
Posts: 4263
Loc: S. Philadelphia, PA
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42" f/5.  - j
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Fight indignorance!
120ED, 12" f/5 Green Goblin, 6" f/5 Eero2, 4.5" f/8 PortaBowl, 8" f/5 Big Red Ed.
The PortaBowl-a $100 4.5" f/8 ball-scope YOU can build!
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NHRob
Post Laureate
Reged: 08/27/04
Posts: 3277
Loc: New Hampshire
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Jeff,
Cool! Can't wait to see pics.
Rob
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Rob
**********************
Canon 12x36 IS binos
TEC-140: #433 on CGEM
Faworski orthos (7,10,16.7mm)
stuff ...
no free time ... lots of clouds !
" Life is what happens to you while you're busy making other plans" !!
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RossSackett
scholastic sledgehammer
Reged: 08/17/07
Posts: 756
Loc: Memphis, TN
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Jay,
DEFINITELY. It still looks like a Luxo lamp to me. That is such an organic design--it looks so friendly. Kinda like an oversized robot puppy, always delighted to see you.
Ross
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"A craftsman relies on science when the state of knowledge allows it, tradition and experience when it does not, and makes art whenever he can."
12 scopes from 4.25 to 18" and a 24" in progress. 12 ATM awards. Webpage: http://stardazed.com/ Some more scope pix at http://www.flickr.com/photos/8315630@N04/
Anagrams: Amateur astronomer = A mature moon-starer; Dobsonian maker = Debonair as monk
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RossSackett
scholastic sledgehammer
Reged: 08/17/07
Posts: 756
Loc: Memphis, TN
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...and I see you have the new 6" diameter Ethos... 
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"A craftsman relies on science when the state of knowledge allows it, tradition and experience when it does not, and makes art whenever he can."
12 scopes from 4.25 to 18" and a 24" in progress. 12 ATM awards. Webpage: http://stardazed.com/ Some more scope pix at http://www.flickr.com/photos/8315630@N04/
Anagrams: Amateur astronomer = A mature moon-starer; Dobsonian maker = Debonair as monk
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Darenwh
Pooh-Bah
Reged: 05/11/06
Posts: 1470
Loc: Covington, GA
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Looks like a crazy amusement park ride J.... I love your designs by the way... Very well done and very well thought out...
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Daren
Covington, GA
Edited by Darenwh (05/09/08 05:39 PM)
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Jarad
Post Laureate
Reged: 04/28/03
Posts: 4424
Loc: Atlanta, GA
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Quote:
...and I see you have the new 6" diameter Ethos...
Not to mention the 8" AP finder scope....
Jarad
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rboe
Reged: 03/16/02
Posts: 47545
Loc: Phx, AZ
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Kinda of a "How NOT to do it" with a couple neat options. Notice the large wheels and post hole digger handles. Makes for very easy yard travel and the handle let me rotate the scope easier.
The base is standard fair from Astro-System plans about 15-20 years ago. And way too heavy. Works though.
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Ron
NS11GPS
Pronto
16" dob
15X70 Obies
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llanitedave
Humble Megalomaniac
Reged: 09/26/05
Posts: 13781
Loc: Amargosa Valley, NV, USA
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Yeah, notice that if you run over the dog with it, you can cause some real damage! 
--------------------
"Since the process of science generates more mysteries than it solves, we can never learn everything, we'll simply generate new ignorance at the speed of knowledge."
"S.O.E." (Sauron's Other Eye), with 16" Royce conical mirror: A permanent work in progress.
10" Homebuilt dob, old Coulter mirror
Under Construction: The "Eye of Sauron" Observatory!
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Chriske
Kijkerbouw Urania
Reged: 08/15/04
Posts: 2160
Loc: Boechout, Belgium
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Quote:
Yeah, notice that if you run over the dog with it, you can cause some real damage!
In my opinion he already did.
Yep, looks dead to me....!
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Chris
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NHRob
Post Laureate
Reged: 08/27/04
Posts: 3277
Loc: New Hampshire
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Ron,
Looks very nice.
You really should bury that dog, though!
Rob
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Rob
**********************
Canon 12x36 IS binos
TEC-140: #433 on CGEM
Faworski orthos (7,10,16.7mm)
stuff ...
no free time ... lots of clouds !
" Life is what happens to you while you're busy making other plans" !!
|
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