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The Kiln

Started by brucesdad13, 07/10/2015 07:16PM
Posted 07/10/2015 07:16PM Opening Post
I've been ranting about this in other threads but inspired by previous posts of observatory construction I figured I'd post my large mirror making progress. Keep in mind I know almost nothing about what I'm getting into so this will entail lots of idiotic mistakes and amusing failures. Maybe not amusing from my standpoint in the moment but surely later in life.

So here goes. Last Saturday an amazingly generous friend drove me from Barre, MA all the way to Fryeburg, Maine with his pickup and flatbed trailer to buy a kiln for $100 from Craigslist. We got it home way later than calculated and had to wait until the next day to get it into my garage. It took all three of us (myself, my friend, and the seller) an hour to get the kiln onto the flatbed and secured. This involved two floor jacks, a come-along, various dolleys, ramps, and so forth.

When the kiln was in transit bricks kept wiggling out and falling onto the flatbed (NOT GOOD!). I wish I had realized the kiln bricks were just sort of stacked in the welded frame by the seller/builder. One wall had imploded by the morning and I had to put it together again like a jigsaw puzzle. It was fortunate in that it forced me to confront my hesitation about later taking it apart and changing the dimensions to accommodate a large and shallow mirror mold.

Photo series will follow.

~ Charlie Stevenson

8" f/5.7 String Telescope - 1st Scope Build; 2nd Place Stellafane 2016 Optical Award for Newtonians 12.5" and Smaller
10" f/4.5 Newtonian (June 2015) mirror refigured by Optic Wave Labs P-V WaveFront 1/14.24, Strehl Ratio 0.993 (Aug '15)
Criterion RV-6 seems to be circa 1973 (June 2015) [For Sale]
Celestron C8-A XLT (January 2015) [For Sale]
Celestron PowerSeeker 70AZ (Christmas 2014)
Aldrich Astronomical Society member since 2015
http://astro.charleskelleystevenson.com/
Posted 07/10/2015 07:17PM #1
Picking up the kiln. Seller on right, friend on left, me at the camera. We're all wondering how well this will hold up in transit.

Attached Image:

brucesdad13's attachment for post 149805

~ Charlie Stevenson

8" f/5.7 String Telescope - 1st Scope Build; 2nd Place Stellafane 2016 Optical Award for Newtonians 12.5" and Smaller
10" f/4.5 Newtonian (June 2015) mirror refigured by Optic Wave Labs P-V WaveFront 1/14.24, Strehl Ratio 0.993 (Aug '15)
Criterion RV-6 seems to be circa 1973 (June 2015) [For Sale]
Celestron C8-A XLT (January 2015) [For Sale]
Celestron PowerSeeker 70AZ (Christmas 2014)
Aldrich Astronomical Society member since 2015
http://astro.charleskelleystevenson.com/
Posted 07/10/2015 07:18PM #2
Rest stop. Pushing bricks back into place. We ended up chaining and strapping the kiln in both directions so that if we had to stop quickly or accelerate it wouldn't shift. Not the best rig.

Attached Image:

brucesdad13's attachment for post 149806

~ Charlie Stevenson

8" f/5.7 String Telescope - 1st Scope Build; 2nd Place Stellafane 2016 Optical Award for Newtonians 12.5" and Smaller
10" f/4.5 Newtonian (June 2015) mirror refigured by Optic Wave Labs P-V WaveFront 1/14.24, Strehl Ratio 0.993 (Aug '15)
Criterion RV-6 seems to be circa 1973 (June 2015) [For Sale]
Celestron C8-A XLT (January 2015) [For Sale]
Celestron PowerSeeker 70AZ (Christmas 2014)
Aldrich Astronomical Society member since 2015
http://astro.charleskelleystevenson.com/
Posted 07/10/2015 07:19PM #3
Inside after reassembling the kiln to original dimensions

Attached Image:

brucesdad13's attachment for post 149807

~ Charlie Stevenson

8" f/5.7 String Telescope - 1st Scope Build; 2nd Place Stellafane 2016 Optical Award for Newtonians 12.5" and Smaller
10" f/4.5 Newtonian (June 2015) mirror refigured by Optic Wave Labs P-V WaveFront 1/14.24, Strehl Ratio 0.993 (Aug '15)
Criterion RV-6 seems to be circa 1973 (June 2015) [For Sale]
Celestron C8-A XLT (January 2015) [For Sale]
Celestron PowerSeeker 70AZ (Christmas 2014)
Aldrich Astronomical Society member since 2015
http://astro.charleskelleystevenson.com/
Posted 07/10/2015 07:19PM #4
Another showing width of kiln inside

Attached Image:

brucesdad13's attachment for post 149808

~ Charlie Stevenson

8" f/5.7 String Telescope - 1st Scope Build; 2nd Place Stellafane 2016 Optical Award for Newtonians 12.5" and Smaller
10" f/4.5 Newtonian (June 2015) mirror refigured by Optic Wave Labs P-V WaveFront 1/14.24, Strehl Ratio 0.993 (Aug '15)
Criterion RV-6 seems to be circa 1973 (June 2015) [For Sale]
Celestron C8-A XLT (January 2015) [For Sale]
Celestron PowerSeeker 70AZ (Christmas 2014)
Aldrich Astronomical Society member since 2015
http://astro.charleskelleystevenson.com/
Posted 07/10/2015 07:20PM #5
All put together... awaiting electrician and me to build a ramp/soak controller.

Attached Image:

brucesdad13's attachment for post 149809

~ Charlie Stevenson

8" f/5.7 String Telescope - 1st Scope Build; 2nd Place Stellafane 2016 Optical Award for Newtonians 12.5" and Smaller
10" f/4.5 Newtonian (June 2015) mirror refigured by Optic Wave Labs P-V WaveFront 1/14.24, Strehl Ratio 0.993 (Aug '15)
Criterion RV-6 seems to be circa 1973 (June 2015) [For Sale]
Celestron C8-A XLT (January 2015) [For Sale]
Celestron PowerSeeker 70AZ (Christmas 2014)
Aldrich Astronomical Society member since 2015
http://astro.charleskelleystevenson.com/
Posted 07/10/2015 07:20PM #6
And a stack of plate glass I bought from an old guy for $12

Attached Image:

brucesdad13's attachment for post 149810

~ Charlie Stevenson

8" f/5.7 String Telescope - 1st Scope Build; 2nd Place Stellafane 2016 Optical Award for Newtonians 12.5" and Smaller
10" f/4.5 Newtonian (June 2015) mirror refigured by Optic Wave Labs P-V WaveFront 1/14.24, Strehl Ratio 0.993 (Aug '15)
Criterion RV-6 seems to be circa 1973 (June 2015) [For Sale]
Celestron C8-A XLT (January 2015) [For Sale]
Celestron PowerSeeker 70AZ (Christmas 2014)
Aldrich Astronomical Society member since 2015
http://astro.charleskelleystevenson.com/