Big Telescope, Small Package: Waite Research 18" Renegade
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- Опубліковано 5 лис 2016
- Waite Research has a new Renegade Telescope design that fits an 18" Dobsonian in the trunk of most cars! Watch how Gordon assembles the small, light package of parts into a full-sized 18" telescope. And it only takes minutes!
- Наука та технологія
Straightforward, simple design. Nice large bearings made of wood. Excellent dampening when you build with wood. Beautiful scope! If I ever settle down in dark sky country I would seriously consider spending the money to have a scope like this permanently in place. You do very nice work, and from what I've seen from your mirror making workshops, Zambuto quality optics!
4:01 Look at this happy kid!!!
What a joyful face, sure you can be very proud of yourself for your beautiful achievement.
Love from Montréal
That is not a telescope it is a work of art..... beautiful.
Thanks for your kind comments! Much appreciated.
thank you for creating and sharing the video, I appreciate it.
Nicely made ! ❤
Very nice! And thanks for all of the great videos. Regards from South Africa :-)
Thanks! If you have any ideas for videos you would like to see, please let me know.
That's a very efficient design! Really cool.
We tried to rethink the Dobsonian telescope. When all you have is a table saw, you pretty much have to build a "box in a box" sort of design. But with CNC equipment, the sky is the limit. Now we can make them, lighter, stronger, simpler... just better in every way. Thanks! -Gordon
That is a really great design!
Thanks! Much appreciated!
q grande tu trabajo... vi un vídeo donde estaban haciendo uno pero ni comparación con tu trabajo. Te admiro, espero poder hacer uno igual en mi universidad acá en Perú. Saludos desde Ventanilla Callao Perú.
Nice job :)
Вы наверное сильно любите смотреть на звёзды , такой титанический труд.Молодцы.
Wow! belíssima montagem, muito capricho e acabamento impecável! parabéns!
Thanks for your kind words! Thank goodness for Google Translate!
Heeey :D Welcome back Gordon! You've been missed! I hope everything is well! :)
What a beautiful telescope!
Do you have any more production videos in the pipeline?
Emerson and I have been working on a video about the latest mirror-making machine we built. And we are working on some of the series on the 20" and the 18" we built earlier.
Fantastic news! I'll be looking forward to those. As will, I'm sure, many more!
Nice!
amazing gordon!! conglatulations!!! did you made that beautiful wood structure yourself?
Thanks! Yes, we build all of the Renegade structure outselves. We cut many of the wooden parts on a ShopBot CNC router. Most other things are pretty standard woodworking and metalworking steps. Emerson takes care of both our video projects and much of the sanding. Renee does much of the sealing, staining and polyurethane application. And I manufacture the primary mirrors. Our biggest advantage is doing everything possible in-house instead of having to contract with other suppliers.
I would be curious to see image taken by all theses huge DIY mirror
Невероятно!!! Вы молодец, ваши видео для меня как образец инженерного таланта, всё что вы делаете очень интересно и познавательно. С уважением из России Джабиев Виталий.
Beautiful! What is the diameter of the ground board and the mirror surround?
Man I want a telescope
You are my hero, Mr. Waite.
Thanks... Glad you enjoyed the video!
Gordon, if you don't mind me asking, what material did you use for the wall of the section at the end of the scope? I am assuming it's 1/8" plywood sheet or something to that effect just glued to the inside rim of the circular rings?
It's very thin aircraft plywood, about 2 or 3 mm thick. I route a groove in the end of the rings so the plywood has a good place to seat. And it is glued in place as well.
@@GordonWaite Awesome! Yeah it looked pretty flush with the edge of the rings. Was wondering if you grooved it out as well. Appreciate the information!
Hi Gordon, Why did you choose to use 8 poles (as opposed to six) in the barrel-design? Won't this make an over-constrained assembly?
If you only use six poles, it is hard to make a shroud that doesn't hang into the optical path. But really it's a tradition, I suppose. The older designs (many of which are still being built!) mostly used the "box in a box" design that originated with Dobson himself. With the old "box in a box", it is way easier to use eight poles and put them in the corners of the box. Hard to put six poles in four corners! But with our design, six poles would be a snap. Maybe you've motivated me to reconsider! Thanks! -Gordon
Hi Gordon, I don't know much about the optics-aspect - my question was purely from a mechanics-standpoint. I came across this one page: www.cloudynights.com/page/articles/cat/articles/optical-theory/stray-light-control-in-newtonian-telescopes-r2006 where the author also has a six-pole (Stewart-platform-esque) barrel. Cheers!
how often does the light gathering mirror need to have a new reflective coating?
Depends on where you live, and how often you use the telescope. If you live near the ocean, or near an industrial area with air pollution, you will probably have to recoat every two years or so. Otherwise coatings can last 5 years or even much more.
I've never used a dob before but I am very interested in them as a means of acquiring a large diameter scope. You hear all the time about eyepiece height at the zenith but I never have seen anyone comment on height at the horizon! As much as I don't want to be perched 3-6 feet off the ground neither do I want to be lying in the damp grass to look at an object low to the horizon! Thoughts?
For telescopes in the 16" and under category, the eyepiece height if you are looking at something, say 25 degrees above the horizon, might be in the 36" range. That's usually just a little below what you can do with a normal stool, but they do make observing stools that start a little lower.
Thanks Gordon... I'd say 95% of observing is done between 20-80° from the horizon so I guess it should not be a problem. I'm starting to think what would be the 'ideal' telescope and it seems to me it would be a dob with the eyepiece at the declination axis. So you would have a 3 mirror design sorta like a classical cassegrain but instead of reflecting the light thru the primary you bend it 90° thru the dec axis. You can then set the height of said dec axis to whatever you like and it will never change. Seems to me planewave or one of the big RC makers have one like that... wonder if one of the dob makers (hint hint) would contemplate something like that???
They started making those in 1845! Here is a link: www.astrosurf.com/re/fixed_eyepiece_telescopes.pdf
And the design has some issues. If you put a mirror at the top of the tube and reflect the beam back toward the primary, it requires quite a large mirror, like 40% obstruction. Lots of diffraction effects, and a lot of the incoming light is obstructed. And the third mirror down by the primary causes more loss of light. You can get around some of these issues by using a set of relay lenses, but they also absorb light, and inject aberrations into the final image. Not an easy problem to tackle!
Hi Gordon. That pdf was interesting and the design I'm thinking of is called a Nasmyth. It is Planewave that is making the Nasmyth in their .7m scope. For a 1/4 mill it better perform! LOL Planewaves design is simply their RC with the light path thru the dec axis so it does have a large secondary... but then all RC's do. What I am talking though is simply replacing the stock diagonal of a stock dob with an exact same size convex mirror. You don't give diagonal sizes for your scopes so I went to Obsessions site and their 25" F/4 uses a 4" minor axis secondary which gives only a 21% obstruction by diameter of the primary. I don't see a problem with this and the third mirror will be maybe about 2" minor axis so it will be in the cylinder of the secondary and not obstruct anything. Other than having to get someone to grind the convex secondary to the proper curve I really don't see much of a problem with this. Can you just imagine as other people are climbing 6 foot up a ladder to peek thru their dob you sit in a nice chair and look thru yours!?
A step in the right direction: 1) bigger and faster mirrors 2) more compact, modular collapsible mounts.
Do you sell these. If so what is your charge?
Yes, we sell the Renegade telescopes, through our company, Waite Research. The 18" f/3.6 with premium mirrors runs $11,200. If you are interested, please send me an email at gordon@waiteresearch.com. Thanks!
Hello Mr.Gordon. can we purchase this set?
Sorry, but that was sold quite a few years ago. Thanks!
Anybody no whare u can buy these i stay in britain
Email me at gordon at waiteresearch.com. We ship them all over the world. Thanks!
Very nice scope, but none of the hardware is captive.
What about collimation?
no one here cares about optics let alone collimation
For that money I can get a „goto“ telescope with the same optical quality, I want a telescope and not some furniture from IKEA
Not cheap!
$5800 for the 10" F/5!
A telescope to last the rest of your life! Quality counts.
@@GordonWaite LOL!