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Zane and Logan's 10 inch F/3 project

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#1 Lognic04

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Posted 19 March 2019 - 10:14 PM

Hi everyone,

Me and Augustus (zane) are working on a 10 inch f/3 telescope! I am making the mirror, and he will  be making the scope.

Hopefully tomorrow i will order all the materials and start grinding the mirror (first i need to get my machine running), a 25mm thick pyrex pregenerated blank.

Zane can fill in his details soon!

waytogo.gif


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#2 perfessor

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Posted 20 March 2019 - 08:44 AM

Awesome!  But who gets the finished scope? I'm thinking, you should each make 2...

 

Cheers!


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#3 Augustus

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Posted 20 March 2019 - 10:42 AM

Awesome!  But who gets the finished scope? I'm thinking, you should each make 2...

 

Cheers!

I've paid Logan for the mirror. He's planning on using it as practice with subdiameter laps so he can do a 16.5" meniscus mirror scope of a similar focal ratio. I do not have the knack for making mirrors that he does and I am a bit jealous!

 

I haven't really started designing the scope yet. It's going to use a Moonlite dual-speed focuser most likely, and a 74mm secondary mirror.  With my 20mm Lunt XWA and a Paracorr I can get a 2.2 degree true field - less than 1/4 of a degree smaller than Mel Bartels' 10.5" f/2.7. 


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#4 ckh

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Posted 20 March 2019 - 11:10 AM

Good luck young men.


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#5 gr5org

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Posted 20 March 2019 - 12:03 PM

One of you is in Australia and the other in USA?  How does that work?


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#6 Pinbout

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Posted 20 March 2019 - 04:56 PM

One of you is in Australia and the other in USA?  How does that work?

Long distance puppy love lol.gif



#7 LarsMalmgren

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Posted 20 March 2019 - 05:12 PM

Long distance puppy love lol.gif

funnypost.gif


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#8 Augustus

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Posted 20 March 2019 - 05:15 PM

One of you is in Australia and the other in USA?  How does that work?

It's actually not that expensive to ship the mirror from Australia to the US, so Logan's sending the mirror here and I'm going to get it coated at Majestic and plop it in the scope.


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#9 CHASLX200

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Posted 20 March 2019 - 06:50 PM

Better get a Paracorr.


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#10 David Castillo

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Posted 20 March 2019 - 06:55 PM

10" RFT- nice !popcorn.gif


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#11 Augustus

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Posted 20 March 2019 - 07:00 PM

Better get a Paracorr.

Already have one!



#12 roscoe

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Posted 20 March 2019 - 07:40 PM

I have hope for the future of amateur astronomy when I read of 16-year-olds making mirrors and building scopes!

 

Good stuff, both of you!


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#13 Dale Eason

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Posted 20 March 2019 - 09:05 PM

I've paid Logan for the mirror. He's planning on using it as practice with subdiameter laps so he can do a 16.5" meniscus mirror scope of a similar focal ratio. I do not have the knack for making mirrors that he does and I am a bit jealous!

 

I haven't really started designing the scope yet. It's going to use a Moonlite dual-speed focuser most likely, and a 74mm secondary mirror.  With my 20mm Lunt XWA and a Paracorr I can get a 2.2 degree true field - less than 1/4 of a degree smaller than Mel Bartels' 10.5" f/2.7. 

I hope you go look at Mel Bartel's telescope calculator.  The smallest secondary I found acceptable for visual is 3.1 inch. Which is what I used for my 10 inch F3. http://www.bbastrode...iteriaCalc.html

 

There may be a newer version of that calculator now so look around his site.



#14 Dale Eason

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Posted 20 March 2019 - 09:07 PM

Mel does have a new calculator here http://www.bbastrode...wtDesigner.html.


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#15 Pinbout

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Posted 21 March 2019 - 05:33 AM

I have hope for the future of amateur astronomy when I read of 16-year-olds making mirrors and building scopes!

 

Good stuff, both of you!

Zane maybe but Logan is younger than 16


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#16 Lognic04

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Posted 22 March 2019 - 12:05 AM

Mirror bought and paid for pregeneration. now to work on the grinding machine!


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#17 Lognic04

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Posted 24 March 2019 - 09:58 PM

Grinding machine is going well. I have made the turntable assembely, now i'm working on the overarm. I wasn't going to include it but i had an idea for a simple overarm that's easy to make.


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#18 Augustus

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Posted 25 March 2019 - 06:45 PM

Logan sent me this today. The mirror blank apparently got generated way ahead of schedule. Look at that sagitta!

Attached Thumbnails

  • sagitta.JPG

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#19 Lognic04

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Posted 25 March 2019 - 07:25 PM

Yes, 5.2mm - wow!


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#20 Lognic04

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Posted 25 March 2019 - 07:26 PM

Now i'm just waiting for the Ebay parts to finish the machine, and my plaster is baking in the oven now to get rid of excess water


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#21 Augustus

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Posted 25 March 2019 - 07:48 PM

I'm debating whether a Moonlite or an HC-2 makes sense on this thing.....



#22 Pinbout

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Posted 25 March 2019 - 07:49 PM

Moo lite  lol.gif


Edited by Pinbout, 25 March 2019 - 07:49 PM.

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#23 Lognic04

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Posted 26 March 2019 - 06:18 AM

Just finished the tool, pillow bearing won't arrive till thurs or friday (ugh) so can't start till then



#24 Lognic04

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Posted 28 March 2019 - 05:37 PM

Machine is coming closer to completion! Now all i have to do is implement the fixed post, add mirror supports and bearing holders and i can start at #240 grit - i'm hoping to finish fine grinding in about a week or so, as the machine really speeds things up.


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#25 zjc26138

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Posted 28 March 2019 - 07:11 PM

This is an awesome project and I can't wait to see the finish scope!




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